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MOLECULAR PHYLOGENETIC STUDY OF DROSOPHILA

果蝇分子系统发育研究

基本信息

批准号：
06640906
负责人：
AOTSUKA Tadashi
金额：
$ 1.41万
依托单位：
TOKYO METROPOLITAN UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06640906/
关键词：
Drosophila Molecular Phylogeny Adh mtDNA Hawaiian Drosophila アルコール脱水素酵素 Adh遺伝子

项目摘要

On the basis of internal marphology and biogeography, Throckmorton (1966,1975) proposed a hypothesis for phylogenetic relationships between the species group of the family Droso-philidae, which has been widely accepted by many evolutionary biologists. On the other hand, using a caldistic analysis of many external morphological traits, Grimaldi (1990) recently put forward another hypothesis that was very different from Throckmorton's. We therefore re- examined phlogenetic relationships between the species of the family Drosophilidae by nucleotide sequences of the alcohol dehydrogenase (ADH) and the mitochondrial ND2 genes. The molecular phylogenetic trees obtained from these sequences were significantly different from Grimaldi's hypothesis. On the whole, our results supported the Throckmorton's hypothesis. However, our trees offered some new knowledege for understanding Drosophila phylogeny which have not been pointed out neither in Throckmorton's or Grimaldi's hypotheses. Among those, a information for the origin of Hawaiian drosophilids is very interesting. The hypothesis that Hawaiian drosophilids originated in the immigrans- Hirtodrosohila radiation (Throckmorton, 1975) has been widely accepted by many drosophilists. In this study, however, this group is found to be more closely related to the species of the virilis- repleta lineage that diverged from the immigrans- Hirtodrosohila lineage.

Throckmorton（1966，1975）在内部形态学和地理学的基础上，提出了果蝇科种组间系统发育关系的假说，该假说已被许多进化生物学家所接受。另一方面，Grimaldi（1990）利用对许多外部形态特征的热量分析，最近提出了另一个与Throckmorton的假说截然不同的假说。因此，我们重新研究了果蝇科物种之间的乙醇脱氢酶（ADH）和线粒体ND 2基因的核苷酸序列的亲缘关系。从这些序列中获得的分子系统发育树与Grimaldi的假设有显着不同。总体上，我们的结果支持Throckmorton的假设。然而，我们的树提供了一些新的知识，了解果蝇的生殖，没有指出在Throckmorton的或Grimaldi的假说。其中，夏威夷果蝇起源的信息非常有趣。夏威夷果蝇起源于移民- Hirtodrosohila辐射的假说（Throckmorton，1975）已被许多果蝇学家广泛接受。然而，在这项研究中，发现这一群体与从移民- Hirtodrosohila谱系中分化出来的virilis- repleta谱系的物种更密切相关。