A meta-analysis of genome-wide association studies for average daily gain and lean meat percentage in two Duroc pig populations
文献类型： 外文期刊
作者： Zhou, Shenping 1 ; Ding, Rongrong 1 ; Meng, Fanming 3 ; Wang, Xingwang 1 ; Zhuang, Zhanwei 1 ; Quan, Jianping 1 ; Geng 1 ;
作者机构： 1.South China Agr Univ, Coll Anim Sci, Guangzhou 510642, Guangdong, Peoples R China
2.South China Agr Univ, Natl Engn Res Ctr Breeding Swine Ind, Guangzhou 510642, Guangdong, Peoples R China
3.Guangdong Acad Agr Sci, Inst Anim Sci, State Key Lab Livestock & Poultry Breeding, Guangdong Key Lab Anim Breeding & Nutr, Guangzhou 510640, Guangdong, Peoples R China
4.YueYang Vocat Tech Coll, Yueyang 414000, Hunan, Peoples R China
关键词： Pigs; Lean meat percentage; Average daily gain; GWAS; Meta-analysis
期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）
ISSN： 1471-2164
年卷期： 2021 年 22 卷 1 期
页码：
收录情况： SCI
摘要： Background: Average daily gain (ADG) and lean meat percentage (LMP) are the main production performance indicators of pigs. Nevertheless, the genetic architecture of ADG and LMP is still elusive. Here, we conducted genome-wide association studies (GWAS) and meta-analysis for ADG and LMP in 3770 American and 2090 Canadian Duroc pigs. Results: In the American Duroc pigs, one novel pleiotropic quantitative trait locus (QTL) on Sus scrofa chromosome 1 (SSC1) was identified to be associated with ADG and LMP, which spans 2.53 Mb (from 159.66 to 162.19 Mb). In the Canadian Duroc pigs, two novel QTLs on SSC1 were detected for LMP, which were situated in 3.86 Mb (from 157.99 to 161.85 Mb) and 555 kb (from 37.63 to 38.19 Mb) regions. The meta-analysis identified ten and 20 additional SNPs for ADG and LMP, respectively. Finally, four genes (PHLPP1, STC1, DYRK1B, and PIK3C2A) were detected to be associated with ADG and/or LMP. Further bioinformatics analysis showed that the candidate genes for ADG are mainly involved in bone growth and development, whereas the candidate genes for LMP mainly participated in adipose tissue and muscle tissue growth and development. Conclusions: We performed GWAS and meta-analysis for ADG and LMP based on a large sample size consisting of two Duroc pig populations. One pleiotropic QTL that shared a 2.19 Mb haplotype block from 159.66 to 161.85 Mb on SSC1 was found to affect ADG and LMP in the two Duroc pig populations. Furthermore, the combination of single-population and meta-analysis of GWAS improved the efficiency of detecting additional SNPs for the analyzed traits. Our results provide new insights into the genetic architecture of ADG and LMP traits in pigs. Moreover, some significant SNPs associated with ADG and/or LMP in this study may be useful for marker-assisted selection in pig breeding.
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