First Record on Sex Chromosomes in a Species of the Family Cynodontidae: Cynodon gibbus (Agassiz, 1829)

The fish family Cynodontidae belongs to the superfamily Curimatoidea, together with the Hemiodontidae, Serrasalmidae, Parodontidae, Prochilodontidae, Chilodontidae, Curimatidae, and Anostomidae. The majority of the species of this superfamily that have been analyzed to date have a diploid chromosome...

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Bibliographic Details
Published inCytogenetic and genome research Vol. 160; no. 1; p. 29
Main Authors Pinheiro Figliuolo, Vanessa S, Goll, Leonardo, Ferreira Viana, Patrik, Feldberg, Eliana, Gross, Maria C
Format Journal Article
LanguageEnglish
Published Switzerland 2020
Subjects
Animals
Characiformes - genetics
Chromosome Banding
DNA
Evolution, Molecular
Female
Heterochromatin - chemistry
In Situ Hybridization, Fluorescence
Karyotyping
Male
Nucleic Acid Hybridization
Repetitive Sequences, Nucleic Acid
Sex Chromosomes
Microsatellite
Curimatoidea
Rex
Amazon
Sex chromosome
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Summary:The fish family Cynodontidae belongs to the superfamily Curimatoidea, together with the Hemiodontidae, Serrasalmidae, Parodontidae, Prochilodontidae, Chilodontidae, Curimatidae, and Anostomidae. The majority of the species of this superfamily that have been analyzed to date have a diploid chromosome number of 2n = 54. Differentiated sex chromosomes (with female heterogamety) have been observed only in the Prochilodontidae, Parodontidae, and Anostomidae. The present study provides the first description of differentiated sex chromosomes in the cynodontid species Cynodon gibbus, which has a ZZ/ZW system, and shows that repetitive DNA has played a fundamental role in the differentiation of these sex chromosomes.
ISSN:1424-859X
DOI:10.1159/000505889