China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (4): 1461-1471.doi: 10.16431/j.cnki.1671-7236.2023.04.018

• Genetics and Breeding • Previous Articles     Next Articles

Polymorphism of MyoG Gene and Its Association with Body Size and Meat Traits in White Feather King Pigeons

TAN Yuancheng1,2, LUO Hualun1,2,3, ZHANG Yiyu1,2, YANG Suan1,2, WANG Yingtong1,2, WANG Chunyuan1,2   

  1. 1. Key Laboratory of Genetics, Breeding and Reproduction of Plateau Mountain Animals, Ministry of Education, Guizhou University, Guiyang 550025, China;
    2. College of Animal Science, Guizhou University, Guiyang 550025, China;
    3. Agriculture and Rural Bureau of Qianxinan Prefecture, Xingyi 562400, China
  • Online:2023-04-05 Published:2023-04-06

Abstract: 【Objective】 The purpose of this experiment was to study the polymorphism of myogenin (MyoG) gene and its relationship with body size and meat quality traits in White feather King pigeons,and provide reference for the breeding of molecular markers in this breed.【Method】 A total of 108 12-week-old White feather King pigeons were selected as the research objects,PCR and direct sequencing were used to screen the SNP of MyoG gene in White feather King pigeons,RNAfold was used to predict the mRNA secondary structure before and after MyoG gene mutation,and SPSS 26.0 software was used to analyze the correlation between SNP of MyoG gene and body size and meat quality traits of White feather King pigeons.【Result】 Four SNPs were detected in exon 3 of MyoG gene in White feather King pigeons:g.590075 C>T,g.590084 G>A,g.590102 G>A and g.590114 C>T,all of which were synonymous mutations and resulted in three genotypes,among them,g.590075 C>T belonged to low polymorphism,the other 3 SNPs showed moderate polymorphism.χ2 results showed that g.590084 G>A and g.590114 C>T were in Hardy-Weinberg equilibrium (P>0.05),and there was strong linkage disequilibrium between the two SNPs.The mutations of g.590084 G>A and g.590102 G>A resulted in the change of secondary structure and free energy of MyoG gene mRNA sequence.The combination of 4 SNPs produced 4 haplotypes and 9 diplotypes.The results of correlation analysis showed that g.590075 C>T was extremely significantly associated with keel length in White feather King pigeons (P<0.01);g.590102 G>A had an extremely significant effect on body length (P<0.01).The body length of H3H3 (CCAAAACC) individuals were superior to the other diplotypes,and the keel length and chest width of H4H4 (TTGGGGCC) individuals were superior to the other diplotypes.g.590084 G>A and g.590114 C>T were extremely significantly or significantly associated with pectoral muscle shear force (P<0.01 or P<0.05).The diplotype H3H3 (CCAAAACC) individuals were better than the other diplotypes in pH and flesh color of chest muscle,while in the shear force and water loss rate,the diplotype H2H4 (CTGAGGCT) and H4H4 (TTGGGGCC) performed better.【Conclusion】 MyoG gene had significant effect on some body size and meat quality traits in White feather King pigeons,which could be used as a candidate gene for breeding new lines in White feather King pigeons.

Key words: White feather King pigeons; MyoG gene; polymorphism; body size trait; meat quality trait; association analysis

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