KARYOTYPE EVOLUTION IN CURIMATIDAE (TELEOSTEI, CHARACIFORMES) FROM THE AMAZON REGION .2. CENTRIC FISSIONS IN THE GENUS POTAMORHINA

被引：22

作者：

FELDBERG, E ^{[1
]}

PORTO, JIR ^{[1
]}

NAKAYAMA, CM ^{[1
]}

BERTOLLO, LAC ^{[1
]}

机构：

[1] UNIV FED SAO CARLOS, DEPT CIENCIAS BIOL, BR-13560 SAO CARLOS, SP, BRAZIL

来源：

GENOME | 1993年 / 36卷 / 02期

关键词：

CENTRIC FISSIONS; KARYOTYPIC EVOLUTION; AMAZON FISH; CURIMATIDAE;

D O I：

10.1139/g93-051

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Using cytogenetic analysis following Giemsa staining, nucleolar organizer region (NOR) three distinct karyotypes in three species of curimatids belonging to the fish genus Potamorhina were identified: 2n = 54/44 M + 10 SM (P. pristigaster), 2n = 56/52 M + 2 SM + 2 ST (P. latior), and 2n = 102/2 M + 2 SM + 98 A (P. altamazonica). A 2n = 54 was considered to be the ancestral diploid number and the different karyotypes were probably the result of centric fissions. Both the NOR pattern and constitutive heterochromatin pattern are species specific.

引用

页码：372 / 376

页数：5

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