01683naa a2200229 a 450000100080000000500110000800800410001902400570006010000240011724500970014126000090023852009740024765000190122165000130124065300230125365300210127670000220129770000210131970000220134070000200136277300710138210412882023-03-10       2005    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1590/S1415-475720050005000202DOI1 aADAMOWSKI, E. de V.  aChromossome numbers and meiotic behavior of some Paspalum accessions.h[electronic resource]  c2005  aChromosome 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.  aForage grasses  aPaspalum  aChromosome numbers  aMeiotic behavior1 aPAGLIARINI, M. S.1 aBONATO, A. B. M.1 aBATISTA, L. A. R.1 aVALLS, J. F. M.  tGenetic and Molecular Biologygv. 28, n. 4, p. 773-780, dec. 2005.