برآورد اثرات ژن و تركيب پذيري عملكرد و اجزاء عملكرد ارقام برنج (Oryza sativa L) به روش تلاقي ديالل

Gene Effect and Combining Ability Estimation of Yield and Yield Components of Rice (Oryza sativa L.) Using Diallel Mating Method

To estimate combining ability and the model of gene action for some quantitative characters, 5 different rice genotypes were used for producing a half diallel hybrids. To consider 7 quantitative traits, hybrids and their corresponding parents were evaluated based on a randomized complete block design with three replications at the Rice Research Station of Amol, Iran in 2007. Mean squares regarding genotypes were statistically significant at 1% level of probability for all the studied traits. Significant general and specific combining abilities for all traits implied that additive and non- additive effects were effective in controlling these traits. Also, a non significant ratio I for all characters except for 1000 grain weight expressed the greater importance of non-additive genetic effects rather than the additive ones for controlling the studied traits. Overall, parents Dasht, Neda and Binam were superior in general combining ability and hybrids Mashad DomsiahxBinam and BinamxIR6287-l-10 were the best for specific combining ability regarding yield and its components.