تجزيه ژنتيكي عملكرد و اجزاء عملكرد دانه در ذرت

Genetic Analysis of Grain Yield and Yield Components in Maize

In order to determine the genetic control of yield and yield components in naize, generation mean analysis of cross of two inbred lines B73 and K18 using 1, P2, Fl, BC1 and BC2 generations was conducted in year 2000 in Karaj. A .randomized compelet block design in three replications was used for this study. Analysis for grain yield showed the additive and dominance and also, some epistatic effects in this trait. For 1000 kernel weight and number of rows per ear, lominance effects were more important than additive. There are high dominance ffects for number of kernels per ear row, but, also negative additive effects were presented for this trait. High degree of dominance for grain yield and kernel lepth showed the importance of dominance and over dominance effects of genes for controlling of these traits.