Chromosome number in germplasm accessions of Paspalum (Plicatula group) from different regions in Brazil |
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Authors: | SY Takayama PM Freitas MS Pagliarini LAR Batista |
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Institution: | 1. Universidade Estadual de Maringá, 87020-900, Maringá-Paraná, Brazil 2. Centro de Pesquisa de Pecuária do Sudeste/EMBRAPA, 13560-970, S?o Carlos-S?o Paulo, Brazil
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Abstract: | We determined the chromosome number of 52 accessions of Paspalum from the germplasm collection of the Centro de Pesquisa de
Pecuária do Sudeste (CPPSE/EMBRAPA) originating from different regions in Brazil. All accessions belonged to the Plicatula
group, 13 of them being P. plicatulum, three P. guenoarum, two P. yaguaronense, two P. compressifolium, one P. atratum, and
31 still unidentified Paspalum sp. Except for a P. yaguaronense accession that presented 2n=60, all the remaining ones presented
2n=40 chromosomes. This is the first report of the chromosome number of P. atratum. Considering that the basic number for
most species in the genus Paspalum is ×=10, the accessions analyzed are tetraploids (2n=4×=40) and hexaploids (2n=6×=60).
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Paspalum Brazilian accessions chromosome number polyploidy |
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