The genetic system of the grass genus Paspalum

Autores
Quarin, Camilo Luis
Año de publicación
2012
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Flowering plants consist of approximately 400000 species pertaining to 450 families. Apomixis occurs in 400 species comprising 40 families. The grass genus Paspalum contains 350-400 species, according different taxonomists. The genetic system (chromosome number, meiotic chromosome behavior, and reproductive system) is well known only for about 70 species, from which, 45 are apomictic or have some apomictic biotype. This means that 10% of the apomictic angiosperms belong to the genus Paspalum. Regarding the ploidy level, most species (80%) are polyploid. Most Paspalum polyploids are autopolyploid in origin, and usually multiploid. Either sexual or apomictic allopolyploids are less frequent among polyploid species. A typical multiploid species contains a sexual diploid cytotype together with apomictic polyploid (usually 4x, but also 3x, 5x, 6x, 7x) counterparts assembled in agamic complexes. In these complexes, diploids are sexual outbreeders though they may have genetic capacity for apomictic reproduction, but its expression seems to be strongly repressed. Despite rare exceptions, apomixis in Paspalum is related to autoploidy rather than to interspecific hybridization (alloploidy). Allogamous diploid cytotypes constitute a major reservoir of genetic variability. Gene flow from diploids toward higher ploidy levels is accomplished by recurrent autopolyploidization. In addition, residual sexuality in polyploid cytotypes could create new apomictic polyploid genotypes. Apospory is the common type of apomixis in Paspalum and may coexist with sexuality, even in a single ovule.
Materia
Genetic system
Genus Paspalum
Polyploid
Diploid
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
Institución
Universidad Nacional del Nordeste
OAI Identificador
oai:repositorio.unne.edu.ar:123456789/60480
Acceder
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network_name_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
spelling The genetic system of the grass genus PaspalumQuarin, Camilo LuisGenetic systemGenus PaspalumPolyploidDiploidFil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.Flowering plants consist of approximately 400000 species pertaining to 450 families. Apomixis occurs in 400 species comprising 40 families. The grass genus Paspalum contains 350-400 species, according different taxonomists. The genetic system (chromosome number, meiotic chromosome behavior, and reproductive system) is well known only for about 70 species, from which, 45 are apomictic or have some apomictic biotype. This means that 10% of the apomictic angiosperms belong to the genus Paspalum. Regarding the ploidy level, most species (80%) are polyploid. Most Paspalum polyploids are autopolyploid in origin, and usually multiploid. Either sexual or apomictic allopolyploids are less frequent among polyploid species. A typical multiploid species contains a sexual diploid cytotype together with apomictic polyploid (usually 4x, but also 3x, 5x, 6x, 7x) counterparts assembled in agamic complexes. In these complexes, diploids are sexual outbreeders though they may have genetic capacity for apomictic reproduction, but its expression seems to be strongly repressed. Despite rare exceptions, apomixis in Paspalum is related to autoploidy rather than to interspecific hybridization (alloploidy). Allogamous diploid cytotypes constitute a major reservoir of genetic variability. Gene flow from diploids toward higher ploidy levels is accomplished by recurrent autopolyploidization. In addition, residual sexuality in polyploid cytotypes could create new apomictic polyploid genotypes. Apospory is the common type of apomixis in Paspalum and may coexist with sexuality, even in a single ovule.Asociación Latinoamericano de GenéticaSociedad Argentina de Genética2012-10-28info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfp. 62-62application/pdfQuarin, Camilo Luis, 2012. The genetic system of the grass genus Paspalum. En: XV Congreso Latinoamericano de Genética; XLI Congreso Argentino de Genética; XLV Congreso de la Sociedad de Genética de Chile; II Reunión Regional SAG-Litoral. Rosario: Asociación Latinoamericano de Genética; Sociedad Argentina de Genética, p. 62-62.1852-6233https://repositorio.unne.edu.ar/handle/123456789/60480enghttps://sag.org.ar/jbag/wp-content/uploads/2020/01/V.XXIX_2017_Suppl1_26092017_Web.pdfinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/Atribución-NoComercial-SinDerivadas 2.5 Argentinareponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)instname:Universidad Nacional del Nordeste2026-09-24T12:44:29Zoai:repositorio.unne.edu.ar:123456789/60480instacron:UNNEInstitucionalhttp://repositorio.unne.edu.ar/Universidad públicaNo correspondehttp://repositorio.unne.edu.ar/oaiososa@bib.unne.edu.ar;sergio.alegria@unne.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:48712026-09-24 12:44:30.971Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordestefalse
dc.title.none.fl_str_mv The genetic system of the grass genus Paspalum
title The genetic system of the grass genus Paspalum
spellingShingle The genetic system of the grass genus Paspalum
Quarin, Camilo Luis
Genetic system
Genus Paspalum
Polyploid
Diploid
title_short The genetic system of the grass genus Paspalum
title_full The genetic system of the grass genus Paspalum
title_fullStr The genetic system of the grass genus Paspalum
title_full_unstemmed The genetic system of the grass genus Paspalum
title_sort The genetic system of the grass genus Paspalum
dc.creator.none.fl_str_mv Quarin, Camilo Luis
author Quarin, Camilo Luis
author_facet Quarin, Camilo Luis
author_role author
dc.subject.none.fl_str_mv Genetic system
Genus Paspalum
Polyploid
Diploid
topic Genetic system
Genus Paspalum
Polyploid
Diploid
dc.description.none.fl_txt_mv Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Flowering plants consist of approximately 400000 species pertaining to 450 families. Apomixis occurs in 400 species comprising 40 families. The grass genus Paspalum contains 350-400 species, according different taxonomists. The genetic system (chromosome number, meiotic chromosome behavior, and reproductive system) is well known only for about 70 species, from which, 45 are apomictic or have some apomictic biotype. This means that 10% of the apomictic angiosperms belong to the genus Paspalum. Regarding the ploidy level, most species (80%) are polyploid. Most Paspalum polyploids are autopolyploid in origin, and usually multiploid. Either sexual or apomictic allopolyploids are less frequent among polyploid species. A typical multiploid species contains a sexual diploid cytotype together with apomictic polyploid (usually 4x, but also 3x, 5x, 6x, 7x) counterparts assembled in agamic complexes. In these complexes, diploids are sexual outbreeders though they may have genetic capacity for apomictic reproduction, but its expression seems to be strongly repressed. Despite rare exceptions, apomixis in Paspalum is related to autoploidy rather than to interspecific hybridization (alloploidy). Allogamous diploid cytotypes constitute a major reservoir of genetic variability. Gene flow from diploids toward higher ploidy levels is accomplished by recurrent autopolyploidization. In addition, residual sexuality in polyploid cytotypes could create new apomictic polyploid genotypes. Apospory is the common type of apomixis in Paspalum and may coexist with sexuality, even in a single ovule.
description Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
publishDate 2012
dc.date.none.fl_str_mv 2012-10-28
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv Quarin, Camilo Luis, 2012. The genetic system of the grass genus Paspalum. En: XV Congreso Latinoamericano de Genética; XLI Congreso Argentino de Genética; XLV Congreso de la Sociedad de Genética de Chile; II Reunión Regional SAG-Litoral. Rosario: Asociación Latinoamericano de Genética; Sociedad Argentina de Genética, p. 62-62.
1852-6233
https://repositorio.unne.edu.ar/handle/123456789/60480
identifier_str_mv Quarin, Camilo Luis, 2012. The genetic system of the grass genus Paspalum. En: XV Congreso Latinoamericano de Genética; XLI Congreso Argentino de Genética; XLV Congreso de la Sociedad de Genética de Chile; II Reunión Regional SAG-Litoral. Rosario: Asociación Latinoamericano de Genética; Sociedad Argentina de Genética, p. 62-62.
1852-6233
url https://repositorio.unne.edu.ar/handle/123456789/60480
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://sag.org.ar/jbag/wp-content/uploads/2020/01/V.XXIX_2017_Suppl1_26092017_Web.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
dc.format.none.fl_str_mv application/pdf
p. 62-62
application/pdf
dc.publisher.none.fl_str_mv Asociación Latinoamericano de Genética
Sociedad Argentina de Genética
publisher.none.fl_str_mv Asociación Latinoamericano de Genética
Sociedad Argentina de Genética
dc.source.none.fl_str_mv reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname:Universidad Nacional del Nordeste
reponame_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
collection Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname_str Universidad Nacional del Nordeste
repository.name.fl_str_mv Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordeste
repository.mail.fl_str_mv ososa@bib.unne.edu.ar;sergio.alegria@unne.edu.ar
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score 13.24418

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