Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.geneticsmr.com/articles/690 http://hdl.handle.net/11449/42499 |
Resumo: | Aspects 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. |
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Spermatogenesis and nucleolar behavior in males of aquatic HeteropteraAquatic HeteropteraGerridaeNotonectidaeVeliidaeMeiosisNucleolar behaviorAspects 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.Univ Paulista Julio de Mesquita Filho, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, BrazilUniv Paulista Julio de Mesquita Filho, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, BrazilFunpec-editoraUniversidade Estadual Paulista (Unesp)Castanhole, M. M. U. [UNESP]2014-05-20T15:34:18Z2014-05-20T15:34:18Z2009-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article816-816application/pdfhttp://www.geneticsmr.com/articles/690Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 8, n. 3, p. 816-816, 2009.1676-5680http://hdl.handle.net/11449/4249910.4238/vol8-3ta019WOS:000268634100005WOS000268634100005.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGenetics and Molecular Research0,439info:eu-repo/semantics/openAccess2023-12-30T06:19:58Zoai:repositorio.unesp.br:11449/42499Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-30T06:19:58Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
title |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
spellingShingle |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera Castanhole, M. M. U. [UNESP] Aquatic Heteroptera Gerridae Notonectidae Veliidae Meiosis Nucleolar behavior |
title_short |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
title_full |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
title_fullStr |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
title_full_unstemmed |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
title_sort |
Spermatogenesis and nucleolar behavior in males of aquatic Heteroptera |
author |
Castanhole, M. M. U. [UNESP] |
author_facet |
Castanhole, M. M. U. [UNESP] |
author_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Castanhole, M. M. U. [UNESP] |
dc.subject.por.fl_str_mv |
Aquatic Heteroptera Gerridae Notonectidae Veliidae Meiosis Nucleolar behavior |
topic |
Aquatic Heteroptera Gerridae Notonectidae Veliidae Meiosis Nucleolar behavior |
description |
Aspects 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. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 2014-05-20T15:34:18Z 2014-05-20T15:34:18Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.geneticsmr.com/articles/690 Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 8, n. 3, p. 816-816, 2009. 1676-5680 http://hdl.handle.net/11449/42499 10.4238/vol8-3ta019 WOS:000268634100005 WOS000268634100005.pdf |
url |
http://www.geneticsmr.com/articles/690 http://hdl.handle.net/11449/42499 |
identifier_str_mv |
Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 8, n. 3, p. 816-816, 2009. 1676-5680 10.4238/vol8-3ta019 WOS:000268634100005 WOS000268634100005.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Genetics and Molecular Research 0,439 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
816-816 application/pdf |
dc.publisher.none.fl_str_mv |
Funpec-editora |
publisher.none.fl_str_mv |
Funpec-editora |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965457782931456 |