Chromosomal Evolution and Evolutionary Relationships of Lebiasina Species (Characiformes, Lebiasinidae).

ABSTRACT: We present the first cytogenetic data for Lebiasinabimaculata and L.melanoguttata with the aim of (1) investigating evolutionary events within Lebiasina and their relationships with other Lebiasinidae genera and (2) checking the evolutionary relationships between Lebiasinidae and Ctenoluciidae. Both species have a diploid number 2n = 36 with similar karyotypes and microsatellite distribution patterns but present contrasting C-positive heterochromatin and CMA3+ banding patterns. The remarkable interstitial series of C-positive heterochromatin occurring in L.melanoguttata is absent in L.bimaculata. Accordingly, L.bimaculata shows the ribosomal DNA sites as the only GC-rich (CMA3+) regions, while L.melanoguttata shows evidence of a clear intercalated CMA3+ banding pattern. In addition, the mu

SUBMITTER: Sassi FMC 

PROVIDER: S-EPMC6628269 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature