The breeding system of three Paspalum species with outstanding forage potential
- Autores
- Espinoza, Francisco; Urbani, Mario Hugo; Martínez, Eric Javier; Quarin, Camilo Luis
- Año de publicación
- 2001
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Knowledge of the breeding system is a fundamental step in any program dealing with genetic improvement of wild grasses for forage purposes. This information is essential for Paspalum, a large genus with a variety of reproductive methods including apomixis. We conducted cytoembryological studies in 3 species of the group Plicatula (Paspalum limbatum, Paspalum lenticulare and Paspalum guenoarum) in order to understand the breeding systems of 9 accessions which are currently under selection and being bred for forage purposes in our institution. Both accessions of P. limbatum were diploid (2n = 2x = 20), showed bivalent chromosome pairing at meiosis and were allogamous due to self-incompatibility. Five accessions of P. lenticulare and 2 of P. guenoarum were tetraploid (2n = 4x = 40) with mainly bivalent and quadrivalent chromosome pairing at meiosis. The high frequency of quadrivalents suggests autoploidy as the most probable origin for these tetraploids. All these tetraploid accessions showed complete degeneration of the megaspores. The embryo sacs, one to several per ovule, always developed from somatic nucellar cells. These nonreduced embryo sacs produced embryos through parthenogenesis, and were hence genetically identical with the mother plant. Notwithstanding, pollination was required for the development of the endosperm. Only one accession of P. lenticulare has some reduced potential for sexual reproduction. Our results indicate that P. limbatum is a sexual allogamous diploid species while P. lenticulare and P. guenoarum reproduce by means of aposporous obligate apomixis.
Fil: Espinoza, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Urbani, Mario Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina - Materia
-
Paspalum limbatum
Paspalum lenticulare
breeding system
Forage - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/30568
Ver los metadatos del registro completo
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The breeding system of three Paspalum species with outstanding forage potentialEspinoza, FranciscoUrbani, Mario HugoMartínez, Eric JavierQuarin, Camilo LuisPaspalum limbatumPaspalum lenticularebreeding systemForagehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Knowledge of the breeding system is a fundamental step in any program dealing with genetic improvement of wild grasses for forage purposes. This information is essential for Paspalum, a large genus with a variety of reproductive methods including apomixis. We conducted cytoembryological studies in 3 species of the group Plicatula (Paspalum limbatum, Paspalum lenticulare and Paspalum guenoarum) in order to understand the breeding systems of 9 accessions which are currently under selection and being bred for forage purposes in our institution. Both accessions of P. limbatum were diploid (2n = 2x = 20), showed bivalent chromosome pairing at meiosis and were allogamous due to self-incompatibility. Five accessions of P. lenticulare and 2 of P. guenoarum were tetraploid (2n = 4x = 40) with mainly bivalent and quadrivalent chromosome pairing at meiosis. The high frequency of quadrivalents suggests autoploidy as the most probable origin for these tetraploids. All these tetraploid accessions showed complete degeneration of the megaspores. The embryo sacs, one to several per ovule, always developed from somatic nucellar cells. These nonreduced embryo sacs produced embryos through parthenogenesis, and were hence genetically identical with the mother plant. Notwithstanding, pollination was required for the development of the endosperm. Only one accession of P. lenticulare has some reduced potential for sexual reproduction. Our results indicate that P. limbatum is a sexual allogamous diploid species while P. lenticulare and P. guenoarum reproduce by means of aposporous obligate apomixis.Fil: Espinoza, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Urbani, Mario Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaTropical Grassland Soc Aust2001-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/30568Espinoza, Francisco; Urbani, Mario Hugo; Martínez, Eric Javier; Quarin, Camilo Luis; The breeding system of three Paspalum species with outstanding forage potential; Tropical Grassland Soc Aust; Tropical Grasslands; 35; 4; 12-2001; 211-2170049-47632346-3775CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.tropicalgrasslands.info/index.php/tgft/pages/view/tropicalGrasslandsinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:23Zoai:ri.conicet.gov.ar:11336/30568instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:51:23.805CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The breeding system of three Paspalum species with outstanding forage potential |
title |
The breeding system of three Paspalum species with outstanding forage potential |
spellingShingle |
The breeding system of three Paspalum species with outstanding forage potential Espinoza, Francisco Paspalum limbatum Paspalum lenticulare breeding system Forage |
title_short |
The breeding system of three Paspalum species with outstanding forage potential |
title_full |
The breeding system of three Paspalum species with outstanding forage potential |
title_fullStr |
The breeding system of three Paspalum species with outstanding forage potential |
title_full_unstemmed |
The breeding system of three Paspalum species with outstanding forage potential |
title_sort |
The breeding system of three Paspalum species with outstanding forage potential |
dc.creator.none.fl_str_mv |
Espinoza, Francisco Urbani, Mario Hugo Martínez, Eric Javier Quarin, Camilo Luis |
author |
Espinoza, Francisco |
author_facet |
Espinoza, Francisco Urbani, Mario Hugo Martínez, Eric Javier Quarin, Camilo Luis |
author_role |
author |
author2 |
Urbani, Mario Hugo Martínez, Eric Javier Quarin, Camilo Luis |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Paspalum limbatum Paspalum lenticulare breeding system Forage |
topic |
Paspalum limbatum Paspalum lenticulare breeding system Forage |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Knowledge of the breeding system is a fundamental step in any program dealing with genetic improvement of wild grasses for forage purposes. This information is essential for Paspalum, a large genus with a variety of reproductive methods including apomixis. We conducted cytoembryological studies in 3 species of the group Plicatula (Paspalum limbatum, Paspalum lenticulare and Paspalum guenoarum) in order to understand the breeding systems of 9 accessions which are currently under selection and being bred for forage purposes in our institution. Both accessions of P. limbatum were diploid (2n = 2x = 20), showed bivalent chromosome pairing at meiosis and were allogamous due to self-incompatibility. Five accessions of P. lenticulare and 2 of P. guenoarum were tetraploid (2n = 4x = 40) with mainly bivalent and quadrivalent chromosome pairing at meiosis. The high frequency of quadrivalents suggests autoploidy as the most probable origin for these tetraploids. All these tetraploid accessions showed complete degeneration of the megaspores. The embryo sacs, one to several per ovule, always developed from somatic nucellar cells. These nonreduced embryo sacs produced embryos through parthenogenesis, and were hence genetically identical with the mother plant. Notwithstanding, pollination was required for the development of the endosperm. Only one accession of P. lenticulare has some reduced potential for sexual reproduction. Our results indicate that P. limbatum is a sexual allogamous diploid species while P. lenticulare and P. guenoarum reproduce by means of aposporous obligate apomixis. Fil: Espinoza, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Urbani, Mario Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Martínez, Eric Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Quarin, Camilo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina |
description |
Knowledge of the breeding system is a fundamental step in any program dealing with genetic improvement of wild grasses for forage purposes. This information is essential for Paspalum, a large genus with a variety of reproductive methods including apomixis. We conducted cytoembryological studies in 3 species of the group Plicatula (Paspalum limbatum, Paspalum lenticulare and Paspalum guenoarum) in order to understand the breeding systems of 9 accessions which are currently under selection and being bred for forage purposes in our institution. Both accessions of P. limbatum were diploid (2n = 2x = 20), showed bivalent chromosome pairing at meiosis and were allogamous due to self-incompatibility. Five accessions of P. lenticulare and 2 of P. guenoarum were tetraploid (2n = 4x = 40) with mainly bivalent and quadrivalent chromosome pairing at meiosis. The high frequency of quadrivalents suggests autoploidy as the most probable origin for these tetraploids. All these tetraploid accessions showed complete degeneration of the megaspores. The embryo sacs, one to several per ovule, always developed from somatic nucellar cells. These nonreduced embryo sacs produced embryos through parthenogenesis, and were hence genetically identical with the mother plant. Notwithstanding, pollination was required for the development of the endosperm. Only one accession of P. lenticulare has some reduced potential for sexual reproduction. Our results indicate that P. limbatum is a sexual allogamous diploid species while P. lenticulare and P. guenoarum reproduce by means of aposporous obligate apomixis. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-12 |
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/11336/30568 Espinoza, Francisco; Urbani, Mario Hugo; Martínez, Eric Javier; Quarin, Camilo Luis; The breeding system of three Paspalum species with outstanding forage potential; Tropical Grassland Soc Aust; Tropical Grasslands; 35; 4; 12-2001; 211-217 0049-4763 2346-3775 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/30568 |
identifier_str_mv |
Espinoza, Francisco; Urbani, Mario Hugo; Martínez, Eric Javier; Quarin, Camilo Luis; The breeding system of three Paspalum species with outstanding forage potential; Tropical Grassland Soc Aust; Tropical Grasslands; 35; 4; 12-2001; 211-217 0049-4763 2346-3775 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.tropicalgrasslands.info/index.php/tgft/pages/view/tropicalGrasslands |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Tropical Grassland Soc Aust |
publisher.none.fl_str_mv |
Tropical Grassland Soc Aust |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613580473761792 |
score |
13.070432 |