Divergent karyotypes of the annual killifish genus Nothobranchius (Cyprinodontiformes, Nothobranchiidae)

Eugene Krysanov; Tatiana Demidova; Bela Nagy

doi:10.3897/CompCytogen.v10i3.9863

Divergent karyotypes of the annual killifish genus Nothobranchius (Cyprinodontiformes, Nothobranchiidae)

Comp Cytogenet. 2016 Sep 16;10(3):439-445. doi: 10.3897/CompCytogen.v10i3.9863. eCollection 2016.

Authors

Eugene Krysanov¹, Tatiana Demidova¹, Bela Nagy²

Affiliations

¹ Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky prospect, Moscow, 119071 Russia.
² 30, rue du Mont Ussy, 77300 Fontainebleau, France.

Abstract

Karyotypes of two species of the African annual killifish genus Nothobranchius Peters, 1868, Nothobranchius brieni Poll, 1938 and Nothobranchius sp. from Kasenga (D.R. Congo) are described. Both species displayed diploid chromosome number 2n = 49/50 for males and females respectively with multiple-sex chromosome system type X₁X₂Y/X₁X₁X₂X₂. The karyotypes of studied species are considerably different from those previously reported for the genus Nothobranchius and similar to the Actinopterygii conservative karyotype.

Keywords: Africa; Nothobranchius; chromosome number; karyotype; killifish.