02045naa a2200313 a 450000100080000000500110000800800410001902200140006002400410007410000290011524500750014426000090021952010210022865000370124965000260128665000100131265000350132265000170135765000250137465300530139965300380145265300300149065300270152065300240154770000190157170000210159070000270161177300930163820840682018-01-03       2017    bl uuuu     u00u1 u    #d  a1678-39217 a10.1590/S0100-204X20170011000092DOI1 aMORAIS JÚNIOR, O. P. de  aGenetic variability during four cycles of recurrent selection in rice.  c2017  aThe objective of this work was to estimate genetic and phenotypic parameters among progenies of the CNA6 population of upland rice (Oryza sativa) for grain yield and plant height in four cycles of recurrent selection, in order to evaluate the genetic variability and the genotype × location interaction. The experimental data were obtained from yield trials of S0:2 progenies, which were carried out in the experimental design of Federer?s augmented blocks, without replications for progenies within each location. The effect of S0:2 progenies was significant in all cycles for grain yield and in the first three cycles for plant height, indicating the maintenance of the population?s genetic potential to generate transgressive progenies. The participation of the component of the progeny × location interaction in phenotypic variance was of high magnitude. The genetic variability of the CNA6 population of upland rice is maintained for grain yield and plant height during the four cycles of recurrent selection.  aGenotype-environment interaction  aQuantitative genetics  aArroz  aMelhoramento genético vegetal  aOryza Sativa  aSeleção recorrente  aGenética quantitativa componentes de variância  aInteração genótipo × ambiente  aMelhoramento populacional  aPopulation improvement  aVariance components1 aMELO, P. G. S.1 aMORAIS, O. P. de1 aCOLOMBARI FILHO, J. M.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 52, n, 11, p. 1033-1041, nov. 2017.