ZZ/ZW sex chromosome system in the endangered fish Lignobrycon myersi Miranda-Ribeiro, 1956 (Teleostei, Characiformes, Triportheidae)

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dc.contributor.authorRodrigues, Alexandre dos Santos
dc.contributor.authorMedrado, Aline Souza
dc.contributor.authorDiniz, Debora
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorAntunes de Mello Affonso, Paulo Roberto
dc.contributor.institutionUniv Estadual Sudoeste Bahia UESB
dc.contributor.institutionUniv Estadual Santa Cruz
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:06:19Z
dc.date.available2018-11-26T17:06:19Z
dc.date.issued2016-01-01
dc.description.abstractLignobrycon myersi is an endemic fish species from a few coastal rivers in northeastern Brazil. Based on molecular evidence, L. myersi and genera Triportheus Cope, 1872, Agoniates Muller & Troschel, 1845, Clupeacharax Pearson, 1924 and Engraulisoma Castro, 1981 were placed in the family Triportheidae. In the present work, we report the first cytogenetic data for L. myersi to test the hypothesis that Lignobrycon and Triportheus are closely related. Studied specimens presented 2n=52 with 28 metacentric (m), 18 submetacentric (sm) and six subtelocentric (st) chromosomes for males and 27 m, 19 sm and 6 st for females, characterizing a ZZ/ZW sex chromosome system. The Z chromosome corresponds to the largest chromosome in karyotype while the W is about 50% smaller than the Z and largely heterochromatic. Terminal nucleolus organizer regions, GC- rich sites and 18S rDNA signals were detected on pair 14. However, additional 18S rDNA sites were observed in the W chromosome. The 5S rDNA was mainly detected on long arms of pair 7. The apparent synapomorphic chromosomal traits of Triportheus and L. myersi reinforce their close phylogenetic relationship, suggesting that the ZZ/ZW chromosome system in both genera has arisen before cladogenic events.en
dc.description.affiliationUniv Estadual Sudoeste Bahia UESB, Dept Ciencias Biol, Av Jose Moreira Sobrinho S-N, BR-45206190 Jequie, BA, Brazil
dc.description.affiliationUniv Estadual Santa Cruz, Campus Soane Nazare Andrade,Rodovia Jorge Amado, BR-45662900 Ilheus, BA, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Morfol, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Morfol, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipPrograma de Formacao de Recursos Humanos da Petrobras
dc.description.sponsorshipFAPESB
dc.description.sponsorshipIdPrograma de Formacao de Recursos Humanos da Petrobras: PRH-PB 211
dc.description.sponsorshipIdFAPESB: PNE0019/2011
dc.description.sponsorshipIdFAPESB: RED0009/2013
dc.format.extent245-254
dc.identifierhttp://dx.doi.org/10.3897/CompCytogen.v10i2.8435
dc.identifier.citationComparative Cytogenetics. Sofia: Pensoft Publ, v. 10, n. 2, p. 245-254, 2016.
dc.identifier.doi10.3897/CompCytogen.v10i2.8435
dc.identifier.issn1993-0771
dc.identifier.urihttp://hdl.handle.net/11449/161956
dc.identifier.wosWOS:000383895600004
dc.language.isoeng
dc.publisherPensoft Publ
dc.relation.ispartofComparative Cytogenetics
dc.relation.ispartofsjr0,431
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectEvolution
dc.subjectfemale heterogamety
dc.subjectrDNA
dc.subjectsex determination
dc.subjectTriportheus
dc.titleZZ/ZW sex chromosome system in the endangered fish Lignobrycon myersi Miranda-Ribeiro, 1956 (Teleostei, Characiformes, Triportheidae)en
dc.typeArtigo
dcterms.rightsHolderPensoft Publ
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