Abstract:Genetic analyses were conducted fot fat content of indicajmpnica hybrid rice byusing genetic medels with genotype x environment interaCtions for seed traits. The resultsindicated that the fat content in rice was mainly controlied simultaneously by seed directadditive and matemal additive effects, with the former predominating. Genotype x environmentinteractions expressed mainly as dommancex environment (including direct dondnance xenvironment and maternal dondnance x environment) and cytoplasm x environmentinteractions- Direct and matemal heritabilities were highly significant. The potential valuesof parehtal lines for the improvement of fat content were discussed in respeet to predictedvalues of genetic effects.