ESTIMATION OF SOME GENETIC PARAMETERS AND HETEROSIS IN MAIZE BY USING HALF DIALLEL CROSS
A half diallel cross compression six purelines of maize (DKEC6022, ZP-197, Sargrin, IK58, Vegasfrun, ZP-595) was carried out, the purelines and their hybrids planted in 5 July 2018 at the field of college of agricultural engineering sciences, university of Duhok. Using randomize complete block design with three replicates to studies heterosis and genetic parameters. The result showed significant difference among parent and their crosses for all characters. The combining ability analysis of variance results indicated that mean square of genotypes, general and specific combining ability was significant for all traits indicated that the presence of additive and non-additive gene effects controls all traits.
The parents Sargrin had the highest value for the yield components and the hybrid (IK58 x Vegasfrun) exhibit significant average performance and give the highest heterosis for grain yield 89.5% and yield 230.379 g). the heritability broad sense was high for days to 75% tasseling and silking, plant and height, leaf area, No. of rows/ear, No. of grain/ row, kernels weight/ear, weight of ear and shelling percent
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