01977naa a2200241 a 450000100080000000500110000800800410001910000220006024501240008226000090020652012200021565000350143565300270147065300200149765300300151765300230154770000200157070000180159070000160160870000230162470000170164777300710166417093302022-02-25       2008    bl uuuu     u00u1 u    #d1 aCEDILLO, D. S. O.  aSelection among and within and combined selection in oil palm families derived from Dura x Dura.h[electronic resource]  c2008  aOil palm, in view of the worldwide consumed oil, is a perennial crop of great importance. Nevertheless, the genetic improvement is still incipient. In this study we applied the selection among and within families and the combined selection, based on the phenotypic values and phenotypic performance (Pi statistic), to verify which strategy obtained the highest genetic gains. Five full-sib families were evaluated in randomized blocks, with five replicates and 12 plants per plot, over five years of successive harvests. The total number of bunches and the total fruit yield per year plant-1 were evaluated. Values of 1.00 and 0.25 for the ratio between the environmental variance among plots and the environmental variance among plants within the plot for both traits, respectively, were adequate for the estimation of the genetic parameters. The existence of genetic variability in the population Dura was verified for both evaluated traits. The combined selection, based either on the phenotypic values or on the underlying Pi statistic, resulted in the highest genetic gains. Despite the satisfactory gains since it translates the true yield potential of the evaluated genotypes and their performance stability.  aMelhoramento Genético Vegetal  aElaeis guineensis Jacq  aEstatística Pi  aEstratégias de seleção  aTeste de famílias1 aFERREIRA, F. M.1 aBARROS, W. S.1 aCRUZ, C. D.1 aDIAS, L. A. dos S.1 aROCHA, R. B.  tCiência Rural, Santa Mariagv. 38, n. 1, p. 65-71, jan-fev. 2008.