Reeve H K, Westneat D F, Noon W A, Sherman P W, Aquadro C F
Section of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853.
Proc Natl Acad Sci U S A. 1990 Apr;87(7):2496-500. doi: 10.1073/pnas.87.7.2496.
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.
利用DNA指纹技术，我们研究了一种群居性哺乳动物裸鼹鼠（Heterocephalus glaber；啮齿目：滨鼠科）的四个野生捕获群体（n = 50只个体）内部和之间的遗传结构。我们发现群体成员的DNA指纹惊人地相似，而且群体之间的相似程度比其他自由生活脊椎动物中非亲属的指纹要高得多。群体内部的极端遗传相似性是由于亲缘关系密切（平均亲缘关系估计值±标准误，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）是迄今在野生哺乳动物中记录到的最高值。裸鼹鼠群体的遗传结构为合作繁殖和群居性进化的亲缘选择和生态限制模型提供了支持。
