2003 Fiscal Year Final Research Report Summary
CONPREHENSIVE RESEARCH ON SUBSPECIATION IN AGILE GIBBONS
| Project/Area Number |
14405020
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
人類学(含生理人類学)
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HIRAI Hirohisa KYOTO UNIVERSITY, PRIMATE RESEARCH INSTITUTE, ASSOCIATE PROFESSOR, 霊長類研究所, 助教授 (10128308)
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| Co-Investigator(Kenkyū-buntansha) |
GOTO Shunji KYOTO UNIVERSITY, PRIMATE RESEARCH INSTITUTE, ASSISTANT PROFESSOR, 霊長類研究所, 助手 (90093343)
TANAKA Hiroyuki KYOTO UNIVERSITY, PRIMATE RESEARCH INSTITUTE, ASSISTANT PROFESSOR, 霊長類研究所, 助手 (20335243)
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| Project Period (FY) |
2002 – 2003
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| Keywords | agile gibbons / subspeciation / Sunnda Islands / whole-arm translocation of chromosome / mitochondorial DNA / TSPY gene / microsatellite DNA / bioaeoaraphy |
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| Research Abstract |
Gibbons, like orangutans, are a group of threatened Asian apes, so that genetic monitoring of each species or subspecies is a pressing need for conservation programs. We conducted a project to take, as far as possible, samples of known origin from wild-born animals from Sumatra and Borneo (Central Kalimantan) for genetic monitoring of agile gibbons. As a result, we found a whole arm translocation between chromosomes 8 and 9 (WAT8/9) specific to Sumatran agile gibbons.
Furthermore, population surveys suggested that the form with the WAT8/9 seems to be incompatible with an ancestral form, suggesting that the former might have extinguished the latter from Sumatran populations by competition. In any case, this translocation is a useful chromosomal marker for identifying Sumatran agile gibbons. Population genetic analyses with DNA showed that the molecular genetic distance between Sumatran and Bornean agile gibbons is the smallest, although the chromosomal difference is the largest. Thus, it is postulated that WAT8/9 occurred and fixed in a small population of Sumatra after migration and geographical isolation at the last glacial period, and afterwards dispersed rapidly to other populations in Sumatra as a result of the bottleneck effect and a chromosomal isolating mechanism. The data obtained here could be very useful as genetic markers for identifying species or subspecies that would be indispensable to conservation programs. The WAT8/9 rearrangement is a remarkable chromosomal marker for separating Sumatran and Bornean agile gibbons.
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