INBA   12521
INSTITUTO DE INVESTIGACIONES EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Environmental Effects on the Expression of Genotypic Differences in Wheat Grain Viscosity
Autor/es:
LEVY-HÄNER L; STAMP P; KREUZER M; HERRERA JM; PELLET D
Revista:
CROP SCIENCE
Editorial:
CROP SCIENCE SOC AMER
Referencias:
Lugar: Baltimore; Año: 2015 vol. 55 p. 1311 - 1319
ISSN:
0011-183X
Resumen:
Wheat
(Triticum aestivum L.) grains are widely used as a feed. Contrasting to the
demand of a high viscosity for bread making, a low viscosity is required for
monogastric livestock. The impact of genotype and climate on this trait is
largely unknown. Therefore, seven wheat varieties grown at five sites in
Switzerland from 2007 to 2009 were analyzed for the potential applied
viscosity, that is, the viscosity after inactivation of the plants? own
enzymes. The varieties covered a wide range in viscosity, thus representing
different classes of wheat quality. Agronomical traits and meteorological data
were related to viscosity by correlation and regression analyses. The average
daily temperature (ADT) from 20 to 34 d after heading was closely and
negatively correlated with viscosity (r = −0.73), which, on the average over
all varieties, explained 54% of the variability in viscosity. The impact of
precipitation was just 4%. One variety was temperature insensitive. In the six
thermosensitive varieties, the viscosity in a given environment could be
predicted accurately by a linear regression developed from the average
temperature during grain development. The existing genetic variability enables
the identification of high-quality feed wheat varieties and facilitates breeding
for temperature-stable, low-viscosity feed wheat varieties