Genetical Analysis of Diallel Crosses in Bread Wheat (Triticum aestivum L.)

Six varieties of bread wheat (Panalas, Gemeney, Saberbeg, 69-S3, 35-S6, Kvz/cgn) and their half diallel crosses were used to estimate general combining ability, specific combining ability and heterosis for the following traits: heading time, flag leaf area, maturity time, resistance to lodging, plant height, number of tillers and biological yeild. Seeds of parents and their hybrids were grown during the growing season 2001-2002 at the plant experimental station, college of Education, Mosul University, using randomized complete block design with four replications, depending on rainfall under natural conditions. Significant differences among the genotypes and significant variance for both general and specific combining abilities for all studied traits were detected. Most of hybrids had significant desirable heterosis for studied traits.