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dc.contributor.authorBOLDRINI, K. R.
dc.contributor.authorPAGLIARINI, M. S.
dc.contributor.authorVALLE, C. B. do
dc.date.accessioned2018-01-29T23:35:17Z-
dc.date.available2018-01-29T23:35:17Z-
dc.date.created2010-03-19
dc.date.issued2009
dc.identifier.citationGenetics and Molecular Research, v. 8, n.4, p. 1444-1450, 2009.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/661808-
dc.descriptionBrachiaria humidicola (Poaceae), originally from Africa, is an economically important pasture plant in tropical South America. An accession of B. humidicola (H038) collected from the wild African savanna (Mbeya, Tanzania) showed irregular microsporogenesis. This meiotic behavior was consistent with an allopolyploid origin. Multivalent chromosome association at diakinesis gave tri- to octavalents, associated with two nucleoli in some cells. Six non-congregated univalents in metaphase I and anaphase I, along with previous lines of evidence for x = 6 in B. humidicola, confirm H038 as a nonaploid accession, 2n = 9x = 54. Asynchrony in the genome during microsporogenesis also corroborated this assumption. Its putative origin could be a cross between two related species with different rhythms in meiosis. The meiotic behavior of this accession reinforces the hypothesis of the existence of a new basic chromosome number (x = 6) for Brachiaria. The use of this accession in the breeding of this important forage grass for the tropics is discussed.
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectBraquiária
dc.titleMeiotic behavior of a nonaploid accession endorses x = 6 for Brachiaria humidicola (Poaceae).
dc.typeArtigo de periódico
dc.date.updated2018-01-29T23:35:17Zpt_BR
dc.subject.thesagroBrachiaria Humidicolapt_BR
dc.subject.thesagroGramínea Forrageirapt_BR
dc.subject.thesagroMelhoramento Genético Vegetalpt_BR
dc.subject.thesagroPastagempt_BR
riaa.ainfo.id661808
riaa.ainfo.lastupdate2018-01-29
dc.identifier.doi10.4238/vol8-4gmr679
dc.contributor.institutionK. R. BOLDRINI, UEM; M. S. PAGLIARINI, UEM; CACILDA BORGES DO VALLE, CNPGC.
Aparece en las colecciones:Artigo em periódico indexado (CNPGC)

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