بررسي نوع عمل ژن در كنترل ژنتيكي صفات زراعي ذرت با استفاده از تلاقي دي آلل

Study of the gene action in controlling agronomic traits in maize (Zea mays L.) -using diallel crossing design

Study of the action of genes involved in controlling grain yield, plant height, ear height, ear length, ear diameter, grain/ear row, row no./ear, grain no.lear, 100 grain weight, cob percent, grain weight/ear, in maize, a diallel cross with 14 inbred lines was carried out. Parents and their F Iʹs were tested using randomized complete block (RCB) design with three replications in Research station of Seed and Plant Improvement Institute, Karaj in 2006 cropping season. Significant (p60%), the estimate of narrow sense heritability for yield was 25%, high value belonged to the number of grain row per ear (71%) and low value obtained for ear height (18%). Parents with high GCA for grain yield were KI911. K\66B and K3615/2 inbred lines. For other traits, GCA effect was significant in about 50% of the inbred lines. SeA effect was significant in few crosses for all the traits. The highest heterosis for grain yield was observed in A679 x K3493/1 cross.