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Molecular characterization of two common Chadian cattle breeds

Flury, C. ; Ngandolo, B.N.R. ; Müller, B. ; Zinsstag, J. ; Kadarmideen, H.N.

In: Animal Genetic Resources Information, 2009, vol. 44, p. 67-76

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    Titel
    • Molecular characterization of two common Chadian cattle breeds
    Autor
    • Flury, C.. Institue of Animal Science, Swiss Federal Institute of Technology (ETH), Universitätsstrasse 65, 8092 Zürich, Switzerland
    • Ngandolo, B.N.R.. Laboratoire de Recherches Vétérinaires et Zootechniques de Farcha, P.O. Box 433, N'Djaména, Chad
    • Müller, B.. Swiss Tropical Institute, P.O. Box, 4002 Basel, Switzerland
    • Zinsstag, J.. Swiss Tropical Institute, P.O. Box, 4002 Basel, Switzerland
    • Kadarmideen, H.N.. CSIRO Livestock Industries, JM Rendel Laboratory, P.O. Box 5545, Rockhampton, QLD 4702, Australia
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Animal Genetic Resources Information, 2009, vol. 44, p. 67-76. Cambridge University Press
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:300046
    Summary
    In previous studies, significant differences in Mycobacterium bovis infection prevalence was reported between two Chadian cattle breeds. Those findings and the established differentiation due to phenotypic characteristics suggest that the two breeds (Arab and Mbororo) are genetically different. To evaluate the genetic structure and the differences between these breeds, the genetic diversity within and between breeds was evaluated based on a total of 205 multilocus genotypes (21 microsatellite loci). All of the loci under investigation were polymorphic and the number of alleles ranged from 4 to14 within the two populations. The analysis of population fixation resulted in a FST value of 0.006. Further the population assignment of the individual genotypes and the exact test of population differentiation did not support the hypothesis that the samples drawn from the two populations are genetically different. Population admixture and sample collection are discussed as possible reasons for the rejection of the hypothesis. Finally, recommendations for sample collection in extensive systems are given