Genomic analyses reveal distinct genetic architectures and selective pressures in buffaloes
文献类型： 外文期刊
作者： Sun, Ting 1 ; Shen, Jiafei 1 ; Achilli, Alessandro 2 ; Chen, Ningbo 1 ; Chen, Qiuming 1 ; Dang, Ruihua 1 ; Zheng, Zhuq 1 ;
作者机构： 1.Northwest A&F Univ, Coll Anim Sci & Technol, Key Lab Anim Genet Breeding & Reprod Shaanxi Prov, Yangling 712100, Shaanxi, Peoples R China
2.Univ Pavia, Dipartimento Biol & Biotecnol L Spallanzani, I-27100 Pavia, Italy
3.Yunnan Univ, Key Lab Plateau Lake Ecol & Environm Change, Kunming 650504, Yunnan, Peoples R China
4.Chinese Acad Sci, Kunming Inst Zool, State Key Lab Genet Resources & Evolut, Kunming 650223, Yunnan, Peoples R China
5.Shaanxi Univ Technol, Sch Biosci & Engn, Hanzhong 723000, Shaanxi, Peoples R China
6.Ningxia Univ, Agr Coll, Yinchuan 750021, Ningxia, Peoples R China
7.Anhui Acad Agr Sci, Inst Anim Sci & Vet Med, Hefei 230001, Peoples R China
关键词： buffalo; whole-genome resequencing; genetic history; selection
期刊名称：GIGASCIENCE （ 影响因子：6.524； 五年影响因子：8.702 ）
ISSN： 2047-217X
年卷期： 2020 年 9 卷 2 期
页码：
收录情况： SCI
摘要： Background: The domestic buffalo (Bubalus bubalis) is an essential farm animal in tropical and subtropical regions, whose genomic diversity is yet to be fully discovered. Results: In this study, we describe the demographic events and selective pressures of buffalo by analyzing 121 whole genomes (98 newly reported) from 25 swamp and river buffalo breeds. Both uniparental and biparental markers were investigated to provide the final scenario. The ancestors of swamp and river buffalo diverged similar to 0.23 million years ago and then experienced independent demographic histories. They were domesticated in different regions, the swamp buffalo at the border between southwest China and southeast Asia, while the river buffalo in south Asia. The domestic stocks migrated to other regions and further differentiated, as testified by (at least) 2 ancestral components identified in each subspecies. Different signals of selective pressures were also detected in these 2 types of buffalo. The swamp buffalo, historically used as a draft animal, shows selection signatures in genes associated with the nervous system, while in river dairy breeds, genes under selection are related to heat stress and immunity. Conclusions: Our findings substantially expand the catalogue of genetic variants in buffalo and reveal new insights into the evolutionary history and distinct selective pressures in river and swamp buffalo.
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