Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heterop...

Autores
Bressa, María José; Papeschi, Alba G.; Mola, Liliana María; Larramendy, Marcelo Luis
Año de publicación
1999
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The genus Dysdercus Guerin Meneville 1831 represents the only taxon within the family Pyrrhocoridae in the New World. Based on morphological features, it has been suggested that American species derived from immigrants from the Old World, most probably from the Ethiopian Region. So far, 10 species from Dysdercus, including six species from the Old World and four species from the Neotropical Region have been cytogenetically analyzed. As is characteristic of Heteroptera, they possess holokinetic chromosomes and a prereductional type of meiosis. While the X1X20 sex chromosome system has been reported in all cytologically analyzed species of Dysdercus from the Old World, the system X0 has been found in all but one species from the New World, regardless of the number of autosomes in the complement. In the present study the male meiosis of D. Albofasciatus Berg 1878 was studied in specimens from four different populations from Argentina. The diploid chromosome number was found to be 2n = 10 + neo-XY. The neo-X shows at each subterminal region a positively heteropycnotic and DAPI-bright segment which corresponds to the ancestral X-chromosome. The origin of this neo-XY system involved, most probably, a subterminal insertion of the ancestral X chromosome in an autosome, followed by a large inversion, which included part of the original X chromosome.
Facultad de Ciencias Naturales y Museo
Materia
Biología
Ciencias Naturales
Dysdercus albofasciatus
Heteroptera
Holokinetic chromosomes
Neo-XY
Pyrrhocoridae
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/146102

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network_name_str SEDICI (UNLP)
spelling Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in HeteropteraBressa, María JoséPapeschi, Alba G.Mola, Liliana MaríaLarramendy, Marcelo LuisBiologíaCiencias NaturalesDysdercus albofasciatusHeteropteraHolokinetic chromosomesNeo-XYPyrrhocoridaeThe genus Dysdercus Guerin Meneville 1831 represents the only taxon within the family Pyrrhocoridae in the New World. Based on morphological features, it has been suggested that American species derived from immigrants from the Old World, most probably from the Ethiopian Region. So far, 10 species from Dysdercus, including six species from the Old World and four species from the Neotropical Region have been cytogenetically analyzed. As is characteristic of Heteroptera, they possess holokinetic chromosomes and a prereductional type of meiosis. While the X1X20 sex chromosome system has been reported in all cytologically analyzed species of Dysdercus from the Old World, the system X0 has been found in all but one species from the New World, regardless of the number of autosomes in the complement. In the present study the male meiosis of D. Albofasciatus Berg 1878 was studied in specimens from four different populations from Argentina. The diploid chromosome number was found to be 2n = 10 + neo-XY. The neo-X shows at each subterminal region a positively heteropycnotic and DAPI-bright segment which corresponds to the ancestral X-chromosome. The origin of this neo-XY system involved, most probably, a subterminal insertion of the ancestral X chromosome in an autosome, followed by a large inversion, which included part of the original X chromosome.Facultad de Ciencias Naturales y Museo1999info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf503-508http://sedici.unlp.edu.ar/handle/10915/146102spainfo:eu-repo/semantics/altIdentifier/issn/0967-3849info:eu-repo/semantics/altIdentifier/issn/1573-6849info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1009262210338info:eu-repo/semantics/altIdentifier/pmid/10598565info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:07Zoai:sedici.unlp.edu.ar:10915/146102Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:08.25SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
title Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
spellingShingle Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
Bressa, María José
Biología
Ciencias Naturales
Dysdercus albofasciatus
Heteroptera
Holokinetic chromosomes
Neo-XY
Pyrrhocoridae
title_short Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
title_full Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
title_fullStr Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
title_full_unstemmed Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
title_sort Meiotic studies in Dysdercus Guerin Meneville 1831 (Heteroptera: Pyrrhocoridae) : I. Neo-XY in Dysdercus albofasciatus Berg 1878, a new sex chromosome determining system in Heteroptera
dc.creator.none.fl_str_mv Bressa, María José
Papeschi, Alba G.
Mola, Liliana María
Larramendy, Marcelo Luis
author Bressa, María José
author_facet Bressa, María José
Papeschi, Alba G.
Mola, Liliana María
Larramendy, Marcelo Luis
author_role author
author2 Papeschi, Alba G.
Mola, Liliana María
Larramendy, Marcelo Luis
author2_role author
author
author
dc.subject.none.fl_str_mv Biología
Ciencias Naturales
Dysdercus albofasciatus
Heteroptera
Holokinetic chromosomes
Neo-XY
Pyrrhocoridae
topic Biología
Ciencias Naturales
Dysdercus albofasciatus
Heteroptera
Holokinetic chromosomes
Neo-XY
Pyrrhocoridae
dc.description.none.fl_txt_mv The genus Dysdercus Guerin Meneville 1831 represents the only taxon within the family Pyrrhocoridae in the New World. Based on morphological features, it has been suggested that American species derived from immigrants from the Old World, most probably from the Ethiopian Region. So far, 10 species from Dysdercus, including six species from the Old World and four species from the Neotropical Region have been cytogenetically analyzed. As is characteristic of Heteroptera, they possess holokinetic chromosomes and a prereductional type of meiosis. While the X1X20 sex chromosome system has been reported in all cytologically analyzed species of Dysdercus from the Old World, the system X0 has been found in all but one species from the New World, regardless of the number of autosomes in the complement. In the present study the male meiosis of D. Albofasciatus Berg 1878 was studied in specimens from four different populations from Argentina. The diploid chromosome number was found to be 2n = 10 + neo-XY. The neo-X shows at each subterminal region a positively heteropycnotic and DAPI-bright segment which corresponds to the ancestral X-chromosome. The origin of this neo-XY system involved, most probably, a subterminal insertion of the ancestral X chromosome in an autosome, followed by a large inversion, which included part of the original X chromosome.
Facultad de Ciencias Naturales y Museo
description The genus Dysdercus Guerin Meneville 1831 represents the only taxon within the family Pyrrhocoridae in the New World. Based on morphological features, it has been suggested that American species derived from immigrants from the Old World, most probably from the Ethiopian Region. So far, 10 species from Dysdercus, including six species from the Old World and four species from the Neotropical Region have been cytogenetically analyzed. As is characteristic of Heteroptera, they possess holokinetic chromosomes and a prereductional type of meiosis. While the X1X20 sex chromosome system has been reported in all cytologically analyzed species of Dysdercus from the Old World, the system X0 has been found in all but one species from the New World, regardless of the number of autosomes in the complement. In the present study the male meiosis of D. Albofasciatus Berg 1878 was studied in specimens from four different populations from Argentina. The diploid chromosome number was found to be 2n = 10 + neo-XY. The neo-X shows at each subterminal region a positively heteropycnotic and DAPI-bright segment which corresponds to the ancestral X-chromosome. The origin of this neo-XY system involved, most probably, a subterminal insertion of the ancestral X chromosome in an autosome, followed by a large inversion, which included part of the original X chromosome.
publishDate 1999
dc.date.none.fl_str_mv 1999
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/146102
url http://sedici.unlp.edu.ar/handle/10915/146102
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0967-3849
info:eu-repo/semantics/altIdentifier/issn/1573-6849
info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1009262210338
info:eu-repo/semantics/altIdentifier/pmid/10598565
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
503-508
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