China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (6): 2186-2194.doi: 10.16431/j.cnki.1671-7236.2022.06.019

• Genetics and Breeding • Previous Articles     Next Articles

Polymorphism of PDK4 Gene and Its Association with Meat Quality Traits in Chinese Steppe Red Cattle

MA Yanru1,2, YU Yongsheng2, CAO Yang2, QIN Lihong2, ZHAO Yumin2,3,4,5, WU Jian2,3,4,5   

  1. 1. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China;
    2. Jilin Academy of Agricultural Sciences, Gongzhuling 130033, China;
    3. Key Laboratory of Beef Cattle Genetics and Breeding, Ministry of Agriculture and Rural Affairs, Gongzhuling 136100, China;
    4. Northeast Cattle Performance Testing Center, Ministry of Agriculture and Rural Affairs, Gongzhuling 136100, China;
    5. Jilin Beef Cattle Breeding and Breeding Technology Innovation Center, Gongzhuling 136100, China
  • Received:2021-10-31 Online:2022-06-05 Published:2022-05-27

Abstract: 【Objective】 The aim of the expriment was to study on the relationship between PDK4 gene polymorphism and meat quality traits in Chinese Steppe Red cattle.【Method】 120 Chinese Steppe Red cattle were selected as the research object.The single nucleotide polymorphism (SNP) of exons 1-11 of PDK4 gene was detected by Sanger sequencing, and the genotype frequency, gene frequency and population genetic parameters of SNP were analyzed.SPSS 21.0 software was used to analyze the association between SNP polymorphism of PDK4 gene and meat quality traits (cooked meat rate, meat tenderness, water loss rate, pH, drip loss, intramuscular fat content, initial water content and protein content) in Chinese Steppe Red cattle.【Result】 Three SNPs were detected in exons 8 and 11 of PDK4 gene in Chinese Steppe Red cattle.There was a SNP site at 57 bp (G57C) in exon 8 of PDK4 gene, which caused the change of coding amino acids.There were GG, GC and CC genotypes at G57C site.There were two SNPs at 330 bp(G330T) and 389 bp(C389T) in exon 11 of PDK4 gene.There were three genotypes of GG, GT and TT at G330T and three genotypes CC, CT and TT at C389T.Chi-square test results showed that the G57C site of exon 8 of Chinese Steppe Red cattle deviated from Hardy-Weinberg equilibrium (P<0.05), and the G330T and C398T of exon 11 conformed to Hardy-Weinberg equilibrium (P>0.05).The analysis of population genetic parameters showed that the G57C site in exon 8 belonged to low degree polymorphism (PIC<0.25), and the number of alleles was 1.1429, indicating that it had little variation in Chinese Steppe Red cattle.Exon 11 G330T and C398T belong to moderate polymorphism sites (0.25<PIC<0.5), and the number of alleles were 1.6431 and 1.6447 respectively, indicating that the genetic marker could provide genetic information.The association analysis results showed that the intramuscular fat content of GG and CC genotypes at G57C site in exon 8 of PDK4 gene was significantly higher than that of GC genotype (P<0.05).The drip loss and initial water component of GG genotype at G330T in exon 11 were significantly higher than those of GT genotype (P<0.05).The meat tenderness of GG genotype was significantly higher than that of TT genotype (P<0.05).The intramuscular fat content of GT genotype was significantly higher than that of TT genotype (P<0.05), and the dehydration rate of CT genotype at C389T was significantly lower than that of TT genotype (P<0.05).【Conclusion】 PDK4 gene polymorphism was associated with meat quality traits in Chinese Steppe Red cattle, and could be used as a candidate gene for meat quality traits.

Key words: PDK4 gene; Chinese Steppe Red cattle; meat quality traits; polymorphism; association analysis

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