Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400213 |
Resumo: | ABSTRACT Farlowella is one of the most diverse genera of the Loricariinae, restricted to South America rivers. The taxonomic and phylogenetic relationships among its species are contentious and, while genetic studies would contribute to the understanding of their relationships, the only available datum refer to the karyotype description of only one species. In the present study two Amazonian species, Farlowella cf. amazonum and F. schreitmuelleri, were analyzed using conventional and molecular cytogenetic procedures. Both species had diploid chromosome number 58, but different fundamental numbers (NF) 116 and 112, respectively, indicative of chromosomal rearrangements. C-banding is almost poor, especially in F. cf. amazonum, and occurs predominantly in the centromeric and in some telomeric regions, although genome of F. schreitmuelleri possessed a much larger heterochromatin amount then those of F. cf. amazonum. The chromosomes bearing the NOR sites were likely the same for both species, corresponding to the 1st metacentric pair in F. cf. amazonum and to the 28th acrocentric in F. schreitmuelleri. The location of the 5S rDNA was species-specific marker. This study expanded the available cytogenetic data for Farlowella species and pointed the remarkable karyotype diversity among species/populations, indicating a possible species complex within genus. |
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Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the speciesAmazon regionChromosomal markersKaryotypic characterizationRibosomal DNATwig catfishABSTRACT Farlowella is one of the most diverse genera of the Loricariinae, restricted to South America rivers. The taxonomic and phylogenetic relationships among its species are contentious and, while genetic studies would contribute to the understanding of their relationships, the only available datum refer to the karyotype description of only one species. In the present study two Amazonian species, Farlowella cf. amazonum and F. schreitmuelleri, were analyzed using conventional and molecular cytogenetic procedures. Both species had diploid chromosome number 58, but different fundamental numbers (NF) 116 and 112, respectively, indicative of chromosomal rearrangements. C-banding is almost poor, especially in F. cf. amazonum, and occurs predominantly in the centromeric and in some telomeric regions, although genome of F. schreitmuelleri possessed a much larger heterochromatin amount then those of F. cf. amazonum. The chromosomes bearing the NOR sites were likely the same for both species, corresponding to the 1st metacentric pair in F. cf. amazonum and to the 28th acrocentric in F. schreitmuelleri. The location of the 5S rDNA was species-specific marker. This study expanded the available cytogenetic data for Farlowella species and pointed the remarkable karyotype diversity among species/populations, indicating a possible species complex within genus.Sociedade Brasileira de Ictiologia2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400213Neotropical Ichthyology v.16 n.4 2018reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-20180029info:eu-repo/semantics/openAccessMarajó,LeandroViana,Patrik F.Ferreira,MilenaPy-Daniel,Lúcia H. RappFeldberg,Elianaeng2019-01-28T00:00:00Zoai:scielo:S1679-62252018000400213Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2019-01-28T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
title |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
spellingShingle |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species Marajó,Leandro Amazon region Chromosomal markers Karyotypic characterization Ribosomal DNA Twig catfish |
title_short |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
title_full |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
title_fullStr |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
title_full_unstemmed |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
title_sort |
Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species |
author |
Marajó,Leandro |
author_facet |
Marajó,Leandro Viana,Patrik F. Ferreira,Milena Py-Daniel,Lúcia H. Rapp Feldberg,Eliana |
author_role |
author |
author2 |
Viana,Patrik F. Ferreira,Milena Py-Daniel,Lúcia H. Rapp Feldberg,Eliana |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Marajó,Leandro Viana,Patrik F. Ferreira,Milena Py-Daniel,Lúcia H. Rapp Feldberg,Eliana |
dc.subject.por.fl_str_mv |
Amazon region Chromosomal markers Karyotypic characterization Ribosomal DNA Twig catfish |
topic |
Amazon region Chromosomal markers Karyotypic characterization Ribosomal DNA Twig catfish |
description |
ABSTRACT Farlowella is one of the most diverse genera of the Loricariinae, restricted to South America rivers. The taxonomic and phylogenetic relationships among its species are contentious and, while genetic studies would contribute to the understanding of their relationships, the only available datum refer to the karyotype description of only one species. In the present study two Amazonian species, Farlowella cf. amazonum and F. schreitmuelleri, were analyzed using conventional and molecular cytogenetic procedures. Both species had diploid chromosome number 58, but different fundamental numbers (NF) 116 and 112, respectively, indicative of chromosomal rearrangements. C-banding is almost poor, especially in F. cf. amazonum, and occurs predominantly in the centromeric and in some telomeric regions, although genome of F. schreitmuelleri possessed a much larger heterochromatin amount then those of F. cf. amazonum. The chromosomes bearing the NOR sites were likely the same for both species, corresponding to the 1st metacentric pair in F. cf. amazonum and to the 28th acrocentric in F. schreitmuelleri. The location of the 5S rDNA was species-specific marker. This study expanded the available cytogenetic data for Farlowella species and pointed the remarkable karyotype diversity among species/populations, indicating a possible species complex within genus. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400213 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400213 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-20180029 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
dc.source.none.fl_str_mv |
Neotropical Ichthyology v.16 n.4 2018 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122182797885440 |