使用分子遗传学方法对版纳鱼螈分布、起源及扩散的初步研究  

A PRELIMINARY STUDY OF ICHTHYOPHIS BANNANICUS ON ITS RANGE,ORIGIN AND DISTRIBUTION APPROACH BY THE MOLECULAR GENETICS METHOD

作　　者：李桂芬[1] 蒙绍权[1] 骆侠[2] 王慧[2] 贝永建[1,2] 张保卫[2] 

机构地区：[1]玉林师范学院化学与生物系,广西玉林537000 [2]安徽大学生命科学学院,合肥230039

出　　处：《动物分类学报》2010年第2期338-344,共7页Acta Zootaxonomica Sinica

基　　金：广西自然科学基金项目(桂科自:0832285)

摘　　要：版纳鱼螈Ichthyophis bannanicus是蚓螈目Gymnophiona在我国分布的唯一物种。由于长期以来缺乏对版纳鱼螈的分布范围及演化历史等信息的了解,本研究通过分子遗传学的方法,就其分布、起源及扩散等内容进行了探讨。结果发现,我国境内的版纳鱼螈均属同一物种,尚未出现种的分化。研究中明确证实了版纳鱼螈在泰国和越南的分布,提示了版纳鱼螈在中南半岛广为分布,甚至可能达到马来西亚境内。结果还提示水系对版纳鱼螈的分布具有较大的影响,尤其在湄公河水系中表现的最为明显。现有的信息提示版纳鱼螈有可能起源于中南半岛,并沿着澜沧江-湄公河水系、红河-珠江水系、克拉地峡-马来半岛3个方向扩散。我国境内的版纳鱼螈主要分布在云南南部地区和两广丘陵以南,来自这两大分布区的个体之间的遗传差异明显,应属于不同的进化显著单元。Ichthyophis bannanicus is the unique species of Gymnophiona in China. For a long time, little information was learned with Ichthyophis bannanicus about its taxonomic review, distribution range and evolutionary history. Here we address above tissues by the molecular approach. On the basis of data analysis, there are no new species was comprised in the name of ‘Ichthyophis bannanicus’. However, definite results confirmed that Ichthyophis bannanicus distributed in Viet men and Thailand, which indicated that Ichthyophis bannanicus have widely ranged in Indo-China peninsula area, and potentially, reached Malaysia in Malay Peninsula. There is evidence that water systems had a strong influence on the distribution of Ichthyophis bannanicus, especially the Mekong river basin. Our analysis indicated that Ichthyophis bannanicus originated from Indo-China peninsula area, then they spread around in differnt approaches： Lancang-Mekong river systems, Red river and the Pearl River systems, Kra Isthmus, etc. In China, Ichthyophis bannanicus distributed in Southern Yunnan and some regions south to the hilly region of Guangdong and Guangxi, but distinct genetic differentiations was observed in individuals from above two ranges, and they should be belong to different ESU.

关 键 词：版纳鱼螈 分布区 细胞色素B基因 

分 类 号：Q951[生物学—动物学]