Investigation on the Grain Yield Stability of Promising Cold Region Bread Wheat Cultivars and Lines by Using Different Stability Statistics
Subject Areas : Journal of Crop Ecophysiology
1 - Associate Prof, Faculty of Agriculture, Department of Agriculture Biotechnology, Azarbaijan Shahid Madani University, Tabriz, Iran
2 - Seed and Plant Improvement Department, Natural Resources and Agriculture Research Center of East Azarbaijan, Tabriz, Iran
Keywords: Wheat, GGE biplot, Adaptability, AMMI analysis,
Abstract :
This study was conducted to determine the yield stability of 10 cold region bread wheat genotypes, using a randomized complete block design with 3 replications for 4 years (2009-2013) at the Agricultural and Natural Resources Research Center of East Azerbaijan, Iran. Combined analysis of variance showed significant differences (p<%1) among genotypes, environments and their interactions (GxE). Thus, stability analyses were carried out using non- parametric rank, environmental Roemer variance, environmental CV, Wrick’s ecovalence, stability variance of Shukla, Eberhurt and Russell, Penthus coefficient of determination, simultaneous selection, AMMI and GCE biplot methods. Results of stability analyses through different methods showed that Mihan cultivar, promising lines of 7 (Gaspard/Attila) and 1 (Shi#4414 /Crow” s “//Kvz/6/1-68-120/5/Gds/4/Anza) with 7.36 , 7.12 and 7.12 t/ha respectively were the most stable and high yielding genotypes and thus can be cultivated in East Azerbaijan and some other similar climatic conditions. Among different methods of stability analyses, simultaneous selection was problematic in introducing stable and high potential genotypes, because it introduces mainly the cultivars with highest yields as stable ones. Environmental Roemer variance and environmental CV, also, introduce the cultivars with lowest yields as stable ones.
