IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Contribution of pre anthesis photoassimilates to grain yield: its relationship with yield in Argentine sunflower cultivars released between 1930 and 1995
Autor/es:
LÓPEZ PEREIRA, M.; BERNEY, A.; HALL, A.J.; TRÁPANI, N.
Revista:
FIELD CROPS RESEARCH
Editorial:
Elsevier Science BV
Referencias:
Año: 2007 vol. 105 p. 88 - 96
ISSN:
0378-4290
Resumen:
Abstract
Published analyses of the changes in yield potential of the sunflower crop in Argentina across cultivars released between 1930 and 1995
suggested that part of the observed increase in yield potential could have arisen from a larger contribution from non-structural carbohydrates (NSC)
present in the crop at anthesis. To test this idea, stems and receptacles were harvested at intervals over the anthesispost-physiological maturity
phase from crops, grown under good water and nutrient availability conditions, of three open-pollinated (OP) cultivars and five hybrids released at
various times between 1930 and 1995. Stem NSC and structural biomass (SB) at anthesis diminished in the hybrids as compared with the OP
cultivars (and across year of cultivar release), in spite of the fact that some hybrids had a significantly greater ( p < 0.05) stem NSC concentration at
anthesis. By contrast, receptacle SB and NSC concentration at anthesis showed no sign of change with year of release. Stem NSC content fell from
early grain filling or from anthesis in all cultivars while receptacle NSC content rose and then fell during grain filling in most cultivars. In five of the
cultivars examined, receptacle NSC content was greater at physiological maturity than at anthesis. Crop and organ NSC content dynamics varied
across cultivars, in association with variations in cultivar stem biomass at anthesis, stem NSC concentration at anthesis, and cultivar particularities
in post-anthesis NSC accumulation. Cultivar differences in changes of crop NSC content between anthesis and physiological maturity (DNSCA-PM,
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
anthesis. By contrast, receptacle SB and NSC concentration at anthesis showed no sign of change with year of release. Stem NSC content fell from
early grain filling or from anthesis in all cultivars while receptacle NSC content rose and then fell during grain filling in most cultivars. In five of the
cultivars examined, receptacle NSC content was greater at physiological maturity than at anthesis. Crop and organ NSC content dynamics varied
across cultivars, in association with variations in cultivar stem biomass at anthesis, stem NSC concentration at anthesis, and cultivar particularities
in post-anthesis NSC accumulation. Cultivar differences in changes of crop NSC content between anthesis and physiological maturity (DNSCA-PM,
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
p < 0.05) stem NSC concentration at
anthesis. By contrast, receptacle SB and NSC concentration at anthesis showed no sign of change with year of release. Stem NSC content fell from
early grain filling or from anthesis in all cultivars while receptacle NSC content rose and then fell during grain filling in most cultivars. In five of the
cultivars examined, receptacle NSC content was greater at physiological maturity than at anthesis. Crop and organ NSC content dynamics varied
across cultivars, in association with variations in cultivar stem biomass at anthesis, stem NSC concentration at anthesis, and cultivar particularities
in post-anthesis NSC accumulation. Cultivar differences in changes of crop NSC content between anthesis and physiological maturity (DNSCA-PM,
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
+37.7 to 55.7 g m2) were also found, and these changed with year of cultivar release in each of the OP and hybrid categories, tending toward a
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for greater sunflower yield in Argentina over the cultivar release period 19301995.
null variation of DNSCA-PM in the most recent releases of both groups of cultivars. In each of these two groups of cultivars, DNSCA-PM also
diminished with crop growth rate during grain filling, a variable that showed a strong (r2 = 0.65) linear relationship with yield corrected for oil
synthesis costs. The value of DNSCA-PM as an additional (to crop growth rate during grain filling) explanatory variable for yield corrected for oil
synthesis costs, was non-significant.We conclude that, under conditions of ample water and nutrient availability, there is no evidence that cultivar
differences in NSC economy during grain filling had an important role in breeding for