Oybek AMANOV, Safar ALIKULOV, Shakhnoza KHAZRATKULOVA, C. Ram SHARMA, Amir AMANOV, Zokhid ZIYADULLAEV, Zafar ZIYAEV, Dinara MUZAFAROVA

Genotype × environment interaction and stability of grain yield and selected quality traits in winter wheat in Central Asia

High grain yield and improved quality determine the commercial success of winter wheat (Triticum aestivum L.) varieties inCentral Asia. This study was conducted to determine the 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 wereevaluated in 3 years (2010 2012) over multiple locations. A genotype and genotype × environment interaction biplot analysis was usedto determine the superior genotypes. There were significant effects of environment and genotype × environment interaction on yieldand quality traits. The 30 wheat genotypes showed variations for grain yield (3.7 5.6 t ha 1), TKW (33.6 42.4 g), TWT (753 797 g/L),protein (13.3% 14.8%), and gluten (27.2% 29.5%) content. There was a significant positive correlation between grain yield and TKWin 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 grainyield and quality traits. Gozgon, Elomon, ID800994.W/Vee//Lagos-12, Jaikhun, and Kroshka were the five most superior genotypes forfour quality traits. Elomon, Gozgon, Jaikhun, ID800994.W/Vee//Lagos-12, and Kiriya were the five most superior genotypes based ongrain yield, TKW, TWT, protein, and gluten content. This study demonstrates success in wheat breeding for combined high yield andimproved quality in winter wheat. This study provides information on the combined stability of high yield and improved quality of theinternationally important winter wheat genotypes. Therefore, the results of this study could be valuable for national and internationalwinter wheat breeding programs to develop new varieties with high stable grain yield and quality.

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