Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media

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Erythrodiplax is an American genus of dragonflies with a mainly neotropical distribution and with 19 species cited in Argentine. In this work 9 species have been chromosomically analyzed: E. atroterminata, E. connata fusca, E. corallina, E. lygaea, E. media, E. melanorubra, E. nigricans, E. ochracea...

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Autor principal:	Mola, L.M.
Formato:	Artículo publishedVersion
Publicado:	1996
Materias:	Erythrodiplax holokinetic chromosomes meiosis neo-XY system Odonata polytypisms Anisoptera (dragonflies) Argentina (fish) Corallina Erythrodiplax atroterminata Erythrodiplax connata Erythrodiplax corallina Erythrodiplax melanorubra Erythrodiplax nigricans Erythrodiplax umbrata Libellulidae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00114545_v61_n4_p349_Mola https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00114545_v61_n4_p349_Mola_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_00114545_v61_n4_p349_Mola_oai
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spelling	I28-R145-paper_00114545_v61_n4_p349_Mola_oai2024-08-16 Mola, L.M. 1996 Erythrodiplax is an American genus of dragonflies with a mainly neotropical distribution and with 19 species cited in Argentine. In this work 9 species have been chromosomically analyzed: E. atroterminata, E. connata fusca, E. corallina, E. lygaea, E. media, E. melanorubra, E. nigricans, E. ochraceae and E. umbrata. All of them, except E. media, have n = 12 + X in males, with a similar karyotype and meiotic behaviour. Bivalents decrease gradually in size, except for the small m bivalent, whose size varies among the species. The X chromosome in E. corallina, E. lygaea, E. nigricans and E. umbrata is twice as large as in the other 4 species. On the other hand, E. media has n = 10 + neo-XY, m chromosomes, and its karyotype characterizes by the presence of two large bivalents (being the largest the heteromorphic neo-XY). The genus Erythrodiplax presents a great karyotypic constancy, although polytypisms for the m chromosome size have been detected in E. atroterminata, E. connata fusca and E. umbrata, and for the sex chromosome determining system, in E. media. The chromosome rearrangements that probably originated these polytypisms, and their evolutionary importance are discussed. Fil:Mola, L.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00114545_v61_n4_p349_Mola info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar CYTOLOGIA 1996;61(4):349-357 Erythrodiplax holokinetic chromosomes meiosis neo-XY system Odonata polytypisms Anisoptera (dragonflies) Argentina (fish) Corallina Erythrodiplax Erythrodiplax atroterminata Erythrodiplax connata Erythrodiplax corallina Erythrodiplax melanorubra Erythrodiplax nigricans Erythrodiplax umbrata Libellulidae Odonata Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00114545_v61_n4_p349_Mola_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic	Erythrodiplax holokinetic chromosomes meiosis neo-XY system Odonata polytypisms Anisoptera (dragonflies) Argentina (fish) Corallina Erythrodiplax Erythrodiplax atroterminata Erythrodiplax connata Erythrodiplax corallina Erythrodiplax melanorubra Erythrodiplax nigricans Erythrodiplax umbrata Libellulidae Odonata
spellingShingle	Erythrodiplax holokinetic chromosomes meiosis neo-XY system Odonata polytypisms Anisoptera (dragonflies) Argentina (fish) Corallina Erythrodiplax Erythrodiplax atroterminata Erythrodiplax connata Erythrodiplax corallina Erythrodiplax melanorubra Erythrodiplax nigricans Erythrodiplax umbrata Libellulidae Odonata Mola, L.M. Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
topic_facet	Erythrodiplax holokinetic chromosomes meiosis neo-XY system Odonata polytypisms Anisoptera (dragonflies) Argentina (fish) Corallina Erythrodiplax Erythrodiplax atroterminata Erythrodiplax connata Erythrodiplax corallina Erythrodiplax melanorubra Erythrodiplax nigricans Erythrodiplax umbrata Libellulidae Odonata
description	Erythrodiplax is an American genus of dragonflies with a mainly neotropical distribution and with 19 species cited in Argentine. In this work 9 species have been chromosomically analyzed: E. atroterminata, E. connata fusca, E. corallina, E. lygaea, E. media, E. melanorubra, E. nigricans, E. ochraceae and E. umbrata. All of them, except E. media, have n = 12 + X in males, with a similar karyotype and meiotic behaviour. Bivalents decrease gradually in size, except for the small m bivalent, whose size varies among the species. The X chromosome in E. corallina, E. lygaea, E. nigricans and E. umbrata is twice as large as in the other 4 species. On the other hand, E. media has n = 10 + neo-XY, m chromosomes, and its karyotype characterizes by the presence of two large bivalents (being the largest the heteromorphic neo-XY). The genus Erythrodiplax presents a great karyotypic constancy, although polytypisms for the m chromosome size have been detected in E. atroterminata, E. connata fusca and E. umbrata, and for the sex chromosome determining system, in E. media. The chromosome rearrangements that probably originated these polytypisms, and their evolutionary importance are discussed.
format	Artículo Artículo publishedVersion
author	Mola, L.M.
author_facet	Mola, L.M.
author_sort	Mola, L.M.
title	Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
title_short	Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
title_full	Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
title_fullStr	Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
title_full_unstemmed	Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media
title_sort	meiotic studies in nine species of erythrodiplax (libellulidae, odonata). neo-xy sex chromosome system in e. media
publishDate	1996
url	http://hdl.handle.net/20.500.12110/paper_00114545_v61_n4_p349_Mola https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00114545_v61_n4_p349_Mola_oai
work_keys_str_mv	AT molalm meioticstudiesinninespeciesoferythrodiplaxlibellulidaeodonataneoxysexchromosomesysteminemedia
_version_	1809357052701573120

Meiotic studies in nine species of Erythrodiplax (Libellulidae, Odonata). Neo-XY sex chromosome system in E. media

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