Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers....

Full description

Saved in:
Bibliographic Details
Published in:PeerJ (San Francisco, CA) CA), 2018-07, Vol.6, p.e5316-e5316, Article e5316
Main Authors: Araújo, Naiara Pereira, Dias, Cayo Augusto Rocha, Stumpp, Rodolfo, Svartman, Marta
Format: Article
Language:English
Subjects:
Behavior
Chromosome banding
Fluorescent in situ hybridization (FISH)
Genetic aspects
Genetics
Karyotypes
Mitochondrial cytochrome b gene
Physiological aspects
Principal Coordinate Analysis (PCoA)
Spiny rats
Zoology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two species: (2  = 56,  = 106) and (2  = 56,  = 106 and 2  = 56,  = 108). Our analyses included GTG- and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent hybridization (FISH). Comparative GTG- and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for and describe for the first time the banding patterns of the two species.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.5316