Registro completo |
Provedor de dados: |
Ciência Rural
|
País: |
Brazil
|
Título: |
Cytogenetic analyses in Paspalum L. reveal new diploid species and accessions
|
Autores: |
Pozzobon,Marisa Toniolo
Machado,Ana Caroline de Carvalho
Vaio,Magdalena
Valls,José Francisco Montenegro
Peñaloza,Andréa del Pilar de Souza
Santos,Sileuza dos
Côrtes,Ana Luiza
Rua,Gabriel Hugo
|
Data: |
2008-08-01
|
Ano: |
2008
|
Palavras-chave: |
Chromosome
Diploid
Polyploid
Ploidy level
Hybrid
Genetic resources
|
Resumo: |
Chromosome numbers were counted in 126 new accessions of 50 Paspalum species from Brazil, Argentina, Paraguay and Bolivia. The chromosome numbers 2n=12, 20, 24, 30, 40, 50, 60, 80 were confirmed. Chromosome numbers for P. arenarium (2n=20), P. barretoi (2n=20), P. aff. ceresia (2n=40), P. corcovadense (2n=20), P. crispulum (2n=20), P. flaccidum (2n=40), P. nummularium (2n=20), P. scalare (2n=20), P. vescum (2n=20) and P. rectum (2n=20) and a diploid cytotype of P. malacophyllum are reported for the first time. The predominance of tetraploid accessions (43.6%) was confirmed, but an unusually high number of diploid species (44%) and accessions (35.7%) was found. These results open new perspectives for breeding programs, phylogenetic studies, and for research on apomixis control, since diploids of Paspalum are typically sexual.
|
Tipo: |
Info:eu-repo/semantics/article
|
Idioma: |
Inglês
|
Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000500014
|
Editor: |
Universidade Federal de Santa Maria
|
Relação: |
10.1590/S0103-84782008000500014
|
Formato: |
text/html
|
Fonte: |
Ciência Rural v.38 n.5 2008
|
Direitos: |
info:eu-repo/semantics/openAccess
|
|