›› 2019, Vol. 46 ›› Issue (3): 792-799.doi: 10.16431/j.cnki.1671-7236.2019.03.018

• Genetics and Breeding • Previous Articles     Next Articles

Association Between Polymorphism of MC4R and CDC16 Genes and Growth Traits in Large White Pigs

ZHAO Congzhe1,2, LUO Xiaotong2, LI Zhaohua2, ZHANG Zhibin2, YU Yongsheng2   

  1. 1. Agricultural College of Yanbian University, Yanji 133002, China;
    2. Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China
  • Received:2018-08-08 Online:2019-03-20 Published:2019-03-20

Abstract:

This study was aimed to detect the polymorphism of melanocortin-4 receptor (MC4R) and cell division cycle protein 16 (CDC16) in Large White pigs by HRM typing,and analyze its association with growth traits in Large White pigs.A total of 246 Large White pigs ear tissues were collected as research objects,DNA was extracted using the AxyPrep Genomic DNA Extraction Kit.After PCR amplification of small population samples,the polymorphic positions of MC4R and CDC16 genes in the population were searched by sequencing.According to the findings,the polymorphic sites were designed for HRM-specific primers.The HRM method was used to detect the polymorphism in large populations,and the results were correlated with growth traits in Large White pigs.The results showed that one mutation site 2207A>G,two alleles (A and G) and three genotypes (AA,AG and GG) were detected in the MC4R gene sequence.There was a mutation site 837T>C,two alleles (T and C),two genotypes (TT and CT) in the 18th exon of CDC16 gene.The χ2 test results showed that the genotype frequency and gene frequency of MC4R and CDC16 genes were not significant difference between the two populations,which was consistent with the Hardy-Weinberg equilibrium (P>0.05).The polymorphic information content (PIC) result showed that MC4R gene was moderate polymorphic (0.25<PIC<0.5),and CDC16 gene was low polymorphic (PIC<0.25) in both populations.The correlation analysis results showed that MC4R gene had significant effects on body weight and daily gain in Large White pigs (P<0.05),CDC16 gene had significant effects on body height,body length and body weight (P<0.05).In summary,MC4R and CDC16 genes had certain effects on the growth and development of Large White pigs,which provided a reference for the modern molecular breeding of meat quality and growth traits in Large White pigs.

Key words: Large White pigs; MC4R gene; CDC16 gene; polymorphism; high resolution melt

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