01797naa a2200277 a 450000100080000000500110000800800410001910000200006024501010008026000090018152009680019065000160115865000180117465000140119265000150120665000130122165300250123465300200125965300190127965300320129865300410133065300250137165300170139665300150141377300910142817825592009-10-08       2009    bl uuuu     u00u1 u    #d1 aVIANA, J. M. S.  aSelection of popcorn inbred lines based on performance and genealogy of S5 progenies and plants.  c2009  aThe development of hybrids is the most important objective in a corn breeding program. The objectives of this study were to select and assess inbred lines, and to discuss the efficiency of four cycles of among and within inbred family selection. Two experiments were evaluated, one with 144 S5 progenies of the popcorn population Beija-Flor and another with seven inbred lines. Based on expected gains in expansion volume, the best selective procedure was mass selection. The 14 selected inbred lines should be divergent, because only two pairs were derived from the same S3 or S4 family. The analysis of selection efficiency demonstrated that it is important to select superior plants in families with poorer performance to minimize the loss of superior genotypes. The quality of the evaluated inbred lines was comparable to commercial populations and the yield satisfactory. The information about genealogy did not increase the inbred line selection efficiency.  aAgricultura  aBiotecnologia  aGenética  aMilho Doce  aZea Mays  aFamília endogâmica  aGanho genético  aGano genético  aGenealogia de progênies S5  aLinhagens de milho-pipoca Beija Flor  aMétodo genealógico  aMilho-pipoca  aPlantas S5  tCrop Breeding and Applied Biotechnology, Londrinagv. 9, n. 2, p. 174-180, June, 2009.