Association of genetic polymorphism in GH gene with milk production traits in Beijing Holstein cows

Journal of biosciences

Guo Li Zhou1²  Chen Liu¹  Hai Guo Jin¹  Shan Li²  Yu Hou Wu²  Qi Zhu² 

[1] Branch of Animal Husbandry Jilin Academy of Agricultural Sciences, Gongzhuling, Jilin 136100, People's Republic of China$$;College of Life Science, Liaocheng University, Liaocheng, Shandong 252059, People’s Republic of China$$

关键词: Beijing Holstein cows;    growth hormone gene;    genetic polymorphism;    milk production traits;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Associations were analysed between polymorphisms of the growth hormone gene (GH-MspI) (localized in intron 3) and milk production traits of Beijing Holstein cows (a total of 543 cows). Polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) method was used for identification of various genotypes. Frequencies of genotypes were 0.77, 0.21 and 0.02 for A/A, A/B and B/B, respectively. The frequency of the 𝐺𝐻𝐴 allele is 0.875.The results of the least squares means show that in all three lactations, the GH A/A cows yielded more milk (𝑃 < 0.01 for lactation I and 𝑃 < 0.05 for lactations II and III), whereas A/B cows showed higher milk fat content than A/A individuals (𝑃 < 0.05 for lactations I and II, and 𝑃 < 0.01 for lactation III). The A/A cows yielded more fat than A/B individuals (𝑃 < 0.01 only in lactation I). The A/A cows yielded more milk protein than A/B individuals (𝑃 < 0.01 for lactations I, II, and III). The A/A cows produced milk of higher protein content than of A/B individuals (𝑃 < 0.05 only in lactation II).

【 授权许可】

Unknown