التحليل الوراثي لهجين الجيل الثاني من التهجينات التبادلية في حنطة الخبز Triticum aestivum L.

الملخص EN

The Fj generation from half diallel crosses between five varieties, of bread wheat {Triticum aestivum L.) (Iniesar.Rabbea’a, Abu-Greeb-3, Adnanyi and AL-Eaz) were used to estimate general combining ability for parental varieties, specific combining abiHtj' for their half diallel crosses in Fi generation, Inbreeding depression in Fj generation and Broad sense heritability for the following traits : plant height, number of tillers, number of spikes per plant, spike length, number of grains per spike, 100 seeds weight and grain yield per plant.

The results indicated that there were additive and non-additive gene effects for all the studied traits.

The non-addivite gene effects is more important than the additive for determining these characters.

Some of hybrids showed positive values and significant Inbreeding depression in Fj generation for studied traits on the other hand, some hybrids showed negative values and significant inbreeding depression in F ? generation for this studied traits.

Broad sense heritability estimate were high for : plant height, number for tillers per plant, number of spikes per plant, spike length, grain yield per plant.

Medium for 100-grain weight, and low for number of grains per spike.