Trends in the karyotypic evolution of the Neotropical catfish family Heptapteridae Bockmann 1998 (Teleostei: Siluriformes)

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dc.contributor.authorde Borba, Rafael Splendore [UNESP]
dc.contributor.authorda Silva, Edson Lourenco [UNESP]
dc.contributor.authorSales Pacheco, Ana Carolina [UNESP]
dc.contributor.authorParise-Maltempi, Patricia Pasquali [UNESP]
dc.contributor.authorAlves, Anderson Luis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:55:32Z
dc.date.available2014-05-20T13:55:32Z
dc.date.issued2012-06-01
dc.description.abstractThe Heptapteridae family is endemic to the Neotropics and is one of the most representative members of the Siluriformes order in small bodies of water. Due the lack of data for clearly distinguishing their species, only recently was elevated from condition of subfamily to family. However, many doubts about certain species remain yet. There are a relatively large number of cytogenetics studies about heptapterids that permits comparative analyses focused in the karyotype evolution of the group. However, the absence of studies about this theme motivated this work. Were analyzed cytogenetically most representative species of the family: , and compared with available data from the family. The comparative analysis indicated the predominance of biarmed chromosomes and low variation of the diploid number (around 2n = 58) suggesting that centric inversions were more important than centric fissions in the history of heptapterids. It is corroborated by a remarkable number of NOR phenotypes mainly in and species. A probable condition of Heptapteridae plesiomorphic karyotype would be one composed of 2n = 58 chromosomes of types metacentric and submetacentric mainly, with simple NOR at the sub terminal position. The reduction of diploid number, it would possibly through successive events of chromosome fusion with deletions and inversion rearrangements responsible for NOR variation within the certain genus. The occurrence of B chromosomes is from a derived event, possibly of recent origin, without phylogenetic implications.en
dc.description.affiliationUNESP Univ Estadual Paulista Julio de Mesquita Fi, Inst Biociencias, Dept Biol, Lab Citogenet, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista Julio de Mesquita Fi, Inst Biociencias, Dept Biol, Lab Citogenet, BR-13506900 Rio Claro, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent509-518
dc.identifierhttp://dx.doi.org/10.1007/s11160-011-9245-3
dc.identifier.citationReviews In Fish Biology and Fisheries. Dordrecht: Springer, v. 22, n. 2, p. 509-518, 2012.
dc.identifier.doi10.1007/s11160-011-9245-3
dc.identifier.issn0960-3166
dc.identifier.urihttp://hdl.handle.net/11449/19875
dc.identifier.wosWOS:000303894300010
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofReviews in Fish Biology and Fisheries
dc.relation.ispartofjcr3.299
dc.relation.ispartofsjr1,800
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectChromosomeen
dc.subjectKaryotypic diversityen
dc.subjectAg-NORen
dc.subjectC-banden
dc.subject18S rDNAen
dc.titleTrends in the karyotypic evolution of the Neotropical catfish family Heptapteridae Bockmann 1998 (Teleostei: Siluriformes)en
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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