Dispersal and new colony formation in wild naked mole-rats: evidence against inbreeding as the system of mating
Dispersal and new colony formation in wild naked mole-rats: evidence against inbreeding as the system of mating
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DOI：
10.1093/beheco/11.1.7
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发表时间：
2000-01-01
影响因子：
2.4
通讯作者：
Braude, S
中科院分区：
文献类型：
--
作者：
Braude, S
早期对裸鼹鼠的野外研究表明，小的群体是罕见的，群体只能通过现有群体的裂变形成。许多研究人员预计，这将导致极端的近亲繁殖和群体内的高度亲缘关系，从而解释裸鼹鼠社会性的进化。在这里，我报告了野生裸鼹鼠群体中分散和近亲繁殖的证据，这表明近亲繁殖不是这个物种的交配系统，而且近亲繁殖可能很频繁。野生分散体的形态与实验室中报道的分散体相同。以往对裸鼹鼠的分子遗传学研究中，遗传变异水平较低，可能是由于典型的穴居啮齿类动物的粘性种群结构所致。
Early field work on naked mole-rats, Heterocephalus glaber suggested that small colonies are rare and that colonies can only form by fissioning of existing colonies. Many researchers expected that this would result in extreme inbreeding and high relatedness within colonies and would thus explain the evolution of eusociality in naked mole-rats. Here I report evidence of dispersers and outbreeding in colonies of wild naked mole-rats that suggests that inbreeding is not the system of mating for this species and that outbreeding is probably frequent. Wild dispersers have the same morphology as was reported for dispersers in laboratory colonies. Low levels of genetic variation in previous molecular genetic studies of naked mole-rats probably result from the viscous population structure typical of fossorial rodents.