银额果蝇自然群体中的mtDNA多态性研究──Ⅱ．银额果蝇的起源和分化  

A Study of Mitochondrial DNA Polymorphism in Natural Population of Drosophila albomicans──Ⅱ.The Origin and Differentiation of Drosophila albomicans

作　　者：王文[1] 凌发瑶[1] 施立明[1] 

机构地区：[1]中国科学院昆明动物研究所细胞与分子进化开放实验室

出　　处：《Acta Genetica Sinica》1994年第4期263-274,共12页

基　　金：国家自然科学基金

摘　　要：本文以８种限制性内切酶对８个银额果蝇群体进行了ｍｔＤＮＡ的限制性片段长度多态性（ＲＦＬＰ）分析。发现现生银额果蝇种群可以分成三个相对独立的群体，即东部、中部和西部群体。结合其它有关资料，我们推测，银额果蝇可能起源于马来半岛南部和加里曼丹岛一带。起初分成东西两支向北扩散。东支发展成现在的东部群体；西支则在中南半岛北部又分成两个支系；从而形成了现生银额果蝇群体的东部、中部和西部的地理分布模式。mtDNA polymorphism in natural populations of D. albomicans was studied with 8 restriction endonucleases. The result revealed that the extant populations of D. albomicans can be distinguished into three geographic populations, namely, the eastern, the middle and the western. Referring other references, we inferred that D, albomi cans may be originated around Malaysia and Kanlimantan island. At early stage, the ancestral populaton differentiated into two lineages, eastern and western population, both of which expanded towords north. Then, the western lineage diverged into two sublineages again when it reached the north of the Middle-south Penisula. Thereby, the trident pattern of geographic distribution in D. albomicans was constructed.

关 键 词：银额果蝇 线粒体 DNA 多态性 分化 

分 类 号：Q969.462.2[生物学—昆虫学]