01687naa a2200205 a 450000100080000000500110000800800410001902400410006010000190010124500770012026000090019752010910020665000170129765000100131470000190132470000160134370000200135970000180137977300840139714883722017-10-13       2009    bl uuuu     u00u1 u    #d7 a10.1590/S1415-475720090050000592DOI1 aCOIMBRA, R. R.  aDevelopment of a Brazilian maize core collection.h[electronic resource]  c2009  aThe aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits revealed few modifications with the various sampling strategies used. Therefore, the active collection could be considered as possessing a satisfactory amount of information for most of its accessions. Moreover, the multivariate strategy generated modifications in the variance of the traits, independent of sampling intensity.  aMelhoramento  aMilho1 aMIRANDA, G. V.1 aCRUZ, C, D.1 aSILVA, D. J. H.1 aVILELA, R. A.  tGenetics and Molecular Biology, Ribeirão Pretogv. 32, n. 3, p. 538-545, 2009.