برآورد پارامترهاي ژنتيكي و محيطي صفات مهم اقتصادي در مرغان بومي فارس

Estimation of (co) variance components of Economically important traits in native fowls of Fars province

Performance records of 15790 female birds on body weight at the end of 12 week (BW 12), egg number (EN), egg weight (EW), and age at sexual maturity (ASM) and performance records of 5463 male birds on BW12 of Fars native fowls breeding center, Collected over years (1989 to 2000, were analyzed using a multivariate animal model. Restricted maximum likelihood was used to estimate genetic and environmental variance of each trait and covarianceʹs among them using the estimated (co) variance components, the heritability of Bw12, En, EW and ASM were obtained 0.69, 0.41, 0.65 and 0.5 respectively. Genetic and environmental covariances and correlation among traits are also presented.