Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin-Reference-Cited by-同舟云学术

Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin

Published:2018-03-26 Issue:1 Volume:16 Page:
ISSN:1982-0224
Container-title:Neotropical Ichthyology
language:
Short-container-title:Neotrop. ichthyol.

Author:

Teixeira Thais K. S. S.¹^ORCID,Venere Paulo C.¹,Ferreira Daniela C.¹,Mariotto Sandra²,Castro Jonathan P.³,Artoni Roberto F.⁴,Centofante Liano¹

Affiliation:

1. Universidade Federal de Mato Grosso, Brazil

2. Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso, Brazil

3. Universidade Federal de São Carlos, Brazil

4. Universidade Federal de São Carlos, Brazil; Universidade Estadual de Ponta Grossa, Brazil

Abstract

ABSTRACT Astyanax is one of the most abundant and diverse taxa of fishes in the Neotropical region. In order to increase the amount of cytogenetic information for Astyanax as well as to exhibit data to subsidize future taxonomic studies, this work analyzed three species of Astyanax: two species are cryptic, and are here reported to live in syntopy (A. abramis and A. lacustris); the first karyotype description for A. pirapuan is also presented. Cytogenetic analyzes reveal a diploid number of 2n=50 chromosomes for three species, yet with differences in their karyotype morphology. The physical mapping of 18S rDNA showed up to thirteen sites in A. pirapuan and two in A. abramis and A. lacustris. The physical mapping of 5S rDNA has proven to be an effective marker for the characterization of species of Astyanax studied in this work.

Publisher

FapUNIFESP (SciELO)

Subject

Aquatic Science,Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

Link

http://www.scielo.br/pdf/ni/v16n1/1982-0224-ni-16-01-e170092.pdf

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