Association of chicken growth hormone (CGH) gene polymorphism with growth traits in RIR

Abstract

Meena, R., Kumar, S., Bhanja, S.K., Mehra, M., Choudhary, C. and Aruna, T.S. 2024. Association of chicken growth hormone (CGH) gene polymorphism with growth traits in RIR. Indian Journal of Poultry Science 59(01): 3–6. The aim of study was to assess allelic polymorphism of chicken growth hormone (cGH) gene and their association with growth traits in RIR chicken. Jugular vein was used to collect blood samples from 120 pullets belonging to two hatches. Data were recorded on body weight at 20 and 40 weeks of age (BW20 and BW40). Amplified product was digested with SacI restriction enzyme to reveal the polymorphic pattern. Allele frequencies were observed as found 0.17 (A), 0.76 (B) and 0.07 (C). Genotypic frequencies of AA, BC and BB genotypes were 0.17, 0.13 and 0.7, respectively. Significant association was found of cGH -RFLP genotype with BW20 and BW40 (P<0.15). The overall least squares means along with standard error of BW20, BW40 were observed as 1214.69±12.99 and 1567.63±16.66 g. The birds with BC genotype achieved higher BW20 and BW40 as 1431.84±70.04 g and 1750.64±76.31 g, respectively. The study suggested cGH locus BC RFLP genotype can be used as a potential marker to enhance growth of RIR birds.