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Detection of selection signatures in South African Mutton Merino sheep using whole-genome sequencing data

文献类型： 外文期刊

作者： Liu, Zhengxi 1 ; Bai, Chunyan 1 ; Shi, Lulu 1 ; He, Yu 1 ; Hu, Mingyue 1 ; Sun, Hao 1 ; Peng, Hongyang 1 ; Lai, Weining 1 ; Jiao, Shuyu 1 ; Zhao, Zhongli 2 ; Ma, Huihai 2 ; Yan, Shouqing 1 ;

作者机构： 1.Jilin Univ, Coll Anim Sci, Changchun, Peoples R China

2.Jilin Acad Agr Sci, Inst Anim Husb & Vet, Gongzhuling, Jilin, Peoples R China

关键词： carcass trait; growth; SAMM; selection signature; whole-genome resequencing

期刊名称：ANIMAL GENETICS （ 影响因子：2.884； 五年影响因子：2.92 ）

ISSN： 0268-9146

年卷期： 2022 年 53 卷 2 期

页码：

收录情况： SCI

摘要： The South African Mutton Merino (SAMM), a dual-purpose (meat and wool) sheep breed, is characterized by its excellent performance on growth, carcass traits and meat quality compared to other fine-wool Merino breeds. Nowadays, the SAMM breed has been widely used to cross with commercial and indigenous fine-wool or coarse-wool breeds to improve the growth and meat performance in many countries. To date, however, little is known about the genetic basis for its prominent characteristics. In this study, whole-genome sequences of 10 SAMM were sequenced and the selection signatures were analyzed together with those of 39 Australian Merino and Chinese Merino (wool-type Merino) by F-ST, iHS, and XP-EHH methods. In total, 313 genes in 277 regions were identified by at least 2 methods with the signal of selection and 21 of them were identified by all three methods. We highlighted a list of interesting genes, including GHR, LCORL, SMO, NCAPG, DCC, IBSP, PPARGC1A, PACRGL, PRDM5, XYLB, AHCYL2, TEFM, AFG1L, and FAM184B, which have been shown to be involved in growth, carcass traits, and meat quality by previous studies. Herein, GHR, encoding a transmembrane receptor for growth hormone, is the most notable one. We report the first study on selection signatures analysis of SAMM at whole-genome sequence level. These results provide new insights into the genetic mechanisms underlying the growth and carcass traits in SAMM.

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