دراسة بعض المؤشرات الوراثية للإنتاجية البذرية و مكوناتها في قرع الكوسا Cucurbita pepo L.

Abstract EN

Nine inbred lines of summer squash, Cucurbita pepo L.

and their 36 F1 hybrids obtained from half diallel, were studied at Altybh station in GCSAR in Syria, during the two seasons of 2008/2009 to investigate some genetic parameters for seed yield and other 12 traits to determinate the suitable breeding method.

The results showed that there was a narrow range of difference between the genetic and phenotypic variance coefficient estimations for most traits proving that these traits were mostly governed by genetic factors.

The highest genotypic variance was observed for seed yield plant (27.85%), followed by seed fruit weight (20.38%).

The ratio σ2g σ2s and degree of dominance indicated that a dominance component controlled most traits.

The heritability estimations were moderate (29.6%, 23.5%) for seed yield plant and fat percent respectively, they ranged from moderate to high estimations for seed yield components and quality traits suggesting that heterosis breeding might be advantageous for obtaining higher gains in these traits