Genome-wide association studies revealed candidate genes for tail fat deposition and body size in the Hulun Buir sheep

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DOI

  • Tongyu Zhang, Chinese Academy of Agricultural Sciences
  • ,
  • Hongding Gao
  • Goutam Sahana
  • Yanjun Zan, Uppsala universitet
  • ,
  • Hongying Fan, Chinese Academy of Agricultural Sciences
  • ,
  • Jiaxin Liu, Chinese Academy of Agricultural Sciences
  • ,
  • Liangyu Shi, Chinese Academy of Agricultural Sciences
  • ,
  • Jiqiang Liu, Ltd
  • ,
  • Lixin Du, Chinese Academy of Agricultural Sciences
  • ,
  • Lixian Wang, Chinese Academy of Agricultural Sciences
  • ,
  • Fuping Zhao, Chinese Academy of Agricultural Sciences

Fat-tailed sheep have a unique characteristic of depositing fat in their tails. In the present study, we conducted genome-wide association studies (GWAS) on traits related to tail fat deposition and body size in the Hulun Buir sheep. A total number of 300 individuals belonging to two fat-tailed lines of the Hulun Buir sheep breed genotyped with the Ovine Infinium HD SNP BeadChip were included in the current study. Two mixed models, one for continuous and one for binary phenotypic traits, were employed to analyse ten traits, that is, body length (BL), body height (BH), chest girth (CG), tail length (TL), tail width (TW), tail circumference (TC), carcass weight (CW), tail fat weight (TF), ratio of CW to TF (RCT) and tail type (TT). We identified 7, 6, 7, 2, 10 and 1 SNPs significantly associated with traits TF, CW, RCT, TW, TT and CG, respectively. Their associated genomic regions harboured 42 positional candidate genes. Out of them, 13 candidate genes including SMURF2, FBF1, DTNBP1, SETD7 and RBM11 have been associated with fat metabolism in sheep. The RBM11 gene has already been identified in a previous study on signatures of selection in this specific sheep population. Two more genes, that is, SMARCA5 and GAB1 were associated with body size in sheep. The present study has identified candidate genes that might be implicated in tail fat deposition and body size in sheep.

OriginalsprogEngelsk
TidsskriftJournal of Animal Breeding and Genetics
ISSN0931-2668
DOI
StatusE-pub ahead of print - maj 2019

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