Título:	Chromossome numbers and meiotic behavior of some Paspalum accessions.
Autoria:	ADAMOWSKI, E. de V. PAGLIARINI, M. S. BONATO, A. B. M. BATISTA, L. A. R. VALLS, J. F. M.
Afiliação:	ELENIZA DE VICTOR ADAMOWSKI, Universidade Paranaense; MARIA SUELY PAGLIARINI, Universidade Estadual de Maringá; ANDRÉA BEATRIZ MENDES BONATO, Universidade Estadual de Maringá; LUIZ ALBERTO ROCHA BATISTA, CPPSE; JOSE FRANCISCO MONTENEGRO VALLS, Cenargen.
Ano de publicação:	2005
Referência:	Genetic and Molecular Biology, v. 28, n. 4, p. 773-780, dec. 2005.
Conteúdo:	Chromosome number and meiotic behavior were evaluated in 36 Brazilian accessions of the grass Paspalum (which had never previously been analyzed) to determinate which accessions might be useful in interspecific hybridizations. The analysis showed that one accession of Paspalum coryphaeum was diploid (2n = 2x = 20) and one accession of Paspalum conspersum hexaploid (2n = 6x = 60), the remaining 34 accessions being tetraploid (2n = 4x = 40). The pairing configuration was typical for the ploidy level i.e. in the diploid, chromosomes paired as 10 bivalents, in tetraploids as bi-, tri- and quadrivalents, and in hexaploid as 30 bivalents. A low frequency of meiotic abnormalities (less than 10%) was observed in the diploid, hexaploid and some tetraploid accessions, although the majority of tetraploid accessions showed a high frequency of meiotic irregularities. The use of accessions with a low frequency of meiotic abnormalities in breeding programs is discussed.
NAL Thesaurus:	Paspalum Forage grasses
Palavras-chave:	Chromosome numbers Meiotic behavior
Digital Object Identifier:	https://doi.org/10.1590/S1415-47572005000500020
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)