تأثير انتخاب الدجاج المحلي لصفة كتلة البيض في بعض الصفات الإنتاجية

الملخص EN

A group of local chicken was selected for eggs mass character after 112 days of the onset of laying through three generations, Pullets were reared on built-uplitter until the sixteenth week of age, then they were transferred to cages battery in an open conventional houses.

The results showed an increase in egg mass of 3.16 kg eggs in the parent generation F0 to 4.46 kg eggs in the second generation F2, when parents of the parent, first, and second generation were selected at an intensity of 51.8%, 63.7%, 70.2% respectively, the selective cumulative difference selection of that character was estimated in the second generation F2 to 2.56 kg eggs.

Selection response and Selection success were 0.47, 0.24 respectively, the reality heritability (h2 rea.) of the egg mass was 0.32.

When the direct selection of local chicken egg mass character was done an indirect selection appeared in different intensity for each of the egg production character ,egg-laying, eggs weight and clicked eggs, eggs production raised from 0.50 egg per hen in the parent generation F0 to 0.69 egg per hen in the second generation F2, as well as egg-laying intensity which was increased raised 49.9% in the parent generation F0 to 68.7% in the second generation F2, and egg weight from 55.8 g in the parent generation F0 to 57.4 g in the second generation F2, but for the clicked eggs decreased from 2.73 eggs in the parent generation F0 to 1.17 eggs in the second generation F2