Data/hora: 17/06/2024 08:21:32

Biblioteca(s): | Embrapa Meio-Norte; Embrapa Recursos Genéticos e Biotecnologia.
Data corrente: | 30/11/2015
Data da última atualização: | 25/05/2022
Autoria: | CARVALHO, G. M. C.; PAIVA, S. R.; ARAUJO, A. M. de; MARIANTE, A. da S.; BLACKBURN, H. D.
Afiliação: | GERALDO MAGELA CORTES CARVALHO, CPAMN; SAMUEL REZENDE PAIVA, SRI; ADRIANA MELLO DE ARAUJO, CPAMN; ARTHUR DA SILVA MARIANTE, CENARGEN; H. D. Blackburn, National Animal Germplasm Program, Agricultural Research Service, USDA, Fort Collins, CO 80521.
Título: | Genetic structure of goat breeds from Brazil and the United States: Implications for conservation and breeding programs
Ano de publicação: | 2015
Fonte/Imprenta: | Journal of Animal Science, Madison, v. 93, n. 10, p. 4629-4636, Sep. 2015.
ISSN: | 0021-8812
DOI: | 10.2527/jas.2015-8974
Idioma: | Inglês
Conteúdo: | The objective of this study was to assess genetic diversity among 5 Brazilian (155 animals) and 5 U.S. goat (120 animals) breeds using 23 microsatellite markers. Samples from the United States represented a broad geographic distribution whereas Brazilian samples were from the northeast region. Samples from Boer were common to each country?s breed count. Expected and observed heterozygosity among breeds ranged from 0.55 to 0.72, suggesting ample genetic diversity in the breeds evaluated. United States Angora, U.S. Spanish, and Brazilian Nambi ranked highest for allelic richness, averaging 6.1, 7.1, and 6.5 alleles per locus, respectively. Angora and Spanish also ranked highest in private alleles (7 and 9, respectively). Using STRUCTURE, the U.S. Spanish were also found to share a common cluster assignment with Brazilian Nambi, suggesting that progenitor breeds may have been the same and passed through the Canary Islands or Cape Verde in route to the New World. When non-Boer breeds were pooled by country, the effect of the subpopulation compared with total population (Fst) = 0.05, suggesting minor genetic differences exist between countries. The lack of genetic structure among goat breeds when compared with other species (e.g., Bos taurus vs. Bos indicus) suggests goat breeds may exhibit a plasticity that facilitates productivity across a wide range of countries and environments. Taken a step further, the concept of breed for meat goats may not be as relevant for goat production.
Palavras-Chave: | Breeding strategies; Conservação genética; Conservation genetics; Diversidade genética; Estratégia de melhoramento; Genetic diversity; Goat.
Thesagro: | Cabra; Capra Hircus.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Meio-Norte (CPAMN)

Exemplares:

CPAMN - (31134-1) - UPC - AP - PP -  -  - SP 66/2015 - DIS
CENARGEN - (36166-1) - UPC - AP - DD - SP 20830 -  - SP 20830 - DIS