Genetic progress of the CNA6 populacion after four cycles of recurrent selection.

The objectives of this study were to estimate genetic progress in grain yield (GY) achieved in the CNA6 population of upland rice after four cycles of recurrent selection by the Brazilian Agricultural Research Corporation; and evaluate the genetic potential of this population to generate superior inbred lines after each cycle. This population was synthesized in the 1993/94 crop year by incorporating the alleles from 27 parents into the CNA-IRAT 5/2/1 population.