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dc.contributor.authorFELISMINO, M. F.pt_BR
dc.contributor.authorPAGLIARINI, M. S.pt_BR
dc.contributor.authorVALLE, C. B. dopt_BR
dc.date.accessioned2011-08-02T01:01:28Z-
dc.date.available2011-08-02T01:01:28Z-
dc.date.created2009-04-02pt_BR
dc.date.issued2008pt_BR
dc.identifier.citationCell Biology International, v. 32, p. 1459-1463, Nov. 2008. Issue 11.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/326808pt_BR
dc.descriptionSeveral mutations are known to alter the normal progression of meiosis and can be correlated with defects in microtubule distribution. The dv mutation affects the spindle organization and chromosomes do not converge into focused poles. Two Brachiaria hybrids presented the phenotypic expressions of dv mutation but exhibited many more details in the second division. Bivalents were distantly positioned and spread over a large metaphase plate and failed to converge into focused poles. Depending on the distance of chromosomes at the poles, telophase I nuclei were elongated or the chromosomes were grouped into various micronuclei of different sizes in each cell. The first cytokinesis occurred. However, when there were micronuclei, a second cytokinesis immediately took place dividing the prophase II meiocytes into three or four cells. In each meiocyte, meiosis progressed to the second division. Slightly elongated nuclei or micronuclei were recorded in telophase II. After a third cytokinesis, hexads or octads were formed. Pollen grains of different sizes were generated. One of these hybrids presented a higher frequency of abnormal cells than when previously analyzed. The fate of these hybrids as genitors or as candidates for cultivars in the Brachiaria breeding program is discussed.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectBraquiáriapt_BR
dc.subjectCampo Grandept_BR
dc.subjectMato Grosso do Sulpt_BR
dc.subjectBrasilpt_BR
dc.titleA differential phenotypic expression of a divergent spindle mutation in interspecific Brachiaria hybrids.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2011-08-02T01:01:28Zpt_BR
dc.subject.thesagroBrachiariapt_BR
dc.subject.thesagroCitogenética Vegetalpt_BR
dc.subject.thesagroGramínea Forrageirapt_BR
dc.subject.thesagroHibridopt_BR
dc.subject.thesagroMeiosept_BR
dc.subject.thesagroMelhoramento Genético Vegetalpt_BR
dc.subject.thesagroPastagempt_BR
riaa.ainfo.id326808pt_BR
riaa.ainfo.lastupdate2011-08-01pt_BR
dc.contributor.institutionMariana Ferrari Felismino, UEM; Maria Suely Pagliarini, UEM; Cacilda Borges do Valle, CNPGC.pt_BR
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