Mitochondrial DNA Origin of Indigenous Malagasy Chicken Implication for a Functional Polymorphism at the Mx Gene
文献类型: 外文期刊
第一作者: Razafindraibe, Hanta
作者: Razafindraibe, Hanta;Mobegi, Victor A.;Ommeh, Sheila C.;Bjornstad, Gro;Hanotte, Olivier;Jianlin, Han;Rakotondravao;Jianlin, Han
作者机构:
关键词: Madagascar;chicken;Indonesia;Africa
期刊名称:ANIMAL BIODIVERSITY AND EMERGING DISEASES: PREDICTION AND PREVENTION ( 影响因子:5.691; )
ISSN: 0077-8923
年卷期: 2008 年 1149 卷
页码:
收录情况: SCI
摘要: 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.
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