Male-mediated introgression of Bos indicus genes into Argentine and Bolivian Creole cattle breeds.
Anim Genet
; 31(5): 302-5, 2000 Oct.
Article
em En
| MEDLINE
| ID: mdl-11105209
ABSTRACT
The geographic distribution and frequency of Bos taurus and Bos indicus Y chromosome haplotypes amongst Argentine and Bolivian Creole cattle breeds were studied, using cytogenetic and molecular genetic techniques. A complete correspondence between Y chromosome morphology and the haplotype of the Y-linked microsatellite marker INRA 124 was found in all males examined. The taurine and indicine haplotypes were detected in 85.7 and 14.3% of the males studied, respectively, although these frequencies varied amongst the different breeds examined. The geographic distribution of this polymorphism suggests a pattern of zebu introgression in South America. The highest frequencies of the Zebu Y-chromosome are found in Brazilian populations (43-90%), in the eastern part of the continent, while it is absent in the southernmost breeds from Uruguay and Argentina. Bolivian breeds, at the centre of the continent, exhibit intermediate values (17-41%). This east/west and north/south gradient of male Zebu introgression could be explained by historical events and environmental factors.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromossomo Y
/
Bovinos
/
Repetições de Microssatélites
Limite:
Animals
País/Região como assunto:
America do sul
/
Argentina
/
Bolivia
Idioma:
En
Revista:
Anim Genet
Assunto da revista:
GENETICA
/
MEDICINA VETERINARIA
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Argentina