IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Predicting pre-harvest sprouting susceptibility in barley: looking for "sensitivity windows" to temperature throughout grain filling in various commercial cultivars.
Autor/es:
NICOLÁS A. GUALANO AND ROBERTO L. BENECH-ARNOLD
Revista:
FIELD CROPS RESEARCH
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2009 vol. 114 p. 35 - 44
ISSN:
0378-4290
Resumen:
Pre-harvest sprouting (PHS) is common in cereals that lack grain dormancy ifmaturing grain is exposed
to rain. This phenomenon leads to immediate loss of seed viability, and since the malting process
requires germination, its occurrence is highly undesirable in malting barley crops. Dormancy release rate
is genetically and environmentally controlled. We evaluated the effect of temperature during grain
filling on the dormancy release pattern (and then on the PHS susceptibility) of grains from five malting
barley (Hordeum vulgare L.) cultivars widely sown in Argentina, with the aim of predicting PHS
susceptibility of a barley crop from easy-to-gather data. Barley cultivars (Quilmes Ayele´ n, Q. Palomar, Q.
Paine´ , B1215 and Scarlett) were sown on different dates over a 3-year period for generating variability in
the thermal environment during grain filling. The period from pollination to physiological maturity (PM)
was adjusted to a thermal time (TT) scale, which was then arbitrarily divided into 50 8C d intervals. Mean
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
susceptibility of a barley crop from easy-to-gather data. Barley cultivars (Quilmes Ayele´ n, Q. Palomar, Q.
Paine´ , B1215 and Scarlett) were sown on different dates over a 3-year period for generating variability in
the thermal environment during grain filling. The period from pollination to physiological maturity (PM)
was adjusted to a thermal time (TT) scale, which was then arbitrarily divided into 50 8C d intervals. Mean
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
Hordeum vulgare L.) cultivars widely sown in Argentina, with the aim of predicting PHS
susceptibility of a barley crop from easy-to-gather data. Barley cultivars (Quilmes Ayele´ n, Q. Palomar, Q.
Paine´ , B1215 and Scarlett) were sown on different dates over a 3-year period for generating variability in
the thermal environment during grain filling. The period from pollination to physiological maturity (PM)
was adjusted to a thermal time (TT) scale, which was then arbitrarily divided into 50 8C d intervals. Mean
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
air temperature within each interval and for the whole filling period was calculated for the different
sowing dates. Dormancy release pattern was followed by determining aweighed germination index (GI)
throughout grain filling and maturation. We sought a linear relationship between temperature during
grain filling and GI at some moment after PM. For all barley cultivars, except B1215, a significant
(p < 0.001) and positive correlation was found between the GI of grains with 1020% moisture content
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
(fresh basis) and mean temperature within TT intervals located at the last stages of seed development.
Then, simply temperature-based models for predicting crop PHS susceptibility were generated for each
barley cultivar. Moreover, we intended a single, universal prediction model constructed with data from
all cultivars. Two general forms were proposed, but the relationships were slightly less tight when each
barley cultivar model was used. A preliminary validation for each cultivar model was done for three
genotypes with independent data from four sites of themajor barley production area in Argentina. When
comparing experimental and field data regressions we did not find significant differences in slope for any
cultivar (p > 0.25). However, most of the observed GIs were higher than predicted. This upwards
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.
displacement of GItemperature relationship suggests the role of other environmental factors (i.e. water
and soil N availability, day length), differing among tested locations. We are currently evaluating and
quantifying the effect of these factors with the aim of improving PHS susceptibility prediction in malting
barley crops.