Assessing Grain Yield Stability of Rice Genotypes under Humid Climate of Northern Iran

The purpose of this study was to study the stability and adaptability of 12 advanced lines of rice with two control varieties (Fajr and Neda cultivars). These genotypes were evaluated over 3 years of cultivation (2011-2013) in a randomized complete block design with three replications and three locations including Amol, Sari and Tonekabon. In this research, the stability statistics including Romer’s environmental variance, Francis and Kannenberg coefficient of variation, Wrick’s ecovalance, Shukla stability variance, AMMI stability value, lin and Binns parameter, within location coefficient of variation and Tai regression method were used to evaluate genotypes stability. Based on environmental variance and coefficient of variation, lines 7, 9 and Neda cultivar were stable and showed acceptable yield. According to Shukla stability variance, wrik’s eco-valance parameters and yield, lines 1, 7, 9, 12 and Fajr cultivar were the best genotypes. The results of variance and Lin and Binns parameter indicated that lines 10, 7 and 1 were the best genotypes. Based on AMMI stability parameter, lines 1, 2, 4, 7, 12 and Neda variety showed the best stability and yield. Tai regression results indicated that lines 7, 9, 12, and Fajr and Neda cultivars had the best stability and yield. Based on all methods, lines 7, 9 and Fajr cultivar were identified stable and with the  yield of 6032.44, 5879.59 and 5755.81 kgr/ha respectively stayed above the average of all genotypes.