Data/hora: 01/06/2024 00:58:53

Provedor de dados: | 65
País: | Brazil
Título: | Meiotic and mitotic behaviour of B chromosomes of ryegrass
Autores: | Techio,Vânia Helena; Mittelmann,Andréa; Marció,Simone; Pereira,Antônio Vander.
Data: | 2010-02-01
Ano: | 2010
Palavras-chave: | Lolium multiflorum; Accessory chromosome; Preferential segregation.
Resumo: | Mitotic and meiotic analyses using conventional and fluorescent stains were employed in plants (accession ETBAZ 055 - origin: Capão do Leão, Rio Grande do Sul State, Brazil) from the Germplasm Active Bank of Ryegrass (Banco Ativo de Germoplasma de Azevém) of Embrapa, for observing the behaviour of B chromosomes. In several meiotic stages, there were observed up to two B chromosomes, which have presented an unstable behaviour regarding their precocious ascension to metaphase I or delays during anaphase I. At the end of the process, the Bs showed predominantly segregation for the nuclei under formation in order to guarantee their propagation. Concerning the cells that comprise the anther tapetum and the root meristems, the B chromosomes have presented a more stable behaviour.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000100014
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782009005000234
Formato: | text/html
Fonte: | Ciência Rural  v.40 n.1 2010
Fonte: | info:eu-repo/semantics/openAccess