Heritability, genetic and phenotypic correlation of carcass characteristics in local and commercial chickens
DOI:
https://doi.org/10.59658/jkas.v12i4.5118Keywords:
genotypes, carcass, heritability, genetic parametersAbstract
The purpose of study is to compare the carcass characteristics and estimation of genetic parameters of two genotypes of chicks. The study was carried out, at the Kani-Graw private field – Erbil City. Two genotypes of chickens were selected which were widely raised in the region, Super-Harco commercial and local chickens. During the peak of production, each genotype was distributed to five groups, with each group including one wing-banded rooster (known sire) with five hens (dams). Three hundred fertile eggs of two genotypes were collected. 235 Day old chicks were hatched from fertile eggs, each genotype was considered as first generation to evaluate the estimate genetic parameters for carcass characteristics at 12 weeks. The results cleared that significant differences (P≤0.05) between the two genotypes, commercial chicks showed higher significant in body weight, carcass weight breast, thigh, wing and live with lower gizzard and heart than local chicks. on the other hand, no significant variation was observed in dressing percentage between two genotypes. In relation to effect of sex, as it described that the males were more significantly (P ≤ 0. 05) recorded on all carcass traits except of dressing percentage and thigh weight. In relation to genetic parameters for carcass traits, the results showed that estimated heritability of body weight at 12 weeks, dressing percentage, heart, gizzard and liver weight were low to moderate and ranged from (0.13-0.44) and (0.14- 0.53) respectively for commercial and local chicks. The genetic and phenotypic correlation estimates among body weight and carcass characteristics (dressing percentage, heart, gizzard and liver) illustrated a close relationship between these traits. Positive genetic and phenotypic correlations were found between above mention traits from (0.18 -0.52), (0.22-0.74) and (0.09 –0.35), (0.14-0.49) respectively for commercial and local chicks
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