Comparative cytogenetics of Neotropical cichlid fishes (Nannacara, Ivanacara and Cleithracara) indicates evolutionary reduction of diploid chromosome numbers

0506399 - ÚŽFG 2020 RU eng J - Journal Article
Hodaňová, L. - Kalous, L. - Musilová, Zuzana
Comparative cytogenetics of Neotropical cichlid fishes (Nannacara, Ivanacara and Cleithracara) indicates evolutionary reduction of diploid chromosome numbers.
Comparative Cytogenetics. Roč. 8, č. 3 (2014), s. 169-183. ISSN 1993-0771. E-ISSN 1993-078X
Institutional support: RVO:67985904
Keywords : cichlid cytotaxonomy * cyt b * 16S rRNA
OECD category: Zoology
Impact factor: 1.210, year: 2014

A comparative cytogenetic analysis was carried out in five species of a monophyletic clade of neotropical Cichlasomatine cichlids, namely Cleithracara maronii Steindachner, 1881, Ivanacara adoketa (Kullander & Prada-Pedreros, 1993), Nannacara anomala Regan, 1905, N. aureocephalus Allgayer, 1983 and N. taenia Regan, 1912. Karyotypes and other chromosomal characteristics were revealed by CDD banding and mapped onto the phylogenetic hypothesis based on molecular analyses of four genes, namely cyt b, 16S rRNA, S7 and RAG1. The diploid numbers of chromosomes ranged from 44 to 50, karyotypes were composed predominantly of monoarmed chromosomes and one to three pairs of CMA(3) signal were observed. The results showed evolutionary reduction in this monophyletic clade and the cytogenetic mechanisms (fissions/fusions) were hypothesized and discussed.
Permanent Link: http://hdl.handle.net/11104/0297642