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
- Institución
- Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
- OAI Identificador
- paperaa:paper_00180661_v119_n1_p31_Tombesi
Ver los metadatos del registro completo
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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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1844618740745895936 |
score |
13.070432 |