From chromosomes to genome

Insights into the evolutionary relationships and biogeography of old world Knifefishes (Notopteridae; Osteoglossiformes)

Felipe Faix Barby, Petr Ráb, Sébastien Lavoué, Tariq Ezaz, Luiz Antônio Carlos Bertollo, Andrzej Kilian, Sandra Regina Maruyama, Ezequiel Aguiar De Oliveira, Roberto Ferreira Artoni, Mateus Henrique Santos, Oladele Ilesanmi Jegede, Terumi Hatanaka, Alongklod Tanomtong, Thomas Liehr, Marcelo de Bello Cioffi

Research output: Contribution to journalArticle

6 Citations (Scopus)
18 Downloads (Pure)

Abstract

In addition to its wide geographical distribution, osteoglossiform fishes represent one of the most ancient freshwater teleost lineages; making it an important group for systematic and evolutionary studies. These fishes had a Gondwanan origin and their past distribution may have contributed to the diversity present in this group. However, cytogenetic and genomic data are still scarce, making it difficult to track evolutionary trajectories within this order. In addition, their wide distribution, with groups endemic to different continents, hinders an integrative study that allows a globalized view of its evolutionary process. Here, we performed a detailed chromosomal analysis in Notopteridae fishes, using conventional and advanced molecular cytogenetic methods. Moreover, the genetic distances of examined species were assessed by genotyping using diversity arrays technology sequencing (DArTseq). These data provided a clear picture of the genetic diversity between African and Asian Notopteridae species, and were highly consistent with the chromosomal, geographical, and historical data, enlightening their evolutionary diversification. Here, we discuss the impact of continental drift and split of Pangea on their recent diversity, as well as the contribution to biogeographical models that explain their distribution, highlighting the role of the Indian subcontinent in the evolutionary process within the family.

Original languageEnglish
Article number306
Pages (from-to)1-21
Number of pages21
JournalGenes
Volume9
Issue number6
DOIs
Publication statusPublished - 19 Jun 2018

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