بررسي تركيب پذيري عمومي و خصوصي پنج لاين ذرت براي صفات مختلف با استفاده از تلاقي هاي دي آلل

General and specific combining abilities of five maize inbred lines for different traits in diallel crosses.

General and specific combining abilities of 5 inbred lines of maize with their crosses (Direct - crosses) were evaluated in randomized completely blocks design with four replications. Variance analysis showed genetical variation for all traits. GCA effects for all traits except for kernel depth were significant and SCA effects for all traits except for 1000-kernel weight and ear wood percentage were significant. Thus genes with nonadditive effects were important in the kernel depth while additive effects were importatnt in 1000 kernel weight and ear wood percentage. The importance of genes with additive and nonadditive effects were similar for different traits such as; days to silking, days to pollening, plant height, ear height, days to physiological maturity, ear length, No. of kernel/row, yield, days to full maturity and ear diameter. Genes with additive effects were more important with regard to nonadditive effects for No. of leaves above ear and No of kernel rows. The results indicated that K1515 , MO17 lines for increasing yield, K1515 and K1254/2 for early maturity, MO17 for increasing 1000-kernel weight and No.of kernel/rows, K1263/8 and k1254/2 for increasing No.of kernel rows and ear diameter were suitable for breeding program.