01861naa a2200229 a 450000100080000000500110000800800410001910000240006024501090008426000090019352012220020265000110142465000130143565000140144865000160146265300110147865300120148965300110150165300220151265300120153477300850154614447572024-04-24       1987    bl uuuu     u00u1 u    #d1 aTOLEDO, J. F. F. de  aPredicting the inbreeding and the outcrossing potential of soybean (Glycine max (L.) Merrill) varieties.  c1987  aPredicting the outcome of a breeding program in its initial stages is a challenging but a feasible task facing the breeder. Means and variances of the parental varieties and of their F3 generation are required for making predictions on the potential of a single cross for producing superior inbred lines (first cycle inbred lines). Means and variances of the parents and their F2 generation are required for the predictions of the hybrids we can produce by crossing those first-cycle inbred lines (second cycle hybrids). The early selection of the most promissing material allows the breeders to allocate more efficiently their resources. The theoretical developments made are exemplified with data from soybean (Glycine max (L.) Merrill). The proportion of the first cycle inbred lines and second cycle hybrids maturing and flowering earlier, later, or within given standards were calculated from the F2 and F3 generations obtained from 28 crosses between eight soybean varieties (Perola, Parana, IAS 4, Davis, BR-5, Bragg, BR-1 and Bossier) grown in Londrina, PR, Brazil, in te years of 1980/81 and 1981/82. The selection power of this approach of discriminating between potent and non-potent crosses was discussed.  aBrazil  abreeding  aGenética  aGlycine Max  aBrasil  aGenetic  aParana  aSoja Melhoramento  aSoybean  tRevista Brasileira de Genetica, Ribeirao Pretogv.10, n.3, p.543-558, set. 1987.