Competition between meiotic and apomictic pathways during ovule and seed development results in clonality

Autores
Hojsgaard, Diego Hernán; Martínez, Eric Javier; Quarin, Camilo Luis
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Hojsgaard, Diego Hernán. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Hojsgaard, Diego Hernán. Universidad de Gotinga. Departamento de Botánica Sistemática; Alemania.
Fil: Martínez, Eric Javier. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous species, and compete to form a seed as a final goal. This developmental competition was evaluated in tetraploid genotypes of Paspalum malacophyllum in order to understand the low level of sexuality in facultative apomictic populations. Cyto-embryology on ovules, flow cytometry on seeds and progeny tests by DNA fingerprinting were used to measure the relative incidence of each meiotic or apomictic pathway along four different stages of the plant’s life cycle, namely the beginning and end of gametogenesis, seed formation and adult offspring. A high variation in the frequencies of sexual and apomictic pathways occurred at the first two stages. A trend of radical decline in realized sexuality was then observed. Sexual and apomictic seeds were produced, but the efficiency of the sexual pathway dropped drastically, and exclusively clonal offspring remained. Both reproductive pathways are unstable at the beginning of development, and only the apomictic one remains functional. Key factors reducing sexuality are the faster growth and parthenogenetic development in the aposporous pathway, and an (epi)genetically negative background related to the extensive gene de-regulation pattern responsible for apomixis. The effects of inbreeding depression during post-fertilization development may further decrease the frequency of effective sexuality.
Fuente
New Phytologist, 2013, vol. 197, no. 1, p. 336-347.
Materia
AFLP
Apomixis
Cytoembryology
Flow cytometry
Meiosis
Progeny test
Sexual reproduction
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:123456789/37737

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repository_id_str 4871
network_name_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
spelling Competition between meiotic and apomictic pathways during ovule and seed development results in clonalityHojsgaard, Diego HernánMartínez, Eric JavierQuarin, Camilo LuisAFLPApomixisCytoembryologyFlow cytometryMeiosisProgeny testSexual reproductionFil: Hojsgaard, Diego Hernán. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: Hojsgaard, Diego Hernán. Universidad de Gotinga. Departamento de Botánica Sistemática; Alemania.Fil: Martínez, Eric Javier. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous species, and compete to form a seed as a final goal. This developmental competition was evaluated in tetraploid genotypes of Paspalum malacophyllum in order to understand the low level of sexuality in facultative apomictic populations. Cyto-embryology on ovules, flow cytometry on seeds and progeny tests by DNA fingerprinting were used to measure the relative incidence of each meiotic or apomictic pathway along four different stages of the plant’s life cycle, namely the beginning and end of gametogenesis, seed formation and adult offspring. A high variation in the frequencies of sexual and apomictic pathways occurred at the first two stages. A trend of radical decline in realized sexuality was then observed. Sexual and apomictic seeds were produced, but the efficiency of the sexual pathway dropped drastically, and exclusively clonal offspring remained. Both reproductive pathways are unstable at the beginning of development, and only the apomictic one remains functional. Key factors reducing sexuality are the faster growth and parthenogenetic development in the aposporous pathway, and an (epi)genetically negative background related to the extensive gene de-regulation pattern responsible for apomixis. The effects of inbreeding depression during post-fertilization development may further decrease the frequency of effective sexuality.Wiley2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfHojsgaard, Diego Hernán, Martínez, Eric Javier y Quarin, Camilo Luis, 2013. Competition between meiotic and apomictic pathways during ovule and seed development results in clonality. New Phytologist. Londres: Wiley, vol. 197, no. 1, p. 336-347. ISSN-e 1469-8137.http://repositorio.unne.edu.ar/handle/123456789/37737New Phytologist, 2013, vol. 197, no. 1, p. 336-347.reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)instname:Universidad Nacional del Nordesteenghttps://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/j.1469-8137.2012.04381.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/Atribución-NoComercial-SinDerivadas 2.5 Argentina2025-09-29T14:30:56Zoai:repositorio.unne.edu.ar:123456789/37737instacron: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:48712025-09-29 14:30:56.817Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordestefalse
dc.title.none.fl_str_mv Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
title Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
spellingShingle Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
Hojsgaard, Diego Hernán
AFLP
Apomixis
Cytoembryology
Flow cytometry
Meiosis
Progeny test
Sexual reproduction
title_short Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
title_full Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
title_fullStr Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
title_full_unstemmed Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
title_sort Competition between meiotic and apomictic pathways during ovule and seed development results in clonality
dc.creator.none.fl_str_mv Hojsgaard, Diego Hernán
Martínez, Eric Javier
Quarin, Camilo Luis
author Hojsgaard, Diego Hernán
author_facet Hojsgaard, Diego Hernán
Martínez, Eric Javier
Quarin, Camilo Luis
author_role author
author2 Martínez, Eric Javier
Quarin, Camilo Luis
author2_role author
author
dc.subject.none.fl_str_mv AFLP
Apomixis
Cytoembryology
Flow cytometry
Meiosis
Progeny test
Sexual reproduction
topic AFLP
Apomixis
Cytoembryology
Flow cytometry
Meiosis
Progeny test
Sexual reproduction
dc.description.none.fl_txt_mv Fil: Hojsgaard, Diego Hernán. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Hojsgaard, Diego Hernán. Universidad de Gotinga. Departamento de Botánica Sistemática; Alemania.
Fil: Martínez, Eric Javier. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Quarin, Camilo Luis. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous species, and compete to form a seed as a final goal. This developmental competition was evaluated in tetraploid genotypes of Paspalum malacophyllum in order to understand the low level of sexuality in facultative apomictic populations. Cyto-embryology on ovules, flow cytometry on seeds and progeny tests by DNA fingerprinting were used to measure the relative incidence of each meiotic or apomictic pathway along four different stages of the plant’s life cycle, namely the beginning and end of gametogenesis, seed formation and adult offspring. A high variation in the frequencies of sexual and apomictic pathways occurred at the first two stages. A trend of radical decline in realized sexuality was then observed. Sexual and apomictic seeds were produced, but the efficiency of the sexual pathway dropped drastically, and exclusively clonal offspring remained. Both reproductive pathways are unstable at the beginning of development, and only the apomictic one remains functional. Key factors reducing sexuality are the faster growth and parthenogenetic development in the aposporous pathway, and an (epi)genetically negative background related to the extensive gene de-regulation pattern responsible for apomixis. The effects of inbreeding depression during post-fertilization development may further decrease the frequency of effective sexuality.
description Fil: Hojsgaard, Diego Hernán. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
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 Hojsgaard, Diego Hernán, Martínez, Eric Javier y Quarin, Camilo Luis, 2013. Competition between meiotic and apomictic pathways during ovule and seed development results in clonality. New Phytologist. Londres: Wiley, vol. 197, no. 1, p. 336-347. ISSN-e 1469-8137.
http://repositorio.unne.edu.ar/handle/123456789/37737
identifier_str_mv Hojsgaard, Diego Hernán, Martínez, Eric Javier y Quarin, Camilo Luis, 2013. Competition between meiotic and apomictic pathways during ovule and seed development results in clonality. New Phytologist. Londres: Wiley, vol. 197, no. 1, p. 336-347. ISSN-e 1469-8137.
url http://repositorio.unne.edu.ar/handle/123456789/37737
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/j.1469-8137.2012.04381.x
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
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv New Phytologist, 2013, vol. 197, no. 1, p. 336-347.
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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