Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/492133
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dc.contributor.authorOLIVEIRA, M. N. dept_BR
dc.contributor.authorDAVIDE, L. C.pt_BR
dc.contributor.authorPINTO, C. A. B. P.pt_BR
dc.date.accessioned2017-02-08T23:02:26Z-
dc.date.available2017-02-08T23:02:26Z-
dc.date.created1996-08-15pt_BR
dc.date.issued1995pt_BR
dc.identifier.citationBrazilian Journal of Genetics, v. 18, n. 3, p. 445-450, 1995.pt_BR
dc.identifier.issn0100-8455pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/492133pt_BR
dc.descriptionThe backcrosses of dihaploid Solanum tuberosum with wild species hybrids generating tetraploids progenies require the formation of non-reduced pollen. In this work, the mechanisms responsible for the formation of 2n pollen in 28 dihaploid Solanum tuberosum x Solanum chacoense hybrids were studied. Four mechanisms were found: parallelspindles (ps), fused spindles (fs), premature cytokinesis-1 (pc-1) and premature cytokinesis-2 (pc-2). The ps mechanism was the most frequent, being found in 23 of the 28 assessed clones. The ps and fs mechanisms led to the formation of dyads by first division restitution (FDR), transferring about 80% of the heterozygosity to the progenies. The pc-1 and pc-2 mechanisms also led to the formation of dyads, but they were genetically equivalent to second division restitution (SDR), transferring only 40% of the heterozygosity to the progenies. Occurrence of FDR and SDR were shown to be associated in 12 clones, indicating that the clones can produce non-reduced microspores by more than one mechanism. However, only one mechanism is functional in a single pollen-grain mother-cell. Clones 9-2, 9-3, 9-6 and 15-15 are recommended for use in 4x x 2x matings.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectClone híbridopt_BR
dc.subjectSolanum tuberosum Lpt_BR
dc.subjectHíbridospt_BR
dc.subjectFitomejoramientopt_BR
dc.subjectPatataspt_BR
dc.subjectPlant breendigpt_BR
dc.subjectRetrocruzamientopt_BR
dc.titleMechanisms of 2n potato pollen formation in dihaploid Solanum tuberosum L. x S. chacoense Bitt. hybrid clones.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2019-01-04T11:11:11Zpt_BR
dc.subject.thesagroMelhoramento genético vegetalpt_BR
dc.subject.thesagroBatatapt_BR
dc.subject.thesagroRetrocruzamentopt_BR
dc.subject.thesagroProgenie híbridapt_BR
dc.subject.nalthesaurusPotatoespt_BR
dc.subject.nalthesaurusHybridspt_BR
dc.subject.nalthesaurusBackcrossingpt_BR
dc.subject.nalthesaurusSolanum chacoensept_BR
riaa.ainfo.id492133pt_BR
riaa.ainfo.lastupdate2019-01-04 -02:00:00pt_BR
dc.contributor.institutionMARCELO NASCIMENTO DE OLIVEIRA, CPAC; Lisete Chama Davide, Ufla; César Augusto Brasil Pereira Pinto, Ufla.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CPAF-AC)

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