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云南桔小实蝇五个地理种群的遗传分化研究
引用本文:施伟,叶辉.云南桔小实蝇五个地理种群的遗传分化研究[J].昆虫学报,2004,47(3):384-388.
作者姓名:施伟  叶辉
作者单位:云南大学生命科学学院生物系,昆明,650091
基金项目:国家自然科学基金项目 (3 0 2 60 0 2 3 ),国家重大基础研究计划“973”项目 (2 0 03CB415 10 0 )资助项目
摘    要:对云南省瑞丽、景洪、化念、元江、河口的桔小实蝇5个地理种群共27个个体的线粒体细胞色素氧化酶Ⅰ(COⅠ) 基因进行了部分序列测定。序列的碱基变化中转换明显多于颠换、无碱基的插入和缺失。5个地理种群中共有27个多态位点和23种单倍型,其中2种为共享单倍型。桔小实蝇5个地理种群的Fst值在0.0364~0.1364之间(P>0.05), Nm值在3.88~13.25之间。对其所有单倍型聚类分析发现,单倍型在系统树中的分布散乱、混杂,没有显示出明显的地理分布族群。分析认为5个地理种群间已存有一定程度的遗传分化,但分化的程度还比较低。造成5个种群这种遗传分化的因素主要与地理隔离有关,而种群间低程度的遗传 分化估计与桔小实蝇在云南的发展历史及生态适应有关。

关 键 词:桔小实蝇  地理种群  线粒体DNA  细胞色素氧化酶Ⅰ基因  遗传分化  
文章编号:0454-6296(2004)03-0384-05
修稿时间:2003年11月6日

Genetic differentiation in five geographic populations of the oriental fruit fly,Bactrocera dorsalis (Hendel) (Diptera:Tephritidae) in Yunnan Province
SHI Wei,YE Hui.Genetic differentiation in five geographic populations of the oriental fruit fly,Bactrocera dorsalis (Hendel) (Diptera:Tephritidae) in Yunnan Province[J].Acta Entomologica Sinica,2004,47(3):384-388.
Authors:SHI Wei  YE Hui
Institution:SHI Wei,YE Hui~*
Abstract:Partial mitochondrial cytochrome oxidaseⅠ (COⅠ) region was sequenced from 27 individuals of 5 geographic populations of Bactrocera dorsalis (Hendel) from Ruili, Jinghong, Yuanjiang, Huanian and Hekou of Yunnan Province, respectively. Transition was higher than transversion, without insertion and deletion. In total, 23 haplotypes were identified within the sequences, with 27 sites howing polymorphism and 2 haplotypes shared. The Fst values among 5 populations were 0.0364-0.1364 (P>0.05) and Nm 3.88-3.25. Phylogenetic trees of haplotypes were constructed by N-J method. Haplotypes did not accord with their geography. All results showed that genetic differences existed among 5 populations, but the degree was lower. The main reason of the genetic differentiation among 5 populations should be related to genetic isolation, development history and ecology adaptation of Bactrocera dorsalis.
Keywords:Bactrocera dorsalis  geographical population  mtDNA  cytochrome oxidase gene  genetic differentiation
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