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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/146102
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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 http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
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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 |
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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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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