Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (5): 1015-1023.DOI: 10.3969/j.issn.1004-1524.20230736

• Animal Science • Previous Articles     Next Articles

Association of FGF5 and COQ9 gene polymorphism and growth traits in Tan sheep

MA Li’na1(), TIAN Jinyang2, WANG Jin1, ZHAO Zhengwei1, MA Qing1,*()   

  1. 1. Institute of Animal Sciences, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China
    2. Tan Sheep Breeding Farm in Ningxia Hui Autonomous Region, Wuzhong 751102, Ningxia, China
  • Received:2023-06-07 Online:2024-05-25 Published:2024-05-29

Abstract:

To explore the polymorphisms of fibroblast growth factor 5 (FGF5) and coenzyme Q9 (COQ9) genes and their associations with growth traits in Tan sheep fibroblast growth factor (FGF5) and coenzyme Q9 (COQ9), so as to provide a theoretical basis for the use of molecular marker-assisted breeding methods to improve the growth traits of Tan sheep, the polymorphisms of FGF5 and COQ9 genes were detected in 107 Tan sheep using SNP typing technology for the loci screened in the previous study, and the body weight of primary birth, 35 days old, 6 months old and 12 months old was analyzed. The results showed that two SNPs were screened on the FGF5 gene of Tan sheep by alignment with the reference genome of sheep (GCF_000298735.2_Oar_v4.0), which were g. 94540629 T>G and g. 94540642 T>C, where g. Three genotypes, TT, GT and GG, were produced g.94540629 T>G, and three genotypes of TT, TC and CC were generated at the g.94540642 T>C loci. Three SNPs were screened in the COQ9 gene, which were g. 94503480 A>G, g. 24807700 A>G and g. 24812228 T>C, where three genotypes of AA, AG and GG were produced at the g.94503480 A>G loci, three genotypes of AA, AG and GG3 were generated at the g.24807700 A>G loci, and three genotypes of TT, TC and CC were generated at the g.24812228 T>C loci. Gene polymorphism analysis showed that the five SNPs loci were highly polymorphic and in the Hardy-Weinberg equilibrium state in the Tan sheep population (P>0.05). The results of association analysis showed that the weight of the g.94540642 T>C locus of FGF5 gene C/T genotype at 12 months was significantly greater than that of other genotypes (P<0.05), the body weight of GG genotype at the g.24807700 A>G locus of COQ9 gene was significantly greater than that of other genotypes at 12 months (P<0.05), and the body weight of g.24812228 T>C loci C/C genotype at 12 months was significantly greater than that of other genotypes (P<0.05), it was concluded that the three SNP loci had a significant effect on the body weight of Tan sheep at 12 months, the COQ9 gene g. 24812228 T>C and g.24807700 A>G loci were in strong linkage imbalance in the Tan sheep population, the FGF5 gene g. 94540629 T>G and g. 94540642 T>C loci were in strong linkage imbalance in the Tan sheep population, and the COQ9 gene g. 94503480 A>G, g. 24807700 A>G and g. 24812228 T>C locus genotypes combination A/GA/AT/T and A/GA/GT/C were significantly higher than those of other combination genotypes at birth weight, 6 months weight and 12 months weight (P<0.05). FGF5 and COQ9 gene polymorphisms were significantly correlated with the growth traits of Tan sheep, and the FGF5 and COQ9 genes could be used as candidate genes for the breeding of growth traits and molecular markers of weight traits in Tan sheep, and the breeding efficiency of Tan sheep could be improved by conventional breeding combined with molecular marker-assisted selection.

Key words: Tan sheep, FGF5, COQ9, gene polymorphisms, growth trait, association analysis

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