Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)

Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)

Cytogenetic analysis of Trichomycterus areolatus, collected from the Tijeral and Huilma Rivers in southern Chile has shown a diploid chromosome number of 2n = 54, a fundamental number of FN = 106, and a karyotypic formula of 44m + 8sm + 2st. Intra-individual polymorphism of chromosome number (2n = 54, 55 and 56) in specimens from the Huilma River has also been documented, providing further evidence of the occurrence of this phenomenon in Trichomycterus. The karyotype exhibited large chromosome pairs: metacentric pairs 1 (relative length 7.54%), 2 (5.75%) and 3 (5.09%), submetacentric pair 23 (5.25%), and subtelocentic pair 27 (5.28%). Nuclear DNA content analysis showed an average value of 5.04 ± 1.09 pg/nucleus. This DNA content is higher than the mean value described for other species in this genus.

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Main Authors: Colihueque,Nelson, Corrales,Olga, Parraguez,Margarita
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Genética 2006
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200014
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spelling oai:scielo:S1415-475720060002000142006-06-12Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)Colihueque,NelsonCorrales,OlgaParraguez,Margarita karyotype nuclear DNA content Trichomycterus Siluriformes Cytogenetic analysis of Trichomycterus areolatus, collected from the Tijeral and Huilma Rivers in southern Chile has shown a diploid chromosome number of 2n = 54, a fundamental number of FN = 106, and a karyotypic formula of 44m + 8sm + 2st. Intra-individual polymorphism of chromosome number (2n = 54, 55 and 56) in specimens from the Huilma River has also been documented, providing further evidence of the occurrence of this phenomenon in Trichomycterus. The karyotype exhibited large chromosome pairs: metacentric pairs 1 (relative length 7.54%), 2 (5.75%) and 3 (5.09%), submetacentric pair 23 (5.25%), and subtelocentic pair 27 (5.28%). Nuclear DNA content analysis showed an average value of 5.04 ± 1.09 pg/nucleus. This DNA content is higher than the mean value described for other species in this genus.info:eu-repo/semantics/openAccessSociedade Brasileira de GenéticaGenetics and Molecular Biology v.29 n.2 20062006-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200014en10.1590/S1415-47572006000200014
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Colihueque,Nelson
Corrales,Olga
Parraguez,Margarita
spellingShingle Colihueque,Nelson
Corrales,Olga
Parraguez,Margarita
Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
author_facet Colihueque,Nelson
Corrales,Olga
Parraguez,Margarita
author_sort Colihueque,Nelson
title Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
title_short Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
title_full Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
title_fullStr Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
title_full_unstemmed Karyotype and nuclear DNA content of Trichomycterus areolatus (Siluriformes, Trichomycteridae)
title_sort karyotype and nuclear dna content of trichomycterus areolatus (siluriformes, trichomycteridae)
description Cytogenetic analysis of Trichomycterus areolatus, collected from the Tijeral and Huilma Rivers in southern Chile has shown a diploid chromosome number of 2n = 54, a fundamental number of FN = 106, and a karyotypic formula of 44m + 8sm + 2st. Intra-individual polymorphism of chromosome number (2n = 54, 55 and 56) in specimens from the Huilma River has also been documented, providing further evidence of the occurrence of this phenomenon in Trichomycterus. The karyotype exhibited large chromosome pairs: metacentric pairs 1 (relative length 7.54%), 2 (5.75%) and 3 (5.09%), submetacentric pair 23 (5.25%), and subtelocentic pair 27 (5.28%). Nuclear DNA content analysis showed an average value of 5.04 ± 1.09 pg/nucleus. This DNA content is higher than the mean value described for other species in this genus.
publisher Sociedade Brasileira de Genética
publishDate 2006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200014
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AT corralesolga karyotypeandnucleardnacontentoftrichomycterusareolatussiluriformestrichomycteridae
AT parraguezmargarita karyotypeandnucleardnacontentoftrichomycterusareolatussiluriformestrichomycteridae
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