مطالعه اثر گروه ژنتیکی بر صفات رفتاری و تولیدی و برآورد میزان هتروزیس برای وزن لاشه در بلدرچین ژاپنی

In this study, male and female birds of two strains including pure white (P1) and pure wild (P2) were chosen as parental generation and were crossed reciprocally to create the F1 progeny. The F1 birds were mated randomly to produce the F2 progeny. The studied traits were body weight at different ages, slaughter weight, carcass weight, carcass composition, internal organs, tonic immobility (TI) and rectal temperature. The statistical model included the fixed effects of the genetic group, sex, color, and age. Orthogonal comparisons used to test the observed heterosis included F1:P1, P2; F2:P1, P2 and F1, F2:P1, P2. F1 birds performed better than the average of the parental strains showing heterosis rates of +10.1 and +8.6% for slaughter weight and carcass weight, respectively. The effect of sex on slaughter weight and carcass percent was significant (P < 0.01). Duration of TI in white strain was higher than those of the wild strain and F1 progeny. The results indicated significant genetic effects for production traits and tonic immobility, a fear indicator, in Japanese quail.