Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evolutionary Dynamics of Multigene Families in Triportheus (Characiformes, Triportheidae): A Transposon Mediated Mechanism?

Full text
Author(s):
Yano, Cassia F. [1] ; Merlo, Manuel A. [2] ; Portela-Bens, Silvia [2] ; Cioffi, Marcelo de B. [3] ; Bertollo, Luiz A. C. [3] ; Santos-Junior, Celio D. [3] ; Rebordinos, Laureana [2]
Total Authors: 7
Affiliation:
[1] Univ Fed Mato Grosso, Dept Biol & Zool, Cuiaba - Brazil
[2] Univ Cadiz, Dept Biomed Biotecnol & Salud Publ, Fac Ciencias Mar & Ambientales, Puerto Real - Spain
[3] Univ Fed Sao Carlos, Dept Geneit & Evolucao, Sao Carlos - Brazil
Total Affiliations: 3
Document type: Journal article
Source: FRONTIERS IN MARINE SCIENCE; v. 7, JAN 24 2020.
Web of Science Citations: 0
Abstract

Triportheus (Characiformes, Triportheidae) is a freshwater fish genus with 18 valid species. These fishes are widely distributed in the major river drainages of South America, having commercial importance in the fishing market, mainly in the Amazon basin. This genus has diverged recently in a complex process of speciation carried out in different river basins. The use of repetitive sequences is suitable to trace the genomic reorganizations occured along the speciation process. In this work, the 5S rDNA multigene family has been characterized at molecular and phylogenetic level. The results showed that other multigene family has been found within the non-transcribed spacer (NTS): the U1 snRNA gene. Double-FISH with 5S and U1 probes were also performed, confirming the close linkage between these two multigene families. Moreover, evidences of different transposable elements (TE) were detected within the spacer, thus suggesting a transposon-mediated mechanism of 5S-U1 evolutionary pathway in this genus. Phylogenetic analysis demonstrated a species-specific grouping, except for Triportheus pantanensis, Triportheus aff. rotundatus and Triportheus trifurcatus. The evolutionary model of the 5S rDNA in Triportheus species has been discussed. In addition, the results suggest new clues for the speciation and evolutionary trend in these species, which could be suitable to use in other Characiformes species. (AU)

FAPESP's process: 18/22033-1 - An intercontinental approach for the investigation of chromosome evolution, genetic diversity and biogeography in the order Osteoglossiformes (Teleostei: Osteoglossomorpha). Part III
Grantee:Marcelo de Bello Cioffi
Support Opportunities: Regular Research Grants