China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (9): 3312-3322.doi: 10.16431/j.cnki.1671-7236.2021.09.022

• Genetics and Breeding • Previous Articles     Next Articles

Association Analysis Between Polymorphisms of DGAT1,NR6A1 and MAN1A1 Genes and Growth Traits in Ujumqin Sheep

ZHANG Jinhua, SHANG Mingyu, HU Wenping, ZHANG Li   

  1. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2021-03-08 Online:2021-09-20 Published:2021-09-17

Abstract: The aim of this study was to elucidate the polymorphisms of g. 13504098 C>T of diacylglycerol acyltransferase 1 (DGAT1) gene, g. 11204707 A>C of nuclear receptor subfamily 6 group A member 1 (NR6A1) gene and g. 18795097 C>T of alpha-mannosidase (MAN1A1) gene, and its association with the growth traits in Ujumqin sheep, providing new genetic markers for high productivity molecular breeding of Ujumqin sheep. g. 13504098 C>T, g. 11204707 A>C and g. 18795097 C>T of DGAT1, NR6A1 and MAN1A1 genes in Ujumqin sheep were detected by Sequenom MassARRAY®SNP assay, and the linear mixed model was used to analyze the association between genotypes and the growth trait in Ujumqin sheep at 4 and 6 months of age. The results showed that three genotypes were detected at three loci. Specifically, g. 13504098 C>T included CC, CT and TT genotypes, CC genotype was dominant genotype (0.49), C was the dominant allele (0.70). g. 11204707 A>C included AA, CA and CC genotypes, AA genotype was dominant genotype (0.54), A was the dominant allele (0.73). g. 18795097 C>T included CC, TC and TT genotypes, TC genotype was dominant genotype (0.51), C was the dominant allele (0.55). χ2 test indicated that g. 13504098 C>T, g. 11204707 A>C and g. 18795097 C>T of Ujumqin sheep were in Hardy-Weinberg equilibrium (P>0.05). Population genetic analysis showed that g. 13504098 C>T, g. 11204707 A>C and g. 18795097 C>T were at moderate polymorphisms in Ujumqin sheep population (0.25<PIC<0.50). Association analysis revealed that g. 13504098 C>T was extremely significantly associated with the body weight, body height, chest girth, shin circumference of Ujumqin sheep at 4 and 6 months of age, and the chest width at 6 months of age (P<0.01);g. 11204707 A>C was extremely significantly associated with the body height and body length of Ujumqin sheep at 4 and 6 months of age, the body weight at 4 months of age, and the chest girth at 6 months of age (P<0.01), and it was significantly associated with the body weight and shin circumference at 6 months of age (P<0.05);g. 18795097 C>T was extremely significantly associated with the body height at 4 months of age and the chest girth at 6 months of age (P<0.01), and significantly associated with the body weight and chest girth at 4 months of age, and the chest width at 6 months of age (P<0.05). Therefore, it could be concluded that g. 13504098 C>T of DGAT1 gene, g. 11204707 A>C of NR6A1 gene and g. 18795097 C>T of MAN1A1 gene had significantly correlation with the growth traits of Ujumuqin sheep, indicating that 3 SNPs could be used as candidate molecular markers for genetic breeding in Ujumuqin sheep.

Key words: sheep; DGAT1 gene; NR6A1 gene; MAN1A1 gene; growth traits

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