Abstract:

This study was designed to determine the relation between the meat performance of Zhuanghe Dagu Chicken and combination effects of ghr gene and igf-1 gene. PCR-RFLP technique was used to analysis the polymorphisms of ghr gene and igf-1 gene, while least square method was used to analysis the correlation between the meat performance of the 17 weeks old Zhuanghe Dagu chicken and specific genotypes as well as the combination effect of ghr, igf-1. It turned out that both of the genes have 3 different genotypes, the frequency of each genotype met the Hardy-weinberg equilibrium. The chickens with the combination genotype GGTT, GHTT and GGKT had significant better performances in terms of live weight, carcass weight, semi-eviscerated weight, eviscerated weight, pectorales weight, average daily gain than those with other genotypes (P<0.05). Above all, combination genotype GGTT, GGKT, GHTT of both ghr gene and igf-1 gene contribute significantly to the meat performance of the chickens. Further study was still needed to determine whether these specific genotypes could be taken advantage as candidates in the breeding application.