ارزيابي عملكرد و اجزاء عملكرد دانه ذرت با استفاده از تلاقي هاي ديالل

Evaluation of grain yield and yield components in maize using diallel crosses

Ten combinations of diallel crosses of five maize inbred lines and their parents were evaluated for grain yield and yield componenets using randomized complete block design in four replications at Karaj and five other locations including Gorgan, Kerman, Shiraz, Esfehan and Hamadan in year 2000. Combined analysis of variance over locations revealed significant differences among genotypes for all traits, except kernel depth. Environmental effect was significant, showing differences among environments. Significant genotypexenvironment effect for all traits(except for number of kernels per ear row) was observed, indicating genotypic control of number of kernels per ear row and environmental effects on other traits. Diallel analysis for grain yield and yield components indicated presence of dominance effects for grain yield, for additive .effects 1000 kernel weight and number of rows per ear, and dominant and additive effects for number of kernels per ear row. ʹHowever, the additive effects were more important than dominant effects in controlling number of kernels per ear row.