在一种南美沙漠啮齿动物中发现的已知哺乳动物最大染色体数。
The largest known chromosome number for a mammal, in a South American desert rodent.
作者信息
Contreras L C, Torres-Mura J C, Spotorno A E
机构信息
Departamento de Biologia, Universidad de La Serena, Chile.
出版信息
Experientia. 1990 May 15;46(5):506-8. doi: 10.1007/BF01954248.
PMID:2347403
Abstract
Tympanoctomys barrerae, a desert specialist member of the family Octodontidae, until now thought to be conservative, and ancestral to South American hystricognath rodents, presents the highest diploid chromosome number (2n = 102) known in a mammal. Unexpectedly, its karyotype was found to be composed mainly of metacentric to sub-metacentric chromosomes. Mechanisms by which such a karyotype may have been derived are discussed.
摘要
巴雷拉纤鼠是八齿鼠科的一种沙漠特化成员，此前一直被认为较为保守，是南美洲豪猪亚目啮齿动物的祖先，它拥有哺乳动物中已知的最高二倍体染色体数（2n = 102）。出乎意料的是，其核型主要由中着丝粒染色体到亚中着丝粒染色体组成。本文讨论了这种核型可能形成的机制。
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