Regional evaluation of wheat genotypes for grain protein level in the central west of New South Wales

Abstract

The analysis of wheat protein data from ten homozygous genotypes grown at six locations in 4 years gave a heritability estimate of 50%, and another of 65% from a sub-set of genotypes of similar maturity. The first-order interactions, genotype x year and genotype x location, were small and nonsignificant. An examination of the variance of a genotype mean indicated that selection in regional testing programs could be based on data from as few as three trials. Laboratory error represented a large proportion of this variance, thus more than one laboratory determination will be necessary.