Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)

Autores
Tombesi, M.L.; Papeschi, A.G.
Año de publicación
1993
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Haemalopinus suis (Anoplura) and Menacanthus stramineus (Mallophaga) have been cytogenetically analyzed. Both species have 2n = 10, holokinetic chromosomes, and achiasmatic male meiosis. Bivalents orientate with their long axis perpendicular to the spindle fibers at melaphase I, and first anaphase is reductional. As in other species of Phthiraptera, male gametogenesis follows a particular pattern: each cell entering meiosis results in a cyst of 64 (in H. suis) and 32 (in M. stramineus) spermatozoa and 64/32 non‐functional cells (=pycnotic nuclei). The results are compared with those previously reported for Phthiraptera, and a new terminology for the different stages of male gametogenesis is proposed. The low chromosome number together with the achiasmatic nature of male meiosis and the mitotic divisions that follow meiosis may restrict the potential for genetic variability. This might be related to the high host specificity of these parasites. Copyright © 1993, Wiley Blackwell. All rights reserved
Fil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Hereditas 1993;119(1):31-38
Materia
animal cell
article
female
male
meiosis
nonhuman
oocyte maturation
parasite
spermatogenesis
swine
Animalia
Haematopinus suis
Insecta
Menacanthus
Phthiraptera
Sus scrofa
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00180661_v119_n1_p31_Tombesi

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oai_identifier_str paperaa:paper_00180661_v119_n1_p31_Tombesi
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)Tombesi, M.L.Papeschi, A.G.animal cellarticlefemalemalemeiosisnonhumanoocyte maturationparasitespermatogenesisswineAnimaliaHaematopinus suisInsectaMenacanthusPhthirapteraSus scrofaHaemalopinus suis (Anoplura) and Menacanthus stramineus (Mallophaga) have been cytogenetically analyzed. Both species have 2n = 10, holokinetic chromosomes, and achiasmatic male meiosis. Bivalents orientate with their long axis perpendicular to the spindle fibers at melaphase I, and first anaphase is reductional. As in other species of Phthiraptera, male gametogenesis follows a particular pattern: each cell entering meiosis results in a cyst of 64 (in H. suis) and 32 (in M. stramineus) spermatozoa and 64/32 non‐functional cells (=pycnotic nuclei). The results are compared with those previously reported for Phthiraptera, and a new terminology for the different stages of male gametogenesis is proposed. The low chromosome number together with the achiasmatic nature of male meiosis and the mitotic divisions that follow meiosis may restrict the potential for genetic variability. This might be related to the high host specificity of these parasites. Copyright © 1993, Wiley Blackwell. All rights reservedFil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.1993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00180661_v119_n1_p31_TombesiHereditas 1993;119(1):31-38reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:43:09Zpaperaa:paper_00180661_v119_n1_p31_TombesiInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:43:10.75Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
title Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
spellingShingle Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
Tombesi, M.L.
animal cell
article
female
male
meiosis
nonhuman
oocyte maturation
parasite
spermatogenesis
swine
Animalia
Haematopinus suis
Insecta
Menacanthus
Phthiraptera
Sus scrofa
title_short Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
title_full Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
title_fullStr Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
title_full_unstemmed Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
title_sort Meiosis in Haematopinus Suis and Menacanthus Stramineus (Phthiraptera, Insecta)
dc.creator.none.fl_str_mv Tombesi, M.L.
Papeschi, A.G.
author Tombesi, M.L.
author_facet Tombesi, M.L.
Papeschi, A.G.
author_role author
author2 Papeschi, A.G.
author2_role author
dc.subject.none.fl_str_mv animal cell
article
female
male
meiosis
nonhuman
oocyte maturation
parasite
spermatogenesis
swine
Animalia
Haematopinus suis
Insecta
Menacanthus
Phthiraptera
Sus scrofa
topic animal cell
article
female
male
meiosis
nonhuman
oocyte maturation
parasite
spermatogenesis
swine
Animalia
Haematopinus suis
Insecta
Menacanthus
Phthiraptera
Sus scrofa
dc.description.none.fl_txt_mv Haemalopinus suis (Anoplura) and Menacanthus stramineus (Mallophaga) have been cytogenetically analyzed. Both species have 2n = 10, holokinetic chromosomes, and achiasmatic male meiosis. Bivalents orientate with their long axis perpendicular to the spindle fibers at melaphase I, and first anaphase is reductional. As in other species of Phthiraptera, male gametogenesis follows a particular pattern: each cell entering meiosis results in a cyst of 64 (in H. suis) and 32 (in M. stramineus) spermatozoa and 64/32 non‐functional cells (=pycnotic nuclei). The results are compared with those previously reported for Phthiraptera, and a new terminology for the different stages of male gametogenesis is proposed. The low chromosome number together with the achiasmatic nature of male meiosis and the mitotic divisions that follow meiosis may restrict the potential for genetic variability. This might be related to the high host specificity of these parasites. Copyright © 1993, Wiley Blackwell. All rights reserved
Fil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Haemalopinus suis (Anoplura) and Menacanthus stramineus (Mallophaga) have been cytogenetically analyzed. Both species have 2n = 10, holokinetic chromosomes, and achiasmatic male meiosis. Bivalents orientate with their long axis perpendicular to the spindle fibers at melaphase I, and first anaphase is reductional. As in other species of Phthiraptera, male gametogenesis follows a particular pattern: each cell entering meiosis results in a cyst of 64 (in H. suis) and 32 (in M. stramineus) spermatozoa and 64/32 non‐functional cells (=pycnotic nuclei). The results are compared with those previously reported for Phthiraptera, and a new terminology for the different stages of male gametogenesis is proposed. The low chromosome number together with the achiasmatic nature of male meiosis and the mitotic divisions that follow meiosis may restrict the potential for genetic variability. This might be related to the high host specificity of these parasites. Copyright © 1993, Wiley Blackwell. All rights reserved
publishDate 1993
dc.date.none.fl_str_mv 1993
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_00180661_v119_n1_p31_Tombesi
url http://hdl.handle.net/20.500.12110/paper_00180661_v119_n1_p31_Tombesi
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Hereditas 1993;119(1):31-38
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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