02104naa a2200361 a 450000100080000000500110000800800410001910000210006024501970008126000090027852010830028765000140137065000140138465000100139865000130140865300130142165300100143465300150144465300120145965300130147165300090148470000210149370000220151470000180153670000150155470000190156970000240158870000210161270000170163370000260165070000140167677300520169014851712018-06-07       2001    bl uuuu     u00u1 u    #d1 aPARENTONI, S. N.  aHeterotic groups based on yield-specific combining ability data and phylogenetic relationship determined by RAPD markers for 28 tropical maize open pollinated varieties.h[electronic resource]  c2001  aTwenty eight maize open pollinated varieties (OPVs) were crossed in a diallel scheme and the 378 F1's were evaluated in 10 environments in Brazil. Based on yield-specific combining ability data (SCA), these varieties were classified in four heterotic groups. The consistence of the proposed heterotic groups was confirmed comparing intra-and inter-groups F1 values and midparent heterosis. Superior OPVs combinations for use as a source of inbreds in hybrid breeding programs were determined. RAPD markers were used to genotype these varieties. A UPGMA dendogram, based on marker data from 50 primers and 178 polymorphic bands, was obtained. Phylogeny obtained with RAPD markers agreed with known pedigree data. Dent germplasm tended to group separately from flint germplasm. Multidimensional Scaling Analysis on marker data and morphological data showed a higher degree of genetic divergence among the dent germplasm than among the flint germplasm used in this study. Correlation between RAPD marker estimated genetic distance and SCA for yield was low and positive (r=0,16**).  aheterosis  aFilogenia  aMilho  aZea Mays  aHeterose  aMaize  aMarcadores  aMarkers  aPhylogem  aRAPD1 aMAGALHAES, J. V.1 aPACHECO, C. A. P.1 aSANTOS, M. X.1 aABADIE, T.1 aGAMA, E. E. G.1 aGUIMARAES, P. E. O.1 aMEIRELLES, W. F.1 aLOPES, M. A.1 aVASCONCELOS, M. J. V.1 aPAIVA, E.  tEuphytica, Wageningengv. 121, p.197-208, 2001.