Abstract
ABSTRACT This paper deals with a statistical method for selecting widely-adapted genotypes in a target region. Yield was the trait for adaptation analysis although different crop productivity traits could be used for this analysis. Wide adaptation of a genotype was defined as a norm of a trait response in a target region across years. On this norm, a genotype's wide adaptation is the response of a productivity trait at a level not lower than the mean of all genotypes (environmental index) in every location within a target region in every year. The aim of this paper was to present a primary experimental evidence that supports the hypothesis that Kang's yield-stability statistic (YS i ) could be a sufficient selection index for selecting widely-adapted genotypes. In these studies, real experimental data, obtained from a single year multilocation balanced series of yield trials of spring wheat (Triticum aestivum) and oat (Avena sativa),are used. It has been proved that yield-stability statistic, YS i , could...
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