Usefulness of trial sites for testing winter rye breeding materials

Tadeusz Śmiałowski

zhsmialo@cyf-kr.edu.pl
Zakład 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 rye

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Published
2001-09-28

Cited by

Śmiałowski, T. and Węgrzyn, S. (2001) “Usefulness of trial sites for testing winter rye breeding materials”, Bulletin of Plant Breeding and Acclimatization Institute, (218/219), pp. 409–417. doi: 10.37317/biul-2001-0077.

Authors

Tadeusz Śmiałowski 
zhsmialo@cyf-kr.edu.pl
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland

Authors

Stanisław Węgrzyn 

Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland

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