Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera

dc.contributor.authorCastanhole, M. M. U. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:34:18Z
dc.date.available2014-05-20T15:34:18Z
dc.date.issued2009-01-01
dc.description.abstractAspects of spermatogenesis and nucleolar behavior were analyzed in Brachymetra albinerva, Cylindrostethus palmaris, Halobatopsis platensis, Limnogonus aduncus (Gerridae), Martarega sp (Notonectidae), Rhagovelia whitei, and Rhagovelia sp (Veliidae). The testicles are rounded (Veliidae), elongated (Gerridae) or spiral (Notonectidae) and have a transparent membrane covering them. The complement chromosome was 2n = 23 (22A + X0, L. aduncus and Rhagovelia sp), 25 (24A + X0, B. albinerva and H. platensis), 26 (22A + 2m + XY, Martarega sp), 29 (28A + X0, C. palmaris), or 39 (38A + X0, R. whitei) chromosomes, and the only species with a different sex chromosome system was Martarega sp, which showed an XY system and m-chromosomes. The meiotic behavior of all species was similar: holocentric chromosomes and heteropyknotic material at prophase, interstitial and/or terminal chiasmata, and first reductional division for the autosomes and the reverse for the sex chromosomes. The only difference observed was related to the very large size of Martarega sp cells in all stages of spermatogenesis. With regard to nucleolar behavior, the species did not show differences, except for Martarega sp with larger nucleoli than the other species. The only species in which it was clearly possible to identify the nucleolar organizer region was L. aduncus, in the region of a terminal autosome. It was also confirmed that the telomeric associations do not occur at random. In the other species, specific staining was very discrete, and the nucleolar organizer region location was not at all evident.en
dc.description.affiliationUniv Paulista Julio de Mesquita Filho, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUnespUniv Paulista Julio de Mesquita Filho, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, Brazil
dc.format.extent816-816
dc.identifierhttp://www.geneticsmr.com/articles/690
dc.identifier.citationGenetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 8, n. 3, p. 816-816, 2009.
dc.identifier.doi10.4238/vol8-3ta019
dc.identifier.fileWOS000268634100005.pdf
dc.identifier.issn1676-5680
dc.identifier.urihttp://hdl.handle.net/11449/42499
dc.identifier.wosWOS:000268634100005
dc.language.isoeng
dc.publisherFunpec-editora
dc.relation.ispartofGenetics and Molecular Research
dc.relation.ispartofsjr0,439
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectAquatic Heteropteraen
dc.subjectGerridaeen
dc.subjectNotonectidaeen
dc.subjectVeliidaeen
dc.subjectMeiosisen
dc.subjectNucleolar behavioren
dc.titleSpermatogenesis and nucleolar behavior in males of aquatic Heteropteraen
dc.typeArtigo
dcterms.licensehttp://www.geneticsmr.com/node/2
dcterms.rightsHolderFunpec-editora

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