China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (7): 2766-2776.doi: 10.16431/j.cnki.1671-7236.2023.07.017

• Genetics and Breeding • Previous Articles     Next Articles

Polymorphism of MSTN Gene and Its Association Analysis with Meat Quality Traits in Sheep

TAO Maohai, MENG Ke, RONG Xuan, QIANG Hao, NIE Wei, GUO Chenhao, FENG Dengzhen   

  1. College of Agriculture, Ningxia University, Yinchuan 750021, China
  • Received:2022-12-02 Published:2023-06-30

Abstract: 【Objective】 The aim of this study was to investigate the polymorphism of myostatin (MSTN) gene and its effect on meat quality traits in sheep, in order to provide effective genetic molecular marker for the selection and breeding of meat performance in sheep.【Method】 The variation sites of MSTN gene in 91 sheep including Dupo sheep (D), Tan sheep (T) and Small-tailed Han sheep (XH) were obtained using liquid phase capture sequencing technology, and the single nucleotide polymorphism (SNP) with significant interspecific differences were screened.A total of 30 sheep (D, T, XH and Dupo×Tan×Small-tailed Han sheep (DTH)) were genotyped for the selected site using in-flight mass spectrometry to analyze its association with meat quality traits in sheep.【Result】 Three genotypes were detected for rs129059715 of MSTN gene in 4 sheep populations, including 15 CC genotypes, 9 CA genotypes and 6 AA genotypes, with C being the dominant allele (except for Dupo×Tan×Small-tailed Han sheep). rs129059715 was in Hardy-Weinberg equilibrium in Dupo, Tan and Dupo×Tan×Small-tailed Han sheep populations (P>0.05), and was in Hardy-Weinberg disequilibrium in Small-tailed Han sheep population (P<0.05).rs129059715 was low polymorphic in Dupo and Small-tailed Han sheep populations (PIC<0.25), and was moderately polymorphic in Tan and Dupo×Tan×Small-tailed Han sheep populations (0.25<PIC<0.50).Association analysis revealed that the backfat thickness and trans-linoleic acid content of CA genotype at rs129059715 were extremely significantly higher than that of CC genotype (P<0.01), the net meat percentage, kidney weight, the contents of fat, undecanoic acid, decanoic acid and decanoic acid of CA genotype were significantly higher than that of CC genotype (P<0.05).The muscle fibre diameter of CC genotype was significantly higher than that of AA genotype (P<0.05), pH of CC genotype was significantly higher than that of CA genotype (P<0.05).There were no significant differences with other traits among different genotypes (P>0.05).【Conclusion】 Through liquid phase capture sequencing technology, rs129059715 of MSTN gene with significant differences was obtained, which had significant effects on the slaughter performance, meat quality and fatty acid content of sheep.rs129059715 could be used as a potential candidate marker for meat production performance and meat quality.

Key words: sheep; MSTN gene; polymorphism; slaughter performance; meat quality

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