A ZZ/ZW sex chromosome system in a new species of the genus Parodon (Pisces, Parodontidae)

被引：51

作者：

Centofante, L ^{[1
]}

Bertollo, LAC ^{[1
]}

Moreira, O ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Genet & Evolucao, BR-13565905 Sao Carlos, SP, Brazil

来源：

CARYOLOGIA | 2002年 / 55卷 / 02期

关键词：

biological diversity; Parodon fish; sex chromosomes;

D O I：

10.1080/00087114.2002.10589270

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A chromosome analysis was carried out in two sympatric fish species of the genus Parodon, Parodon sp. and P tortuosus, from the Paran basin, Sao Paulo State, Brazil. Although both species showed the same diploid number (2n=54), an interspecific diversity was detected concerning their karyotypic formulas and banding patterns, besides a ZZ/ZW sex chromosome system detected in Parodon sp., which was caracterized as a new species for this genus. No heteromorphic sex chromosomes were found in R tortuosus. These data are discussed concerning the characterization of the regional ictiofauna and its evolutionary aspects.

引用

页码：139 / 150

页数：12

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