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dc.contributor.author
Espinoza, Francisco
dc.contributor.author
Urbani, Mario Hugo
dc.contributor.author
Martínez, Eric Javier
dc.contributor.author
Quarin, Camilo Luis
dc.date.available
2017-12-14T14:26:10Z
dc.date.issued
2001-12
dc.identifier.citation
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
dc.identifier.issn
0049-4763
dc.identifier.uri
http://hdl.handle.net/11336/30568
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Tropical Grassland Soc Aust
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Paspalum Limbatum
dc.subject
Paspalum Lenticulare
dc.subject
Breeding System
dc.subject
Forage
dc.subject.classification
Otras Ciencias Biológicas
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The breeding system of three Paspalum species with outstanding forage potential
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-12-04T17:29:47Z
dc.identifier.eissn
2346-3775
dc.journal.volume
35
dc.journal.number
4
dc.journal.pagination
211-217
dc.journal.pais
Australia
dc.journal.ciudad
St Lucia, Qlnd
dc.description.fil
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
dc.description.fil
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
dc.description.fil
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
dc.description.fil
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
dc.journal.title
Tropical Grasslands
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.tropicalgrasslands.info/index.php/tgft/pages/view/tropicalGrasslands
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