Por favor, use este identificador para citar o enlazar este ítem: http://www.alice.cnptia.embrapa.br/alice/handle/doc/321547
Registro completo de metadatos
Campo DCValorLengua/Idioma
dc.contributor.authorVALLE, C. B. do
dc.contributor.authorSAVIDAN, Y. H.
dc.contributor.authorJANK, L.
dc.date.accessioned2024-05-03T19:52:41Z-
dc.date.available2024-05-03T19:52:41Z-
dc.date.created1991-03-22
dc.date.issued1989
dc.identifier.citationIn:INTERNATIONAL GRASSLAND CONGRESS, 16., 1989, Nice, France. Proceedings... Nice: Association Francaise pour la Production Fourragere, 1989.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/321547-
dc.descriptionBrachiaria decumbens Stapf is a perennial tropical forage grass, native to east African savannas. It was introduced to Brazil in the 1960's and is now widely cultivated over 30 million hectares in Central Brazil alone. The two commercial varieties are apomictic tetraploids (2n = 4x = 36), producing uniform progeny, and were selected for their high dry matter production and persistence on poor acid soils. They lack, however, resistance to spittlebugs (Deois spp„ Zulia spp., Aeneolania spp.) and produce forage of low nutritive value, especially during the dry winter months. The absence of natural variability associated to apomictic reproduction has prevented improvement of these varieties through hybridization. The Brachiaria germplasm recently collected by CIAT (International Center for Tropical Agriculture)/ILCA (International Livestock Center in Africa) under the auspices of IBPGR (International Board for Plant Genetic Resources) opens up new possibilities of selection of superior accessions and intra and interspecific breeding within this genus. The germplasm includes about 800 accessions of 24 different species of Brachiaria, collected over six countries in East Africa (Centro lnternational de Agricultura Tropical, 1986). Breeding within this genus has been complicated by differences in ploidy levels between sexual and apomictic species (Ferguson, 1974), and by inherent difficulties in marking interspecific hybrids (Ndikumana,1985). The study of the mode of reproduction of this B. decumbens germplasm was undertaken in hopes of finding sexuality and thus implementing an intraspecific breeding program aimed at producing superior apomictic cultivars to be released in Brazil.eng
dc.language.isoeng
dc.rightsopenAccess
dc.titleApomixis and sexuality in Brachiaria decumbens stapf.
dc.typeResumo em anais e proceedings
dc.subject.thesagroApomixia
dc.subject.thesagroBrachiaria Decumbens
dc.subject.thesagroForragem
dc.subject.thesagroMelhoramento Genético Vegetal
dc.subject.thesagroPastagem
dc.subject.nalthesaurusEmbryology
dc.subject.nalthesaurusForage grasses
dc.subject.nalthesaurusPlant breeding
dc.format.extent2p. 407-408.
riaa.ainfo.id321547
riaa.ainfo.lastupdate2024-05-03
dc.contributor.institutionCACILDA BORGES DO VALLE, CNPGC; YVES HERVÊ SAVIDAN, NSTITUT FRANÇAIS DE RECHERCHE SCIENTIFIQUE POUR LE DÉVELOPPMENT EN COOPÉRATION; LIANA JANK, CNPGC.
Aparece en las colecciones:Resumo em anais de congresso (CNPGC)

Ficheros en este ítem:
Fichero Descripción TamañoFormato 
Apomixis-sexuality-brachiaria-1989.pdf188,72 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro sencillo del ítem

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace