تقدير التوريث و درجة من الهيمنة لبعض الصفات من الذرة (ذرة ميس (L. خطوط الفطرية

Abstract EN

This study was conducted at Al-Tuwaitlia Experimental Station (33° 06'N, 44° 34’ E, 24 masl), the Agricultural and Biological Research Center in fall 1994 and 1995.

A diallel cross program was conducted for ten local maize inbred lines according to the fixed model, method 2 of Griffing.

The objective of this study was to estimate the genetic variance components, the degree of dominance, and heritability.

A significant genetic variance within the population that facilitates selection for several agronomic traits was investigated.

Values of dominant genetic variance exceeded additive genetic variance for all traits under investigation that reflected the overdominance and / or the epistatic effect due to the value above than one of the degree of dominance.

Broad sense heritabilities were increased, whereas they decreased for narrow sense heritabilities for all traits except teaseling and silking date in 1994 and ears per plant and weight of 300 kernels in 1995.

Results may emphasize the additive gene action due to cumulative effect for these traits and it may make selection for the next generations more easy and efficient.