Very low genetic variability in the Indian queenless ant Diacamma indicum
Very low genetic variability in the Indian queenless ant Diacamma indicum
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DOI：
10.1111/j.1365-294x.2004.02201.x
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发表时间：
2004-07-01
影响因子：
4.9
通讯作者：
Doums, C
中科院分区：
文献类型：
--
作者：
Viginier, B;Peeters, C;Doums, C
我们开发了微卫星标记，并将其与线粒体标记相结合，分析了印度圆蚁的群体遗传结构。这个物种，缺乏有翼的女王，很可能有一个有限的女性传播，但表现出各种生活史特征，表明更高的传播能力比其他Diacamma物种。在来自印度南部7个居群的166个个体中，11个微卫星中只有4个具有多态性，只有1个具有4个以上等位基因。在整个印度（包括北部的一个人口）和斯里兰卡只检测到一个线粒体DNA（mtDNA）单倍型。与印度南部分布范围小得多的其他Diacamma物种相比，这种多态性水平特别低。在相隔几公里以上的种群之间观察到强烈的遗传分化。我们还分析了印度群体和来自日本冲绳的两个群体之间的遗传分化，这两个群体在形态上相似，可能属于同一个物种。这两个标记的遗传分化都很高，表明这些人群之间没有持续的基因流。
We developed microsatellite markers and combined them with mitochondrial markers to analyse the population genetic structure of the queenless ant Diacamma indicum. This species, lacking winged queens, is likely to have a restricted female dispersal but exhibits various life history traits suggesting higher dispersal abilities than the other Diacamma species. Only 4 of 11 microsatellites were polymorphic and only 1 had more than 4 alleles over 166 individuals originating from 7 populations from the south of India. Only one mitochondrial DNA (mtDNA) haplotype was detected throughout India (including one population in the north) and Sri Lanka. Such a level of polymorphism is particularly low compared with other Diacamma species having much smaller ranges in the south of India. A strong genetic differentiation was observed between populations separated by more than a few kilometres. We also analysed the genetic differentiation between the Indian populations and two populations from the Japanese island of Okinawa, which are morphologically similar and might belong to the same species. The genetic differentiation was high for both markers, suggesting an absence of ongoing gene flow between these populations.