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Provedor de dados:  Inra
País:  France
Título:  Revealing fine scale subpopulations structure in the Vietnamese H'mong cattle breed for conservation purposes
Autores:  Berthouly, C.
Maillard, J.C.
Pham Doan, L.
Nhu Van, T;
Bed'Hom, B.
Leroy, G.
Hoang Thanh, H.
Laloë, D.
Bruneau, N.
Vu Chi, C.
Nguyen Dang, V.
Verrier, E.
Rognon, X.
Data:  2010
Ano:  2010
Palavras-chave:  Animals
Gene Flow
Genes sry
Genetic Variation
Genetics Population
Microsatellite Repeats
Single Nucleotide
RNA Messenger
Resumo:  Background: During the last decades, there has been an acceleration of the loss of domestic animal biodiversity. Forconservation purposes, the genetic diversity of the H'Mong cattle, an indigenous local breed was studied. Singlenucleotidepolymorphisms (SNP) of the SRY gene and mtDNA D-Loop sequence were analysed to clarify the origin ofthe breed. The genetic diversity was assessed through genetic data with twenty-five FAO microsatellites, andmorphometric data with five body measurements from 408 animals sampled from eight districts of the Ha Giangprovince.Results: The SRY genes were all of the zebu type. Among the 27 mtDNA haplotypes, 12 haplotypes were of the taurinetype and the remaining 15 of the zebu type. This indicates female taurine introgression in the zebu H'Mong. Theobserved and expected heterozygosity ranged from 0.616 to 0.673 and from 0.681 to 0.729 respectively according todistrict, with low genetic differentiation (FST = 0.0076). Multivariate analysis on morphometric and genetic data shows aseparation of districts into two groups following a south-west/north-east cline and admixture analysis confirmed thetwo clusters, but no differentiation of taurine introgression between clusters was observed. A possible admixture withthe Yellow cattle breed from a neighbouring province was suggested through genetic data and householderinterviews.Conclusions: In this study we demonstrate the interest of fine-scale sampling for the study of genetic structure of localbreeds. Such a study allows avoiding erroneous conservation policies and on the contrary, proposes measures forconserving and limiting crossbreeding between the H'Mong and the Yellow cattle breeds.
Tipo:  Journal Article
Idioma:  Inglês
Formato:  application/pdf
Fonte:  BMC Genetics. 2010, 11 : 45

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