Usefulness of trial sites for testing winter rye breeding materials
Tadeusz Śmiałowski
zhsmialo@cyf-kr.edu.plZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Stanisław Węgrzyn
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Abstract
The analysis of usefulness of 7 trial sites for testing yields of winter rye breeding materials was carried out on the base of results of preliminary breeding experiments from the years 1992–2000. For this purpose the usefulness index (wj) was elaborated. The wj index may assume values from 0 to 1 and indicates the level of genotype-environment interaction. If the index value is near 0, the level of genotype-environment interaction is high and the locality is very useful for the testing of yield. If the index is close to 1, the locality is less useful because the genotype-environment interaction is suppressed, so the locality does not show differences in yield potential. The localities were ranked: according to the value of usefulness index the lowest index was for Smolice (0,72), and the highest for Dańków (0,81). Difference between the lowest and the highest values of the index appeared to be little — about 12%. The Pearson’s coefficient of correlation and Spearman’s rank correlation between yield of a single locality and the total mean yield of all localities, and subsequently between yields of two, three etc. localities and the total mean yield were also calculated to designate determination coefficients r2j = 100*rp * rs. Using the coefficient rj2 the investigated localities were ranked to show to what extent they explain variability of tested genotypes. The most of information on variability of genotypes was contributed by Smolice (47%), then Radzików (20%) and Wierzenica (16%). The remaining 4 localities: Sobiejuchy, Laski, Choryń, and Dańków gave not more than 5 % of information.
Keywords:
trial sites, winter ryeReferences
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Authors
Tadeusz Śmiałowskizhsmialo@cyf-kr.edu.pl
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Authors
Stanisław WęgrzynZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
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