ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (11): 1775-1783.doi: 10.11843/j.issn.0366-6964.2014.11.006

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Genome-wide Association Study on Identifying Susceptibility Loci for Pig Inguinal/scrotal Hernia

RUAN Guo-rong2,LONG Yi1,SU Ying1,ZHANG Zhi-yan1,XIAO Shi-jun1,LIAO Xin-jun1,3,AI Hua-shui1,YANG Bin1,DENG Zheng1,XIN Wen-shui1,TANG Jian-hong1,REN Jun1,DING Neng-shui1*,HUANG Lu-sheng1   

  1. (1.Candidate of National Key Laboratory for Animal Biotechnology,Jiangxi Agricultural University,Nanchang 330045,China;2.Fujian Vocational College of Agriculture,Fuzhou 350119,China;3.College of Life Science of Jinggangshan University,Ji’an 343009,China)
  • Received:2014-03-26 Online:2014-11-23 Published:2014-11-23

Abstract:

To identify susceptibility genes susceptible for pig inguinal/scrotal hernia and further reveal the pathogenesis mechanisms of the disorder,734 commercial purebred pigs(237 cases in 220 trio families) containing Landrace and Large White breeds were collected and genotyped with Illumina Porcine 60k SNP chips.The genome-wide association studies (GWAS) based on the single-marker case-control model was used to identy SNPs related to pig inguinal/scrotal hernia.Four significant SNPs in a region of 19.31-19.59 Mb on SSC1 and a SNP at 17.05 Mb on SSC7 which showed significant association with pig inguinal/scrotal hernia.The UST gene within the susceptible region on SSC1 was responsible for biosynthesis of dermatan sulfate glycosaminoglycan that had been shown to be associated with human mucopolysaccharidosis accompanying several type of hernia.CDKAL1 corresponding to the SSC7 locus might affect the occurrence of hernia through the function on cell death.Only MARC0077275 in CDKAL1 was verified using transmission disequilibrium test (TDT) in an expanded population including 1 134 individuals containing 367 individuals with inguinal/scrotal hernia.In summary,this study identified 5 susceptible loci and 2 candidate genes for pig inguinal/scrotal hernia by GWAS,one of which was also verified in a larger population by TDT analysis.These findings provide novel insight into the molecular and genetic basis of inguinal/scrotal hernia in pigs.

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