Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948

<i>Dysdercus</i> Guerin Meneville, 1831 comprises insect species that are often serious pests of cotton both in the Old and New World, representing the only taxon from Pyrrhocoridae in the Neotropical Region. The genus is cytologically characterized by possession of holokinetic chromosom...

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Autores principales: Bressa, María José, Fumagalli, Emiliano, Ituarte, Santiago, Frassa, María Victoria, Larramendy, Marcelo Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Naturales
Dysdercus
Dysdercus chaquensis
Meiosis
diffuse stage
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128205
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128205
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Dysdercus
Dysdercus chaquensis
Meiosis
diffuse stage
spellingShingle Ciencias Naturales
Dysdercus
Dysdercus chaquensis
Meiosis
diffuse stage
Bressa, María José
Fumagalli, Emiliano
Ituarte, Santiago
Frassa, María Victoria
Larramendy, Marcelo Luis
Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
topic_facet Ciencias Naturales
Dysdercus
Dysdercus chaquensis
Meiosis
diffuse stage
description <i>Dysdercus</i> Guerin Meneville, 1831 comprises insect species that are often serious pests of cotton both in the Old and New World, representing the only taxon from Pyrrhocoridae in the Neotropical Region. The genus is cytologically characterized by possession of holokinetic chromosomes and a prereductional type of meiosis. So far, only seven species from the Old World and five species from the Neotropical Region have been cytogenetically described. In the present report we compare the male meiosis from both natural and inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948. Our results demonstrated that even though both populations share the same diploid chromosome number, the presence of a diffuse stage was found to be committed to the wild population of the species. Furthermore, the diffuse stage was found in a high frequency in all analysed wild specimens, indicating the long duration of this period among the regular meiosis of <i>D. chaquensis</i>. Taking into account that the diffuse stage is connected with an intense and long period of cellular growth, and with an important transcriptional activity, the absence of this stage in all the inbred specimens of <i>D. chaquensis</i> could be related with the lack of unfavourable physiological conditions due to the environmental uniformity along seven years of inbreeding.
format Articulo
Articulo
author Bressa, María José
Fumagalli, Emiliano
Ituarte, Santiago
Frassa, María Victoria
Larramendy, Marcelo Luis
author_facet Bressa, María José
Fumagalli, Emiliano
Ituarte, Santiago
Frassa, María Victoria
Larramendy, Marcelo Luis
author_sort Bressa, María José
title Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
title_short Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
title_full Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
title_fullStr Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
title_full_unstemmed Meiotic studies in <i>Dysdercus</i> Guérin Meneville, 1831 (Heteroptera: Pyrrhocoridae) : II. Evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>Dysdercus chaquensis</i> Freiberg, 1948
title_sort meiotic studies in <i>dysdercus</i> guérin meneville, 1831 (heteroptera: pyrrhocoridae) : ii. evidence on variations of the diffuse stage between wild and laboratory-inbred populations of <i>dysdercus chaquensis</i> freiberg, 1948
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/128205
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