A genetical-statistical estimation of field trials results for breeding strains on example of winter wheat
Stanisław Węgrzyn
s.wegrzyn@ihar.edu.plZakład Oceny Jakości i Metod Hodowli Zbóż, Instytut Hodowli i Aklimatyzacji Roślin w Krakowie (Poland)
Abstract
Three sets of preliminary trials of winter wheat strains were analyzed for yielding performance and genotype-environment interactions. The magnitude of particular interactions was measured by means of index of variability. This index consists of the phenotypic coefficient of variability and the portion of respective variance component (GL) or (GS). The index of interaction and genetic effects of yield were changed into 5-degree scale (5 is the highest yield or the lowest interaction). In particular groups of trials above half of phenotypic variance could be attributed to the genotype-environment interactions. One-year analysis of particular trials was shown to be unsatisfactory for selection of new cultivars of winter wheat. Also, two-years and three-years analyses were compared. It has been shown, that two-year analysis was sufficient for assessing new strains of winter wheat. However, this conclusion requires confirmation with similar elaborates.
Keywords:
preliminary trials, genetic effect, genotype × season interaction, genotype × location interaction, winter wheatReferences
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Authors
Stanisław Węgrzyns.wegrzyn@ihar.edu.pl
Zakład Oceny Jakości i Metod Hodowli Zbóż, Instytut Hodowli i Aklimatyzacji Roślin w Krakowie Poland
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