Indirect response to selection in rice genotypes cultivated under wetland or flooded conditions

Abstract

It was to study, by means of indirect response to selection, the possibility of carrying out the preliminary selection of rice (Oryza sativa L.) genotypes with good potential for cultivation under wetland or flooded conditions, in only one of these conditions. Two trials, per location, were conducted in 1985/1986, using 49 rice genotypes. In both locations the experiments were conducted under wetland and flooded conditions. ln the two locations, Leopoldina, MG and Goiânia, GO. The expected genetic gains by direct selection were compared with the expected correlated response to selection for both conditions of cultivation, for the character yield of grains. Among all the situations studied the results permitted to indicate that for grain yield the preliminary selection of rice genotypes to be used on wetland conditions could be done, indirectly, under irrigation conditions using a higher selection intensity in the irrigation trial than could be used in the wetland conditions