Prof. Mirjana Jankulovska (Faculty of Agricultural Sciences and Food-Skopje) Prof. Sonja Ivanovska (Faculty of Agricultural Sciences and Food-Skopje)
This research was performed to assess agronomic performance of ten advanced wheat mutant lines on farmers’ fields and to determine the best mutant lines for each site, the highest yielding and the most stable genotypes, as well as the most representative locations, by using GGE (Genotype + Genotype x Environment) biplot technique. Mutant lines included in the study were developed by gamma ray treatment (250 Gy), the selection was made in M2 generation for lines with improved quality. The advanced mutant lines from M7 generation were planted in 10 different environments in order to assess their stability and adaptability. The experimental sites L4, L5 and L6 had longest vectors from the biplot origin and were the best sites for genetic differentiation of analysed mutant lines. Mutant lines 5/1-8 and 4/2-56 had the best performance on sites L1, L3, L7, L8 and L9, mutant lines 5/1-199 and 7/1-143 on L2 and 2/2-21 and 2/1-51 on L4, L5, L6 and L10. The sites located at the same sectors on the graph, form two separate mega-environments. The mutant line 5/1-8 had the highest average grain yield, followed by 4/2-56, 2/2-21 and 8/2-137/1. The most stable mutant lines in all testing sites were 4/2-56 and 8/2-137/1. Although the mutant line 2/2-21 had high yield, it did not have stable performance in all environments. The mutant line 4/2-56 was the closest to the “ideal” genotype, and it should be considered for cultivation in all environments evaluated within this study. L4 and L5 were the most discriminating as well as most representative environments. These should be considered as the best environments for wheat stability testing and included as experimental sites in future studies. This study provides valuable information about the agronomic performance of advanced wheat mutant lines at different sites of the country which can be used for breeding stable and adaptable wheat varieties for specific regions.
|Country or International Organization||Republic of Macedonia|