yield stability of rice promising lines in mazandaran province

نویسندگان

ایمان عشقی

دانشجوی سابق کارشناسی ارشد اصلاح نباتات، دانشگاه محقق اردبیلی، اردبیل، ایران رسول اصغری زکریا

دانشیار، دانشکدۀ علوم کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران علیرضا نبی پور

استادیار، سازمان تحقیقات، آموزش و ترویج کشاورزی، مؤسسۀ تحقیقات برنج کشور، آمل، ایران امید سفالیان

دانشیار، دانشکدۀ علوم کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران محمد نوروزی

چکیده

in order to investigate the yield stability of eight promising rice genotypes, these lines along with shiroudi and fajr cultivars as control were sown in three regions of mazandaran province (amol, sari and tonekabon) as randomized complete block arrangements with three replications in 2012 and 2013. analysis of variance for grain yield indicated significant differences among the genotypes in all environments (six experiment). combined analysis of variance with assumption of random effects for year and location and fixed effect for genotype, revealed significant genotype main effect and year×location, genotype×location and genotype×year×location interactions. to determine the yield stability of the genotypes, were calculated several stability parameters including the variance and coefficient of environmental variability, wricke’s equivalence, shukla’s stability variance, regression coefficient, variance of deviation from regression, variance within locations, mean rank and its standard deviation. the results showed that the promising lines 27610-33-1-1 and 2765-3-5-1-2 were superior than fajr cultivar and without significant differences with shiroudi cultivar in respect of grain yield. based on the majority of stability parameters, lines 27610-33-1-1, 2765-3-5-1-2 and shiroudi cultivar were recognized as stable genotypes with average yield of 7531, 6424 and 6501 kg per hectare, respectively.

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