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

Lucie Hodaňová | Zendy; Lukáš Kalous | Zendy; Zuzana Musilová | Zendy

Open Access

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

Author(s) -

Lucie Hodaňová,

Lukáš Kalous,

Zuzana Musilová

Publication year - 2014

Publication title -

comparative cytogenetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.49

H-Index - 20

eISSN - 1993-078X

pISSN - 1993-0771

DOI - 10.3897/compcytogen.v8i3.7279

Subject(s) - biology , monophyly , karyotype , clade , ploidy , cichlid , phylogenetic tree , cytogenetics , zoology , chromosome , evolutionary biology , genetics , gene , fish <actinopterygii> , fishery

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 CMA3 signal were observed. The results showed evolutionary reduction in this monophyletic clade and the cytogenetic mechanisms (fissions/fusions) were hypothesized and discussed.

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