DNA "fingerprinting" reveals high levels of inbreeding in colonies of the eusocial naked mole-rat.
DNA "fingerprinting" reveals high levels of inbreeding in colonies of the eusocial naked mole-rat.
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DOI：
10.1073/pnas.87.7.2496
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发表时间：
1990-04
影响因子：
11.1
通讯作者：
H. Reeve;D. Westneat;W. Noon;P. Sherman;C. Aquadro
中科院分区：
文献类型：
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作者：
H. Reeve;D. Westneat;W. Noon;P. Sherman;C. Aquadro
利用DNA指纹技术，我们调查了遗传结构内和四个野生捕获的殖民地（n = 50个人）的真社会性哺乳动物，裸鼹鼠（Heterocephalus glaber;啮齿目：Bathyergidae）。我们发现，群体伴侣的DNA指纹惊人地相似，而且群体之间的DNA指纹比其他自由生活的脊椎动物中非亲属的指纹更相似。群体内的极端遗传相似性是由于密切的遗传关系（平均相关性估计值+/- SE，r = 0.81 +/- 0.10），这显然是近亲交配的结果。近亲繁殖系数（F = 0.45 +/- 0.18）是野生哺乳动物中最高的。裸鼹鼠群体的遗传结构为合作育种和真社会性的进化提供了亲属选择和生态约束模型的支持。
Using the technique of DNA fingerprinting, we investigated the genetic structure within and among four wild-caught colonies (n = 50 individuals) of a eusocial mammal, the naked mole-rat (Heterocephalus glaber; Rodentia: Bathyergidae). We found that DNA fingerprints of colony-mates were strikingly similar and that between colonies they were much more alike than fingerprints of non-kin in other free-living vertebrates. Extreme genetic similarity within colonies is due to close genetic relationship (mean relatedness estimate +/- SE, r = 0.81 +/- 0.10), which apparently results from consanguineous mating. The inbreeding coefficient (F = 0.45 +/- 0.18) is the highest yet recorded among wild mammals. The genetic structure of naked mole-rat colonies lends support to kin selection and ecological constraints models for the evolution of cooperative breeding and eusociality.