THE LARGEST KNOWN CHROMOSOME-NUMBER FOR A MAMMAL, IN A SOUTH-AMERICAN DESERT RODENT

被引：47

作者：

CONTRERAS, LC

TORRESMURA, JC

SPOTORNO, AE

机构：

[1] MUSEO NACL HIST NAT, SECC ZOOL, SANTIAGO, CHILE

[2] UNIV CHILE, FAC MED, DEPT BIOL CELULAR & GENET, SANTIAGO 7, CHILE

来源：

EXPERIENTIA | 1990年 / 46卷 / 05期

关键词：

chromosome; heterochromatin; hystricognath; karyology; octodontid; Rodent;

D O I：

10.1007/BF01954248

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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. © 1990 Birkhäuser Verlag.

引用

页码：506 / 508

页数：3

共 25 条

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GEORGE, W
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[9] Hsu TC, 1969, COMP MAMMALIAN CYTOG
[10] QUANTITATIVE-ANALYSIS OF DIRECTIONALITY IN MAMMALIAN KARYOTYPE EVOLUTION
IMAI, HT
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[J]. AMERICAN NATURALIST, 1980, 116 (04) : 537 - 569

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