GENOTYPE X ENVIRONMENT INTERACTION AND STABILITY OF GRAIN YIELD AND SELECTED QUALITY TRAITS IN WINTER WHEAT IN CENTRAL ASIA
Publication Date : 12/01/2018
High grain yield and improved quality determine commercial success of winter wheat (Triticum aestivum L.) varieties in Central Asia. This study was conducted to determine effect of environment on grain yield, 1000-kernel weight (TKW), test weight (TWT), protein and gluten content, and to identify superior wheat genotypes for yield and quality. Thirty winter wheat genotypes were evaluated in three years (2010-2012) over multiple locations. Genotype and genotype x environment interaction (GGE) biplot analysis was used to determine superior genotypes. There were significant effects of environment and genotype x environment interaction on yield and quality traits. The 30 wheat genotypes showed variations for grain yield (3.7 to 5.6 t ha-1), TKW (33.6 to 42.4 g), TWT (753 to 797 g/l), protein (13.3 to 14.8%) and gluten (27.2 to 29.5%) content. There was a significant positive correlation between grain yield and TKW in three out of seven environments. There was no correlation of grain yield with TWT, protein and gluten content with one exception. There were different sets of five most superior genotypes for individual traits. However, certain genotypes were superior based on grain yield and quality traits. ‘Gozgon’, ‘Elomon’, ‘ID800994.W/Vee//Lagos-12’, ‘Jaikhun’, and ‘Kroshka’ were five most superior genotypes for four quality traits. ‘Elomon’, ‘Gozgon’, ‘Jaikhun’ ‘ID800994.W/Vee//Lagos-12’, and ‘Kiriya’ were five most superior genotypes based on grain yield, TKW, TWT, protein and gluten content. This study demonstrates wheat breeding successes in combining high yield and improved quality in winter wheat. This study provides information on combined stability of high yield and improved quality of the internationally important winter wheat genotypes. Therefore, the results of this study could be valuable for national and international winter wheat breeding programs to develop new varieties with high, stable grain yield and quality.
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