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Genetic Variation in the Chimpanzees of Bossou and Nimba

  • Makoto K. Shimada
Part of the Primatology Monographs book series

Abstract

Mitochondrial DNA (mtDNA) is present in much higher copies, 100–1,000 times more, in a cell than nuclear DNA, and sequencing of mtDNA is not subject to the artifacts such as stutter band or allelic dropout that are common in microsatellite genotyping, which is a popular method used in wildlife conservation studies. Although the scope of mtDNA analysis is limited to matrilineal genetic information, it provides haplotypic information (i.e., DNA sequences without interruptions from recombination). This feature of mtDNA allow us to address interesting questions about Bossou and Nimba chimpanzees, including their breeding history, their genetic relationship, social behavior among matrilineal kin, and genetic diversity. Our mtDNA sequencing of Bossou and Nimba chimpanzees found the following: (1) no clear population structure emerged as in other populations of West African chimpanzee (Pan troglodytes verus), suggesting that gene flow was sufficient in the common ancestral population of West African chimpanzees; (2) there is no matrilineal gene exchange between Bossou and Nimba chimpanzees among the current generations; (3) four of the eight original adult members of the Bossou community are likely matrilineal relatives; (4) so far, the matrilineal genetic diversity of the Bossou community is still relatively stable, but there is a high risk of haplotype extinction because of a skewed haplotype distribution and a predicted relaxation of incest avoidance; and (5) finally, hair samples showed an inferior result to other sample types, such as urine, feces, and wadges (chewed-up fruit remains).

Keywords

Hair Sample Ancestral Population Stutter Band Original Adult Bossou Chimpanzee 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The studies reviewed in this chapter consist of field research organized by the Kyoto University Primate Research Institute (KUPRI) and experimental research conducted in the Division of Population Genetics at the National Institute of Genetics (NIG). Y. Sugiyama provided hypotheses and managed the fieldwork. N. Saitou supervised the experiments and analyses. S. Hayakawa, S. Fujita, and T. Humle conducted field sampling and provided useful discussions of the results. T. Matsuzawa, H. Takemoto, G. Yamakoshi, M. Myowa-Yamakoshi, S. Hirata, and G. Ohashi, provided field observation records and were extremely supportive in the field. Y. Noaki helped with the genetic analysis. J. Koman, G. Goumi, P. Chérif, and P. Goumi provided valuable assistance in the field. This project was financially supported by the Nissan Science Foundation (1999) to M.K.S., the Inamori Foundation (2000) to M.K.S., Grants-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture, Japan: research on priority area (No. 14011248) to N.S., international scientific program (No. 10041168) to Y.S., and COE Research (No. 10CE2005) to KUPRI. M.K.S. received the COE fellowships to KUPRI and NIG during this project.

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Copyright information

© Springer 2011

Authors and Affiliations

  1. 1.Primate Research InstituteKyoto UniversityInuyamaJapan
  2. 2.National Institute of GeneticsMishimaJapan
  3. 3.Institute of Comprehensive Medical ScienceFujita Health UniversityToyoakeJapan

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