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Fan R, Gu Z, Guang X, Marín JC, Varas V, González BA, Wheeler JC, Hu Y, Li E, Sun X, Yang X, Zhang C, Gao W, He J, Munch K, Corbett-Detig R, Barbato M, Pan S, Zhan X, Bruford MW, Dong C. Genomic analysis of the domestication and post-Spanish conquest evolution of the llama and alpaca. Genome Biol 2020; 21:159. [PMID: 32616020 PMCID: PMC7331169 DOI: 10.1186/s13059-020-02080-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 06/21/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Despite their regional economic importance and being increasingly reared globally, the origins and evolution of the llama and alpaca remain poorly understood. Here we report reference genomes for the llama, and for the guanaco and vicuña (their putative wild progenitors), compare these with the published alpaca genome, and resequence seven individuals of all four species to better understand domestication and introgression between the llama and alpaca. RESULTS Phylogenomic analysis confirms that the llama was domesticated from the guanaco and the alpaca from the vicuña. Introgression was much higher in the alpaca genome (36%) than the llama (5%) and could be dated close to the time of the Spanish conquest, approximately 500 years ago. Introgression patterns are at their most variable on the X-chromosome of the alpaca, featuring 53 genes known to have deleterious X-linked phenotypes in humans. Strong genome-wide introgression signatures include olfactory receptor complexes into both species, hypertension resistance into alpaca, and fleece/fiber traits into llama. Genomic signatures of domestication in the llama include male reproductive traits, while in alpaca feature fleece characteristics, olfaction-related and hypoxia adaptation traits. Expression analysis of the introgressed region that is syntenic to human HSA4q21, a gene cluster previously associated with hypertension in humans under hypoxic conditions, shows a previously undocumented role for PRDM8 downregulation as a potential transcriptional regulation mechanism, analogous to that previously reported at high altitude for hypoxia-inducible factor 1α. CONCLUSIONS The unprecedented introgression signatures within both domestic camelid genomes may reflect post-conquest changes in agriculture and the breakdown of traditional management practices.
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Affiliation(s)
- Ruiwen Fan
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi China
| | - Zhongru Gu
- CAS Key Lab of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Cardiff University – Institute of Zoology Joint Laboratory for Biocomplexity Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | | | - Juan Carlos Marín
- Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad del Bio Bio, Chillán, Chile
| | - Valeria Varas
- Programa de Doctorado en Ciencias mención Ecología y Evolución, Escuela de Graduados, Facultad de Ciencias., Universidad Austral de Chile, Valdivia, Chile
| | - Benito A. González
- Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Universidad de Chile, Santiago, Chile
| | - Jane C. Wheeler
- CONOPA-Instituto de Investigación y Desarrollo de Camélidos Sudamericanos, Pachacamac, Lima, Peru
| | - Yafei Hu
- BGI Genomics, BGI, Shenzhen, China
| | - Erli Li
- BGI Genomics, BGI, Shenzhen, China
| | | | | | | | - Wenjun Gao
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi China
| | - Junping He
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi China
| | - Kasper Munch
- Bioinformatics Research Centre, Aarhus University, Aarhus, Denmark
| | - Russel Corbett-Detig
- Department of Biomolecular Engineering and Genomics Institute, UC Santa Cruz, Santa Cruz, CA USA
| | - Mario Barbato
- Department of Animal Science, Food and Technology – DIANA, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Shengkai Pan
- CAS Key Lab of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Cardiff University – Institute of Zoology Joint Laboratory for Biocomplexity Research, Chinese Academy of Sciences, Beijing, China
| | - Xiangjiang Zhan
- CAS Key Lab of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Cardiff University – Institute of Zoology Joint Laboratory for Biocomplexity Research, Chinese Academy of Sciences, Beijing, China
- Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China
| | - Michael W. Bruford
- Cardiff University – Institute of Zoology Joint Laboratory for Biocomplexity Research, Chinese Academy of Sciences, Beijing, China
- School of Biosciences and Sustainable Places Institute, Cardiff University, Cardiff, Wales UK
| | - Changsheng Dong
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi China
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