Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)

The populations of National Park «El Palmar» (Entre Rios Province, Argentina) of Sinipta dalmani are polymorphic for a pericentric inversion and a centric fusion (REMIS 1989b, 1990). The percentage of normal and abnormal (macro and micro) spermatids was asessed in order to evaluate the influence of...

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Autor principal: Remis, M.I.
Formato: JOUR
Materias:
Centric fusion
Grasshoppers
Pericentric inversion
Sperm formation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00087114_v46_n4_p321_Remis
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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_00087114_v46_n4_p321_Remis2023-10-03T14:07:46Z Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae) Remis, M.I. Centric fusion Grasshoppers Pericentric inversion Sperm formation The populations of National Park «El Palmar» (Entre Rios Province, Argentina) of Sinipta dalmani are polymorphic for a pericentric inversion and a centric fusion (REMIS 1989b, 1990). The percentage of normal and abnormal (macro and micro) spermatids was asessed in order to evaluate the influence of these rearrangements on sperm formation. The pericentric inversion does not associate significantly with macrospermatid formation. On the contrary, microspermatid production and a significant increase in the frequency of macrospermatids are observed in centric fusion carriers. The DNA content of giant spermatids was mainly 2c, suggesting that there may be any meiotic misbehaviour during meiosis. However, 3c to 5c macrospermatids were also found; hence, other mechanism, such as cell fusion, may be involved in the production of abnormal sperm. Although this influence may affect any component of fitness in a negative way, it ought to be counterbalanced by any adaptive effect or else by meiotic drive in order to explain the maintenance of the centric fusion in natural populations. © 1993 Taylor & Francis Group, LLC. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00087114_v46_n4_p321_Remis
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
Grasshoppers
Pericentric inversion
Sperm formation
spellingShingle Centric fusion
Grasshoppers
Pericentric inversion
Sperm formation
Remis, M.I.
Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
topic_facet Centric fusion
Grasshoppers
Pericentric inversion
Sperm formation
description The populations of National Park «El Palmar» (Entre Rios Province, Argentina) of Sinipta dalmani are polymorphic for a pericentric inversion and a centric fusion (REMIS 1989b, 1990). The percentage of normal and abnormal (macro and micro) spermatids was asessed in order to evaluate the influence of these rearrangements on sperm formation. The pericentric inversion does not associate significantly with macrospermatid formation. On the contrary, microspermatid production and a significant increase in the frequency of macrospermatids are observed in centric fusion carriers. The DNA content of giant spermatids was mainly 2c, suggesting that there may be any meiotic misbehaviour during meiosis. However, 3c to 5c macrospermatids were also found; hence, other mechanism, such as cell fusion, may be involved in the production of abnormal sperm. Although this influence may affect any component of fitness in a negative way, it ought to be counterbalanced by any adaptive effect or else by meiotic drive in order to explain the maintenance of the centric fusion in natural populations. © 1993 Taylor & Francis Group, LLC.
format JOUR
author Remis, M.I.
author_facet Remis, M.I.
author_sort Remis, M.I.
title Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
title_short Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
title_full Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
title_fullStr Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
title_full_unstemmed Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
title_sort effects of chromosome rearrangements on sperm formation in sinipta dalmani (orthoptera: acrididae)
url http://hdl.handle.net/20.500.12110/paper_00087114_v46_n4_p321_Remis
work_keys_str_mv AT remismi effectsofchromosomerearrangementsonspermformationinsiniptadalmaniorthopteraacrididae
_version_ 1807315252083163136

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