Origin and population structure of Brazilian hair sheep breeds

被引：11
|
作者：
Paim, T. P. [1 ,2 ]
Paiva, S. R. [3 ]
de Toledo, N. M. [1 ]
Yamaghishi, M. B. [4 ]
Carneiro, P. L. S. [5 ]
Faco, O. [6 ]
de Araujo, A. M. [7 ]
Azevedo, H. C. [8 ]
Caetano, A. R. [3 ]
Braga, R. M. [9 ]
McManus, C. [10 ]
机构：
[1] Univ Brasilia, Fac Agron & Med Vet, Campus Darcy Ribeiro, BR-70910900 Brasilia, DF, Brazil
[2] Inst Fed Educ Ciencia & Tecnol Goiano, BR-76200000 Ipora, Go, Brazil
[3] Embrapa Recursos Genet & Biotecnol, BR-70770917 Brasilia, DF, Brazil
[4] Embrapa Informat Agr, BR-13083886 Campinas, SP, Brazil
[5] Univ Estadual Sudoeste Bahia, Dept Ciencias Biol, BR-45205490 Jequie, BA, Brazil
[6] Embrapa Caprinos & Ovinos, BR-62010970 Sobral, Ceara, Brazil
[7] Embrapa Meio Norte, BR-64008780 Teresina, PA, Brazil
[8] Embrapa Tabuleiros Costeiros, BR-49025040 Aracaju, Sergipe, Brazil
[9] Embrapa Roraima, BR-69301970 Boa Vista, Parana, Brazil
[10] Univ Brasilia, Inst Biol, BR-70910900 Brasilia, DF, Brazil
来源：
ANIMAL GENETICS | 2021年 / 52卷 / 04期
关键词：
animal genetic resources; conservation genetics; genomics; migration; molecular markers; Ovis aries; ANIMAL GENETIC-RESOURCES; GENOME-WIDE ANALYSIS; CONSERVATION; DIVERSITY; SELECTION; HISTORY;
D O I：
10.1111/age.13093
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
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 Ines 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.
引用
收藏
页码：492 / 504
页数：13
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