Origin of the X1X1X2X2/X1X2Y sex chromosome system of Harttia punctata (Siluriformes, Loricariidae) inferred from chromosome painting and FISH with ribosomal DNA markers

被引:0
|
作者
Daniel Rodrigues Blanco
Marcelo Ricardo Vicari
Roberto Laridondo Lui
Roberto Ferreira Artoni
Mara Cristina de Almeida
Josiane Baccarin Traldi
Vladimir Pavan Margarido
Orlando Moreira-Filho
机构
[1] Universidade Tecnológica Federal do Paraná,Departamento de Biologia Estrutural, Molecular e Genética
[2] Universidade Estadual de Ponta Grossa,Centro de Ciências Biológicas e da Saúde
[3] Universidade Estadual do Oeste do Paraná,Departamento de Genética e Evolução
[4] Universidade Federal de São Carlos,undefined
来源
Genetica | 2014年 / 142卷
关键词
Karyotypic diversification; Chromosomal translocation; Sex chromosomes;
D O I
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中图分类号
学科分类号
摘要
Harttia is a genus in the subfamily Loricariinae that accommodates fishes popularly known as armored catfishes. They show extensive karyotypic diversity regarding interspecific numerical/structural variation of the karyotypes, with the presence of the XX/XY1Y2 multiple sex chromosome system, as found in H. carvalhoi. In this context, this study aimed to characterize Harttia punctata chromosomally, for the first time, and to infer the rearrangements that originated the X1X1X2X2/X1X2Y multiple sex chromosome system present in this species. The data obtained in this study, with classical (Giemsa, C-banding and AgNORs) and molecular methodologies (fluorescence in situ hybridization) and chromosome microdissection, indicated that a translocation between distinct acrocentric chromosomes bearing rRNA genes, accompanied by deletions in both chromosomes, might have originated the neo-Y chromosome in this species. The data also suggest that the multiple sex chromosome systems present in H. carvalhoi and H. punctata had an independent origin, evidencing the recurrence of chromosome alterations in species from this genus.
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页码:119 / 126
页数:7
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