Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)

Spontaneous centric fusions were detected in two natural populations, Raco (RA) and Tafi Viejo (TV), of Dichroplus elongatus from Tucuman Province (Argentina). In TV one male carried centric fusion between autosomes L3 and M4 (3/4 fusion). One male from RA showed two centric fusions, one between the...

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Autores principales: Clemente, M., Remis, M.I., Vilardi, J.C.
Formato: JOUR
Materias:
centric fusion
chiasmata
grasshopper
spontaneous chromosome mutations
Dichroplus elongatus
Orthoptera
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00114545_v61_n2_p155_Clemente
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00114545_v61_n2_p155_Clemente
record_format dspace
spelling todo:paper_00114545_v61_n2_p155_Clemente2023-10-03T14:09:49Z Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera) Clemente, M. Remis, M.I. Vilardi, J.C. centric fusion chiasmata grasshopper spontaneous chromosome mutations Dichroplus elongatus Orthoptera Spontaneous centric fusions were detected in two natural populations, Raco (RA) and Tafi Viejo (TV), of Dichroplus elongatus from Tucuman Province (Argentina). In TV one male carried centric fusion between autosomes L3 and M4 (3/4 fusion). One male from RA showed two centric fusions, one between the X and M5 (X/5) and the other between autosomes L1 and M4 (1/4) (in homozygous condition). A significant reduction in the number of chiasmata in the fused bivalents or trivalents with respect to standard karyotypes was observed in all cases except the M4 arm of the 1/4 fusion. Significant chiasma redistribution towards more distal positions was observed in the L1 arm of the 1/4 fusion, the L3 arm of the 3/4 fusion and the L5 arm of the X/5 fusion. These results revealed that a) some fusions per se may affect chiasma conditions, b) the intensity of such effect varies among chromosome pairs. Fil:Clemente, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Remis, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilardi, J.C. 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_00114545_v61_n2_p155_Clemente
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic centric fusion
chiasmata
grasshopper
spontaneous chromosome mutations
Dichroplus elongatus
Orthoptera
spellingShingle centric fusion
chiasmata
grasshopper
spontaneous chromosome mutations
Dichroplus elongatus
Orthoptera
Clemente, M.
Remis, M.I.
Vilardi, J.C.
Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
topic_facet centric fusion
chiasmata
grasshopper
spontaneous chromosome mutations
Dichroplus elongatus
Orthoptera
description Spontaneous centric fusions were detected in two natural populations, Raco (RA) and Tafi Viejo (TV), of Dichroplus elongatus from Tucuman Province (Argentina). In TV one male carried centric fusion between autosomes L3 and M4 (3/4 fusion). One male from RA showed two centric fusions, one between the X and M5 (X/5) and the other between autosomes L1 and M4 (1/4) (in homozygous condition). A significant reduction in the number of chiasmata in the fused bivalents or trivalents with respect to standard karyotypes was observed in all cases except the M4 arm of the 1/4 fusion. Significant chiasma redistribution towards more distal positions was observed in the L1 arm of the 1/4 fusion, the L3 arm of the 3/4 fusion and the L5 arm of the X/5 fusion. These results revealed that a) some fusions per se may affect chiasma conditions, b) the intensity of such effect varies among chromosome pairs.
format JOUR
author Clemente, M.
Remis, M.I.
Vilardi, J.C.
author_facet Clemente, M.
Remis, M.I.
Vilardi, J.C.
author_sort Clemente, M.
title Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
title_short Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
title_full Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
title_fullStr Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
title_full_unstemmed Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
title_sort spontaneous centric fusions affecting chiasma conditions in dichroplus elongatus (orthoptera)
url http://hdl.handle.net/20.500.12110/paper_00114545_v61_n2_p155_Clemente
work_keys_str_mv AT clementem spontaneouscentricfusionsaffectingchiasmaconditionsindichropluselongatusorthoptera
AT remismi spontaneouscentricfusionsaffectingchiasmaconditionsindichropluselongatusorthoptera
AT vilardijc spontaneouscentricfusionsaffectingchiasmaconditionsindichropluselongatusorthoptera
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