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CONPREHENSIVE RESEARCH ON SUBSPECIATION IN AGILE GIBBONS

敏捷长臂猿亚种的综合研究

基本信息

批准号：
14405020
负责人：
HIRAI Hirohisa
金额：
$ 4.67万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

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.

长臂猿和猩猩一样，都是受威胁的亚洲猿类，因此对每个物种或亚种进行基因监测是保护计划的迫切需要。我们开展了一个项目，尽可能从苏门答腊岛和婆罗洲（加里曼丹中部）的野生动物身上采集已知来源的样本，用于敏捷长臂猿的基因监测。结果，我们发现了苏门答腊敏捷长臂猿特有的8号和9号染色体之间的全臂易位（WAT8/9）。此外，种群调查表明，WAT8/9的形态似乎与祖先形态不相容，这表明前者可能通过竞争将后者从苏门答腊种群中消灭。无论如何，这种易位是识别苏门答腊敏捷长臂猿的有用染色体标记。 DNA群体遗传分析表明，苏门答腊敏捷长臂猿和婆罗洲敏捷长臂猿虽然染色体差异最大，但分子遗传距离最小。由此推测，WAT8/9在末次冰期经过迁徙和地理隔离后，在苏门答腊岛的一小部分种群中发生并固定，之后由于瓶颈效应和染色体隔离机制，迅速分散到苏门答腊岛的其他种群中。这里获得的数据作为遗传标记非常有用，可用于识别保护计划中不可或缺的物种或亚种。 WAT8/9 重排是区分苏门答腊敏捷长臂猿和婆罗洲敏捷长臂猿的显着染色体标记。