The performance of promising strains of rice, generated through the genetic improvement program of the Instituto Agronômico (IAC), was evaluated for different environments. The experiments were set up in a randomized-block design with four replications, using experimental plots of 6m², during the periods 2006/2007, 2007/2008, 2008/2009 and 2009/2010, in the municipalities of de Capão Bonito and Mococa, both in São Paulo. The total variation of the data for grain-production was analyzed using ANAVA and ANADEV, and the significance of the effects of the interaction between genotype and environment were estimated for the two methodologies. The adaptability and stability of 16 genotypes of upland rice in eight environments were evaluated using the methods of Eberhart and Russell (1966), Lin and Binns (1988), and mixed-model (REML / BLUP). Using the harmonic mean of the relative performance of genotypic values (MHPRVG), the strains, IAC 2009, IAC 1829 and IAC 2005 were selected, with yields superior to 11; 10 and 6% respectively when compared to the general average, which matched results obtained by other methods.
Rice breeding; Genotype environment interaction
