Vol: 31 Page: 169

Authors:
Anna Rajfura
Wiesław Mądry

Title:
 Selection of widely adapted genotypes using simultaneous index including their regional yield mean and stability

Language: Polish

Keywords:
yield stability of genotypes
adaptation of genotypes
two-way mixed heteroscedastic ANOVA model
selection
spring wheat

Summary:
In the paper a new Kang’s method (Kang 1993) is presented. This method has been developed in order to select genotypes in crop multi-location performance trials using both regional means of yield and its stability variance (Shukla 1972) for tested genotypes. The application of the method for multi-location series of experiments on spring wheat is done. The main subject of the studies was to show with real experimental example that the considered Kang’s approach could be an useful tool to select effectively those genotypes, among tested ones, for which yielding model in a target region would be the most similar to the a’posteriori defined check genotype widely adapted to the considered region. Such a widely adapted genotype is assumed to be stable in dynamic (agronomic) sense as regard to yielding (Becker & Leon 1988, Piepho 1996) and as well as to perform regional mean of yield above general mean over all tested genotypes. Selecting widely adapted genotypes in a range of the target region is one of the two main strategies (the other strategy involves specifically adapted genotypes) of breeding and registration of crop varieties (Lin & Binns 1994, Braun I in. 1996).