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dc.contributor.authorOlkoski, Denisept_BR
dc.contributor.authorSchifino-Wittmann, Maria Teresapt_BR
dc.date.accessioned2014-12-23T02:13:37Zpt_BR
dc.date.issued2011pt_BR
dc.identifier.issn1518-7853pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/108562pt_BR
dc.description.abstractChromosome numbers (somatic and/or gametic) were determined in 50 populations of M. bimucronata (DC.) O. Kuntze collected in the species area of distribution in Rio Grande do Sul, south Brazil. All populations were diploid (2n = 2x = 26, n = 13). Polysomatic (mostly tetraploid) cells were detected in the seedlings root-tip cells in 39 out of the 41 populations examined, ranging from 3.0 to 28.2 % among populations, but were absent in the root-tips of grown plants. Polysomaty was as well absent in pollen-mother cells. In M. bimucronata pollen-mother cells are joined two-by-two before the onset of meiosis, remaining attached during all the meiotic division until the formation of pollen grain polyads, composed of two sets of four pollen grains each, that are dispersed in this way, which, according to previous suggestions would be an adaptation to ensure high seed set after a single pollination event.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofCrop Breeding and Applied Biotechnology. Londrina. Vol. 11, n.1 (mar. 2011), p. 27-35pt_BR
dc.rightsOpen Accessen
dc.subjectIntraspecific variabilityen
dc.subjectMelhoramento genético vegetalpt_BR
dc.subjectPolyadsen
dc.subjectVariação genéticapt_BR
dc.subjectLeguminosa forrageirapt_BR
dc.subjectMaricápt_BR
dc.titleCytogenetics of Mimosa bimucronata (DC.) O. Kuntze (Mimosoideae, Leguminosae) : chromosome number, polysomaty and meiosispt_BR
dc.title.alternativeCitogenética de Mimosa bimucronata (DC.) O. Kuntze (Mimosoideae,Leguminosae): número cromossômico, polissomatia e meiose pt
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000778976pt_BR
dc.type.originNacionalpt_BR


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