Genetic diversity between herds of Alpine and Saanen dairy goats and the naturalized Brazilian Moxotó breed

Genetics and Molecular Biology

Adriana Mello De Araújo²  Simone Eliza Facioni Guimarães²  Thea Mírian Medeiros Machado²  Paulo Sávio Lopes²  Carmen Silva Pereira²  Francisco Luiz Ribeiro Da Silva¹  Marcelo Teixeira Rodrigues²  Virgínia De Souza Columbiano²  Cleusa Graça Da Fonseca¹ 

[1] ,Universidade Federal de Viçosa Departamento de Ciência Animal Laboratório de Biotecnologia AnimalViçosa MG ,Brazil

关键词: conservation;    DNA microsatellite;    genetic distance;    genetic diversity;    goats;   

DOI  :  10.1590/S1415-47572006000100014

来源: SciELO

【 摘 要 】

Brazilian naturalized goat breeds are adapted to the semiarid conditions prevalent in the Northeast region of the country (which has the largest Brazilian goat heard) and represent an as yet uninvestigated source of genetic diversity. Currently, imported goat breeds are crossed with Brazilian naturalized goat breeds, endangering the genetic potential of the naturalized breeds. We used 11 microsatellite markers to determine the genetic diversity among imported (non-naturalized) dairy Alpine and Saanen goats and naturalized Brazilian Moxotó goats. We genotyped 292 goats from three herds (one private, one from the University of Minas Gerais and the Moxotó conservation herd from Embrapa Caprinos) and found that the general heterozygosity was 0.6952 for Alpine, 0.7043 for Saanen and 0.4984 for Moxotó goats. The number of alleles ranged from 5 (INRA005) to 11 (BM3205), with an average of 7 alleles per locus in the imported breeds and 3.5 alleles per locus in the Moxotó breed. Mean differentiation between populations was higher for herds (F ST S = 0.0768) than for breeds (F ST P = 0.0263), indicating similarity between the imported breeds and the existence of crosses between them. Nei's genetic distance was highest between the Moxotó breed and the imported breeds. These indicate that further studies using these molecular markers would be fruitful.

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