Publications des scientifiques de l'IRD

Mitchell M. W., Locatelli Sabrina, Abwe E. E., Ghobrial L., Gonder M. K. (2018). Male-driven differences in chimpanzee (Pan troglodytes) population genetic structure across three habitats in Cameroon and Nigeria. International Journal of Primatology, 39 (4), p. 581-601. ISSN 0164-0291.

Titre du document
Male-driven differences in chimpanzee (Pan troglodytes) population genetic structure across three habitats in Cameroon and Nigeria
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000446382800006
Auteurs
Mitchell M. W., Locatelli Sabrina, Abwe E. E., Ghobrial L., Gonder M. K.
Source
International Journal of Primatology, 2018, 39 (4), p. 581-601 ISSN 0164-0291
Complex ecological pressures affect the social dynamics of many primate species, but it is unclear how they affect primate speciation. Molecular tools are often used to answer questions about the evolutionary histories and social systems of primates. Mitochondrial DNA (mtDNA), in particular, is frequently used to answer many of these questions, but because it is passed from mothers to offspring it reveals only the histories of females. In many species, including chimpanzees, females generally disperse from their natal groups while males are philopatric, and thus differences in dispersal patterns likely leave different signatures in the genome. We previously analyzed samples from 187 unrelated male and female chimpanzees in Nigeria and Cameroon using 21 autosomal microsatellites and mtDNA sequences. Here, we examine the contributions of males and females in shaping the genetic history of these chimpanzees by genotyping a subset of 56 males at 12 Y-chromosome microsatellites. We found that Y-chromosome population structure differed from the results of analysis of mtDNA haplotypes. The results also revealed that males in rainforest habitats (Guinean and Congolian rainforests) are more closely related to one another than those inhabiting the savanna-woodland mosaic ecotone in central Cameroon. In contrast, the pattern of female relatedness did not differ across habitats. We hypothesize that these differences in population structure and patterns of relatedness among males in different habitat types may be due to differences in the community dynamics of chimpanzees in the ecotone vs. rainforests, and that these factors contribute to making Cameroon an engine of diversification for chimpanzees. Broadly, these results demonstrate the importance of habitat variation in shaping social systems, population genetics, and primate speciation.
Plan de classement
Sciences du monde animal [080] ; Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
CAMEROUN ; NIGERIA
Localisation
Fonds IRD [F B010074106]
Identifiant IRD
fdi:010074106
Contact