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Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.21.0166    [Accepted] Published online September 15, 2021.
Genetic variants of the growth differentiation factor 8 affect body conformation traits in Chinese Dabieshan cattle
Shuanping Zhao1  , Hai Jin1  , Lei Xu1  , Yutang Jia1,* 
Anhui Province Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei 230031, China
Correspondence:  Yutang Jia,Email: yutang2018@163.com
Received: 9 April 2021   • Revised: 9 June 2021   • Accepted: 27 August 2021
Abstract
Objective
The growth differentiation factor 8 (GDF8) gene plays a key role in bone formation, resorption, and skeletal muscle development in mammals. Here, we studied the genetic variants of GDF8 and their contribution to body conformation traits in Chinese Dabieshan cattle.
Methods
Single nucleotide polymorphisms were identified in the bovine GDF8 gene by DNA sequencing. Phylogenetic analysis, motif analysis, and genetic diversity analysis were conducted using bioinformatics software. Association analysis between five SNPs, haplotype combinations, and body conformation traits was conducted in 380 individuals.
Results
GDF8 was highly conserved in seven species, and the GDF8 sequence of cattle was most similar to the sequences of sheep and goat based on the phylogenetic analysis. The motif analysis showed that there were 12 significant motifs in GDF8. Genetic diversity analysis indicated that the polymorphism information content of the five studied SNPs was within 0.25 to 0.5. Haplotype analysis revealed a total of 12 different haplotypes and those with a frequency of < 0.05 were excluded. Linkage disequilibrium analysis showed a strong linkage (r2 > 0.330) between the following SNPs: g.5070C > A, g.5076T > C, and g.5148A > C. Association analysis indicated these five SNPs were associated with some of the body conformation traits (p < 0.05), and the animals with haplotype combination H1H1 (-GGGGCCTTAA-) had greater wither height, hip height, heart girth, abdominal girth, and pin bone width than the other (p < 0.05) Dabieshan cattle.

Conclusion

Overall, our results indicate that the genetic variants of GDF8 affected the body conformation traits of Chinese Dabieshan cattle, and the GDF8 gene could make a strong candidate gene in Dabieshan cattle breeding programs.
Keywords: Body Conformation Traits, Chinese Dabieshan Cattle, Association Analysis, Growth Differentiation Factor 8 Gene


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