Genetic diversity,population structure,and correlations between locally adapted zebu and taurine breeds in Brazil using SNP markers |
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| Authors: | Bárbara Machado Campos Adriana Santana do Carmo Andrea Alves do Egito Arthur Silva da Mariante Maria Socorro Muaés do Albuquerque João José Simoni de Gouveia Carlos Henrique Mendes Malhado Lucas Lima Verardo Marcos Vinícius Gualberto Barbosa da Silva Paulo Luiz Souza Carneiro |
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| Institution: | 1.Graduate Program of Animal Science,Universidade Estadual do Sudoeste da Bahia,Itapetinga,Brazil;2.Vitória da Conquista,Brazil;3.Universidade Federal Goiás,Goiania,Brazil;4.Brazilian Agricultural Research Corporation (Embrapa Genetic Resources and Biotechnology),Brasília,Brazil;5.Brazilian Agricultural Research Corporation (Embrapa Beef Cattle),Campo Grande,Brazil;6.Universidade Federal do Vale do S?o Francisco,Petrolina,Brazil;7.Universidade Estadual do Sudoeste da Bahia,Jequié,Brazil;8.Brazilian Agricultural Research Corporation (Embrapa Dairy Cattle),Juiz de Fora,Brazil |
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| Abstract: | Genetic diversity is one of the most important issues in studies on conservation of cattle breeds and endangered species. The objective of this study was to estimate the levels of genetic differentiation between locally adapted taurine (Bos taurus taurus) and zebu (Bos taurus indicus) breeds in Brazil, which were genotyped for more than 777,000 SNPs. The fixation index (F ST), principal component analysis (PCA), and Bayesian clustering were estimated. The F ST highlighted genetic differentiation between taurine and zebu breeds. The taurine lines, Caracu and Caracu Caldeano, had significant genetic differentiation (F ST close to 5%) despite their recent selection for different uses (meat and milk). This genetic variability can be used for conservation of locally adapted animals, as well as for breeding programs on zebu breeds. Introgression of zebu in locally adapted breeds was identified, especially in Curraleiro Pé-Duro breed. The Gyr breed, however, had low breed purity at genomic level due to its very heterogeneous mixing pattern. |
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