Origin and population structure of Brazilian hair sheep breeds.

Paim, T P; Paiva, S R; de Toledo, N M; Yamaghishi, M B; Carneiro, P L S; Facó, O; de Araújo, A M; Azevedo, H C; Caetano, A R; Braga, R M; McManus, C

Paim, T P; Paiva, S R; de Toledo, N M; Yamaghishi, M B; Carneiro, P L S; Facó, O; de Araújo, A M; Azevedo, H C; Caetano, A R; Braga, R M; McManus, C.

Afiliación

Paim TP; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Darcy Ribeiro, Brasília, Distrito Federal, 70910-900, Brazil.
Paiva SR; Instituto Federal de Educação, Ciência e Tecnologia Goiano, Iporá, Goiás, 76200-000, Brazil.
de Toledo NM; Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal, 70770-917, Brazil.
Yamaghishi MB; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Darcy Ribeiro, Brasília, Distrito Federal, 70910-900, Brazil.
Carneiro PLS; Embrapa Informática Agropecuária, Campinas, São Paulo, 13083-886, Brazil.
Facó O; Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Jequié, Bahia, 45205-490, Brazil.
de Araújo AM; Embrapa Caprinos e Ovinos, Sobral, Ceará, 62010-970, Brazil.
Azevedo HC; Embrapa Meio-Norte, Teresina, Piaui, 64008-780, Brazil.
Caetano AR; Embrapa Tabuleiros Costeiros, Aracaju, Sergipe, 49025-040, Brazil.
Braga RM; Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal, 70770-917, Brazil.
McManus C; Embrapa Roraima, Boa Vista, Roraima, 69301-970, Brazil.

Anim Genet ; 52(4): 492-504, 2021 Aug.

Article en En | MEDLINE | ID: mdl-34087001

RESUMEN

Brazilian hair sheep constitute a genetic diversity hotspot. These animals are found in the harsh environments of the Brazilian Northwest (semi-arid) region. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (five hair and two coarse wool types) and 87 worldwide breeds were used to test for population structure, admixture and genetic diversity. Moreover, phylogenetic trees evaluating migration events between genetic groups were built. Brazilian Somali, a fat-tailed breed, had a close relationship with East African breeds and clustered distinctly from other Brazilian breeds. Brazilian Blackbelly and Barbados Blackbelly had a close relationship. The Morada Nova breed did not show close relationships with European or African breeds, revealing a single migration event from an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the former showed introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. The Santa Inês breed received a substantial contribution from Brazilian Bergamasca and showed an admixed origin with recent introgressions from other breeds, mainly from Suffolk. Furthermore, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil and should be the focus for ex situ conservation programs. In conclusion, Brazilian hair sheep show an African origin and are characterized by diverse genetic composition, reinforcing the need for conservation of these genetic resources, and at the same time, this highly diverse group has variability that can be used in breeding programs.

Asunto(s)

Pelaje de Animal; Cruzamiento; Genoma; Genotipo; Oveja Doméstica/genética; Pelaje de Animal/fisiología; Animales; Brasil; Filogenia

Palabras clave

Ovis aries; animal genetic resources; conservation genetics; genomics; migration; molecular markers

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cruzamiento / Genoma / Oveja Doméstica / Pelaje de Animal / Genotipo Límite: Animals País/Región como asunto: America do sul / Brasil Idioma: En Revista: Anim Genet Asunto de la revista: GENETICA / MEDICINA VETERINARIA Año: 2021 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido

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