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Ann N Y Acad Sci. 2008 Dec;1149:77-9. doi: 10.1196/annals.1428.047.

Mitochondrial DNA origin of indigenous malagasy chicken.

Author information

1
Department of Animal Biology, Faculty of Sciences, University of Antananarivo, Antananarivo, Madagascar. razafindraibehanta@yahoo.fr

Abstract

We report the mitochondrial DNA (mtDNA) characterization of 77 indigenous chickens (fighting and meat birds) from Madagascar, using DNA sequences of the first hypervariable segment of the D-loop. Comparison with reference samples from the African continent and Asia revealed two mtDNA haplogroups, suggesting a dual geographic and genetic origin for the indigenous Malagasy chickens. The most common haplogroup was present in 65 individuals of the two types; it is likely of Indonesian origin. The second haplogroup was observed in 12 fighting birds and meat chickens; it could be of African continental origin and/or the result of recent introgression with commercial lines. We further studied a G/A single nucleotide polymorphism at nucleotide position 1892 bp of the coding sequence of the Mx gene that is reported to be one of the candidate susceptible/resistant genes to viral infection in chicken. Our results indicate the "susceptible" allele G is the most common with frequencies of 65% and 70% in Malagasy fighting and meat chickens, respectively. However, the allelic frequency difference between the two types of chickens is not significant (P > 0.05). These results are discussed in light of our current linguistic and archaeological knowledge on the origin of indigenous Malagasy chickens.

PMID:
19120178
DOI:
10.1196/annals.1428.047
[Indexed for MEDLINE]

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