Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)

The grasshopper Leptysma argentina possesses a highly polymorphic karyotype which suggests that the species is undergoing a period of intensive chromosomal restructuration and evolution. The two populations studied in this work showed: (1) Polymorphism for a centric fusion between two telocentric au...

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Autores principales: Bidau, C.J., Hasson, E.R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00166707_v62_n3_p161_Bidau
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00166707_v62_n3_p161_Bidau2023-10-03T14:14:22Z Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae) Bidau, C.J. Hasson, E.R. The grasshopper Leptysma argentina possesses a highly polymorphic karyotype which suggests that the species is undergoing a period of intensive chromosomal restructuration and evolution. The two populations studied in this work showed: (1) Polymorphism for a centric fusion between two telocentric autosomes; (2) Polymorphism for an interstitial supernumerary segment in the smallest autosome; (3) Presence of a proximal supernumerary segment in the second smallest autosome; (4) Polymorphism for a B-chromosome; (5) Heterozygosity for a complex spontaneous translocation between autosomes; (6) At least two centric shifts in two pairs of autosomes. Another interesting feature of the cytogenetics of these populations was the occurrence, in a relatively high frequency, of dicentric bridges and acentric fragments in Anaphase I probably due to errors in crossing-over. © 1984 Dr W. Junk Publishers. Fil:Bidau, C.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Hasson, E.R. 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_00166707_v62_n3_p161_Bidau
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The grasshopper Leptysma argentina possesses a highly polymorphic karyotype which suggests that the species is undergoing a period of intensive chromosomal restructuration and evolution. The two populations studied in this work showed: (1) Polymorphism for a centric fusion between two telocentric autosomes; (2) Polymorphism for an interstitial supernumerary segment in the smallest autosome; (3) Presence of a proximal supernumerary segment in the second smallest autosome; (4) Polymorphism for a B-chromosome; (5) Heterozygosity for a complex spontaneous translocation between autosomes; (6) At least two centric shifts in two pairs of autosomes. Another interesting feature of the cytogenetics of these populations was the occurrence, in a relatively high frequency, of dicentric bridges and acentric fragments in Anaphase I probably due to errors in crossing-over. © 1984 Dr W. Junk Publishers.
format JOUR
author Bidau, C.J.
Hasson, E.R.
spellingShingle Bidau, C.J.
Hasson, E.R.
Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
author_facet Bidau, C.J.
Hasson, E.R.
author_sort Bidau, C.J.
title Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
title_short Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
title_full Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
title_fullStr Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
title_full_unstemmed Population cytology of Leptysma argentina Bruner (Leptysminae, Acrididae)
title_sort population cytology of leptysma argentina bruner (leptysminae, acrididae)
url http://hdl.handle.net/20.500.12110/paper_00166707_v62_n3_p161_Bidau
work_keys_str_mv AT bidaucj populationcytologyofleptysmaargentinabrunerleptysminaeacrididae
AT hassoner populationcytologyofleptysmaargentinabrunerleptysminaeacrididae
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