Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)

In Mormidea paupercula (n = 6 + XY in males), the presence of a CMA3-bright band in the telomeric regions on both sex chromosomes allowed the analysis of the kinetic activity of the sex univalents and XY pseudobivalent at the first and second meiotic divisions, respectively. The separation of the si...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rebagliati, P.J., Mola, L.M.
Formato: JOUR
Materias:
Heteroptera
Holokinetic chromosomes
Kinetic activity
Meiosis
Mormidea
Pentatomidae
Sex chromosomes
chromosome
cytogenetics
insect
sexual reproduction
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_12105759_v107_n3_p317_Rebagliati
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_12105759_v107_n3_p317_Rebagliati
record_format dspace
spelling todo:paper_12105759_v107_n3_p317_Rebagliati2023-10-03T16:09:00Z Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae) Rebagliati, P.J. Mola, L.M. Heteroptera Holokinetic chromosomes Kinetic activity Meiosis Mormidea Pentatomidae Sex chromosomes chromosome cytogenetics insect sexual reproduction Heteroptera Mormidea Pentatomidae In Mormidea paupercula (n = 6 + XY in males), the presence of a CMA3-bright band in the telomeric regions on both sex chromosomes allowed the analysis of the kinetic activity of the sex univalents and XY pseudobivalent at the first and second meiotic divisions, respectively. The separation of the sister chromatids of the sex chromosomes occurs from a pair of telomeric regions (with or without a band), with opposite telomeric regions remaining associated with each other at meiosis I; the behaviour of both sex chromosomes differs, on the X chromosome both telomeric regions are similarly active, while on the Y chromosome the telomeric region without a band is more frequently active. At the second division, the most frequent associations in the pseudobivalent occur between the telomeric regions of both sex chromosomes with bands or without bands. Therefore, in both meiotic divisions, the same telomeric region on the sex chromosomes could lead the migration, in contrast to that observed usually in autosomal bivalents. These results provide evidence that the sex chromosomes of Heteroptera show more than one pattern of attachment to the spindle. © 2003 Institute of Entomology. Fil:Rebagliati, P.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mola, L.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_12105759_v107_n3_p317_Rebagliati
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Heteroptera
Holokinetic chromosomes
Kinetic activity
Meiosis
Mormidea
Pentatomidae
Sex chromosomes
chromosome
cytogenetics
insect
sexual reproduction
Heteroptera
Mormidea
Pentatomidae
spellingShingle Heteroptera
Holokinetic chromosomes
Kinetic activity
Meiosis
Mormidea
Pentatomidae
Sex chromosomes
chromosome
cytogenetics
insect
sexual reproduction
Heteroptera
Mormidea
Pentatomidae
Rebagliati, P.J.
Mola, L.M.
Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
topic_facet Heteroptera
Holokinetic chromosomes
Kinetic activity
Meiosis
Mormidea
Pentatomidae
Sex chromosomes
chromosome
cytogenetics
insect
sexual reproduction
Heteroptera
Mormidea
Pentatomidae
description In Mormidea paupercula (n = 6 + XY in males), the presence of a CMA3-bright band in the telomeric regions on both sex chromosomes allowed the analysis of the kinetic activity of the sex univalents and XY pseudobivalent at the first and second meiotic divisions, respectively. The separation of the sister chromatids of the sex chromosomes occurs from a pair of telomeric regions (with or without a band), with opposite telomeric regions remaining associated with each other at meiosis I; the behaviour of both sex chromosomes differs, on the X chromosome both telomeric regions are similarly active, while on the Y chromosome the telomeric region without a band is more frequently active. At the second division, the most frequent associations in the pseudobivalent occur between the telomeric regions of both sex chromosomes with bands or without bands. Therefore, in both meiotic divisions, the same telomeric region on the sex chromosomes could lead the migration, in contrast to that observed usually in autosomal bivalents. These results provide evidence that the sex chromosomes of Heteroptera show more than one pattern of attachment to the spindle. © 2003 Institute of Entomology.
format JOUR
author Rebagliati, P.J.
Mola, L.M.
author_facet Rebagliati, P.J.
Mola, L.M.
author_sort Rebagliati, P.J.
title Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
title_short Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
title_full Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
title_fullStr Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
title_full_unstemmed Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)
title_sort kinetic activity of the sex chromosomes of mormidea paupercula (heteroptera: pentatomidae)
url http://hdl.handle.net/20.500.12110/paper_12105759_v107_n3_p317_Rebagliati
work_keys_str_mv AT rebagliatipj kineticactivityofthesexchromosomesofmormideapauperculaheteropterapentatomidae
AT molalm kineticactivityofthesexchromosomesofmormideapauperculaheteropterapentatomidae
_version_ 1782023792246128640

Ejemplares similares