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Chromosomal diversification in ribosomal DNA sites in Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil
Abstract. Populations of seven Ancistrus species were analyzed from streams and rivers of three hydrographic Brazilian basins. All populations showed different diploid numbers (2n), fundamental numbers (FNs), and karyotypes. Some representatives of Loricariidae have 2n = 54 chromosomes, which is ver...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Pensoft Publishers
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3833787/ https://www.ncbi.nlm.nih.gov/pubmed/24260636 http://dx.doi.org/10.3897/CompCytogen.v5i4.1757 |
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author | Mariotto, Sandra Centofante, Liano Vicari, Marcelo Ricardo Artoni, Roberto Ferreira Moreira-Filho, Orlando |
author_facet | Mariotto, Sandra Centofante, Liano Vicari, Marcelo Ricardo Artoni, Roberto Ferreira Moreira-Filho, Orlando |
author_sort | Mariotto, Sandra |
collection | PubMed |
description | Abstract. Populations of seven Ancistrus species were analyzed from streams and rivers of three hydrographic Brazilian basins. All populations showed different diploid numbers (2n), fundamental numbers (FNs), and karyotypes. Some representatives of Loricariidae have 2n = 54 chromosomes, which is very likely an ancestral cytotaxonomic characteristic, but many other representatives show extensive karyotype diversification. In the Ancistrus species studied, extensive karyotypic differentiation, which is generally associated with chromosome number reduction and rearrangement of the ribosomal RNA gene (rDNA) sites, was verified. Chromosomal locations of 18S and 5S rDNA were jointly detected using fluorescence in situ hybridization (FISH). In all the Ancistrus species analyzed, 18S rDNA sites were detected only on one chromosome pair, though this differed among species. 5S rDNA was located on 1–3 chromosome pairs either separately or in synteny with 18S rDNA in four of the seven species/populations. Hence the karyotype differentiation in Ancistrus species could be associated with a morphological speciation process, suggesting that chromosome fusions, inversions, deletions, duplications, and heterochromatination could contribute to the karyotype evolution of these neotropical armored catfishes. |
format | Online Article Text |
id | pubmed-3833787 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Pensoft Publishers |
record_format | MEDLINE/PubMed |
spelling | pubmed-38337872013-11-20 Chromosomal diversification in ribosomal DNA sites in Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil Mariotto, Sandra Centofante, Liano Vicari, Marcelo Ricardo Artoni, Roberto Ferreira Moreira-Filho, Orlando Comp Cytogenet Article Abstract. Populations of seven Ancistrus species were analyzed from streams and rivers of three hydrographic Brazilian basins. All populations showed different diploid numbers (2n), fundamental numbers (FNs), and karyotypes. Some representatives of Loricariidae have 2n = 54 chromosomes, which is very likely an ancestral cytotaxonomic characteristic, but many other representatives show extensive karyotype diversification. In the Ancistrus species studied, extensive karyotypic differentiation, which is generally associated with chromosome number reduction and rearrangement of the ribosomal RNA gene (rDNA) sites, was verified. Chromosomal locations of 18S and 5S rDNA were jointly detected using fluorescence in situ hybridization (FISH). In all the Ancistrus species analyzed, 18S rDNA sites were detected only on one chromosome pair, though this differed among species. 5S rDNA was located on 1–3 chromosome pairs either separately or in synteny with 18S rDNA in four of the seven species/populations. Hence the karyotype differentiation in Ancistrus species could be associated with a morphological speciation process, suggesting that chromosome fusions, inversions, deletions, duplications, and heterochromatination could contribute to the karyotype evolution of these neotropical armored catfishes. Pensoft Publishers 2011-11-09 /pmc/articles/PMC3833787/ /pubmed/24260636 http://dx.doi.org/10.3897/CompCytogen.v5i4.1757 Text en Sandra Mariotto, Liano Centofante, Marcelo Ricardo Vicari, Roberto Ferreira Artoni, Orlando Moreira-Filho http://creativecommons.org/licenses/by/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Article Mariotto, Sandra Centofante, Liano Vicari, Marcelo Ricardo Artoni, Roberto Ferreira Moreira-Filho, Orlando Chromosomal diversification in ribosomal DNA sites in Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title | Chromosomal diversification in ribosomal DNA sites in
Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title_full | Chromosomal diversification in ribosomal DNA sites in
Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title_fullStr | Chromosomal diversification in ribosomal DNA sites in
Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title_full_unstemmed | Chromosomal diversification in ribosomal DNA sites in
Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title_short | Chromosomal diversification in ribosomal DNA sites in
Ancistrus Kner, 1854 (Loricariidae, Ancistrini) from three hydrographic basins of Mato Grosso, Brazil |
title_sort | chromosomal diversification in ribosomal dna sites in
ancistrus kner, 1854 (loricariidae, ancistrini) from three hydrographic basins of mato grosso, brazil |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3833787/ https://www.ncbi.nlm.nih.gov/pubmed/24260636 http://dx.doi.org/10.3897/CompCytogen.v5i4.1757 |
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