Data/hora: 05/06/2024 15:26:10

Provedor de dados: | 49
País: | Brazil
Título: | Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae)
Autores: | Risso-Pascotto,Claudiceia; Pagliarini,Maria Suely; Valle,Cacilda Borges do.
Data: | 2009-06-01
Ano: | 2009
Palavras-chave: | Brachiaria dura; Meiosis; Chromosome number; Cytomixis.
Resumo: | The two accessions of B. dura analyzed (DU01 and DU02) are hexaploid (2n = 6x = 54), derived from x = 9. Meiotic abnormalities, such as precocious chromosome migration to the poles, laggards and micronuclei, were recorded in low frequency in both accessions. The few multivalent chromosome association at diakinesis and meiotic stability suggested that hexaploidy probably resulted from chromosome doubling. In DU02, chromosome transfer (cytomixis) among meiocytes, involving part or the entire genome was observed. The implication of these findings for the Brachiaria breeding is discussed.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000200024
Editor: | Instituto Virtual da Biodiversidade | BIOTA - FAPESP
Relação: | 10.1590/S1676-06032009000200024
Formato: | text/html
Fonte: | Biota Neotropica  v.9 n.2 2009
Fonte: | info:eu-repo/semantics/openAccess