Featured Research

from universities, journals, and other organizations

Nearby chimpanzee populations show much greater genetic diversity than distant human populations

Date:
March 2, 2012
Source:
Wellcome Trust
Summary:
Chimpanzee populations living in relatively close proximity are substantially more different genetically than humans living on different continents, according to a new study. The study suggests that genomics can provide a valuable new tool for use in chimpanzee conservation, with the potential to identify the population of origin of an individual chimpanzee or the provenance of a sample of bush meat.

Chimpanzee populations living in relatively close proximity are substantially more different genetically than humans living on different continents.
Credit: Eric Gevaert / Fotolia

Chimpanzee populations living in relatively close proximity are substantially more different genetically than humans living on different continents, according to a study recently published in PLoS Genetics. The study suggests that genomics can provide a valuable new tool for use in chimpanzee conservation, with the potential to identify the population of origin of an individual chimpanzee or the provenance of a sample of bushmeat.

Common chimpanzees in equatorial Africa have long been recognized as falling into three distinct populations, or subspecies: western, central and eastern chimpanzees. A fourth group, the Cameroonian chimpanzee, has been proposed to live in southern Nigeria and western Cameroon, but there has been considerable controversy regarding whether it constitutes a distinct group.

Scientists from the Universities of Oxford and Cambridge, the Broad Institute, the Centre Pasteur du Cameroun and the Biomedical Primate Research Centre examined DNA from 54 chimpanzees, measuring the DNA at 818 positions across the genome that varied between individuals. Analysis of patterns in the data showed Cameroonian chimpanzees to be distinct from the other, well-established groups.

Intriguingly, a previous conclusion based on earlier studies -- that Cameroonian and western chimpanzees were most closely related -- was shown to be untrue; instead, the closest relationships to Cameroonian chimpanzees are with nearby central chimpanzees.

Dr Rory Bowden from the University of Oxford, who led the study, said: "These findings have important consequences for conservation. All great ape populations face unparalleled challenges from habitat loss, hunting and emerging infections, and conservation strategies need to be based on sound understanding of the underlying population structure. The fact that all four recognized populations of chimpanzees are genetically distinct emphasizes the value of conserving them independently.

"Genomics can also provide tools for use in chimpanzee conservation. Genetic tests could cheaply and easily identify the population of origin of an individual chimpanzee or even a sample of bushmeat."

The authors also contrasted the levels of genetic differentiation between the chimpanzees from the different groups with those based on similar data from humans from different populations. Surprisingly, even though all the chimpanzee populations lived in relatively close proximity (with the habitats of two groups separated only by a river), chimpanzees from different populations were substantially more different genetically than humans living on different continents.

Professor Peter Donnelly, Director of the Wellcome Trust Centre for Human Genetics in Oxford and a senior author on the study, said: "Relatively small numbers of humans left Africa 50 000-100 000 years ago. All non-African populations descended from them and are reasonably similar genetically.

"That chimpanzees from habitats in the same country, separated only by a river, are more distinct than humans from different continents is really interesting. It speaks to the great genetic similarities between human populations, and to much more stability, and less interbreeding, over hundreds of thousands of years, in the chimpanzee groups."

The conservation implications of the study extend to other species. New techniques such as next-generation sequencing, which have become available since the study was initiated, will allow a catalogue of genetic variation to be obtained cheaply and easily for any species, simply by sequencing even one or two individuals. Such a catalogue could then be used to perform a study like this one, to identify genetically distinct groups, and subsequently to develop simple and cheap tests of population of origin.

Dr Nick Mundy, from the University of Cambridge, and the paper's other senior author, said: "Because they are humans' nearest relatives, the structure and origins of chimpanzee populations have long been of wide interest. Future studies will be able to use genome data to uncover the adaptations that are unique to the Cameroonian chimpanzees."


Story Source:

The above story is based on materials provided by Wellcome Trust. Note: Materials may be edited for content and length.


Journal Reference:

  1. Bowden R, MacFie TS, Myers S, Hellenthal G, Nerrienet E, et al. Genomic Tools for Evolution and Conservation in the Chimpanzee: Pan troglodytes ellioti Is a Genetically Distinct Population. PLoS Genet, 2012 DOI: 10.1371/journal.pgen.1002504

Cite This Page:

Wellcome Trust. "Nearby chimpanzee populations show much greater genetic diversity than distant human populations." ScienceDaily. ScienceDaily, 2 March 2012. <www.sciencedaily.com/releases/2012/03/120302101706.htm>.
Wellcome Trust. (2012, March 2). Nearby chimpanzee populations show much greater genetic diversity than distant human populations. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/03/120302101706.htm
Wellcome Trust. "Nearby chimpanzee populations show much greater genetic diversity than distant human populations." ScienceDaily. www.sciencedaily.com/releases/2012/03/120302101706.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins