Using High-Density SNP Array to Reveal Selection Signatures Related to Prolificacy in Chinese and Kazakhstan Sheep Breeds
文献类型： 外文期刊
作者： Wang, Yi 1 ; Niu, Zhigang 2 ; Zeng, Zhengcheng 1 ; Jiang, Yao 1 ; Jiang, Yifan 1 ; Ding, Yugong 2 ; Tang, Sen 2 ; Shi, Ho 1 ;
作者机构： 1.China Agr Univ, Coll Anim Sci & Technol, Natl Engn Lab Anim Breeding, Lab Anim Genet Breeding & Reprod,Minist Agr, Beijing 100193, Peoples R China
2.PRC Xinjiang Acad Anim Sci, Key Lab Reprod & Breeding Biotechnol Grass Feedin, Urumqi 830000, Peoples R China
关键词： selection signatures; sheep; litter size; SNP
期刊名称：ANIMALS （ 影响因子：2.752； 五年影响因子：2.942 ）
ISSN： 2076-2615
年卷期： 2020 年 10 卷 9 期
页码：
收录情况： SCI
摘要： Simple Summary Genetic improvement of litter size trait in domestic animals is an appealing way to improve production efficiency. In our study, the selection signatures between multiparous and uniparous sheep populations are identified, so that potential pathways and candidate genes related to litter size were screened out. Our findings help better understand the mechanisms of selection underlying the prolificacy trait in sheep and other mammals. Selection signature provides an efficient tool to explore genes related to traits of interest. In this study, 176 ewes from one Chinese uniparous breed and three Kazakhstan multiparous breeds are genotyped using Affymetrix 600K HD single nucleotide polymorphism (SNP) arrays, F-statistics (Fst), and a Cross Population Extend Haplotype Homozygosity Test (XPEHH). These are conducted to identify genomic regions that might be under selection in three population pairs comprised the one multiparous breed and the uniparous breed. A total of 177 and 3072 common selective signatures were identified by Fst and XPEHH test, respectively. Nearly half of the common signatures detected by Fst were also captured by XPEHH test. In addition, 1337 positive and 1735 common negative signatures were observed by XPEHH in three Kazakhstan multiparous breeds. In total, 242 and 798 genes were identified in selective regions and positive selective regions identified by Fst and XPEHH, respectively. These genes were further clustered in 50 gene ontology (GO) functional terms and 66 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways in enrichment analysis. The GO terms and pathways were relevant with reproductive processes, e.g., oxytocin signaling pathway, thyroid hormone synthesis and GnRH signaling pathway, vascular smooth muscle contraction and lipid metabolism (alpha-Linolenic acid metabolism and Linoleic acid metabolism), etc. Based on the findings, six potential candidate genesESR1,OXTR,MAPK1,RYR1,PDIA4, andCYP19A1, under positive selection related to characteristics of multiparous sheep breeds were revealed. Our results improve our understanding of the mechanisms of selection that underlies the prolificacy trait in sheep, and provide essential references for future sheep breeding.
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