Rice cultivar Luxiang 90A has morphological characteristics with transforming plant shape,with larger leaf included angle in its early growth stage and smaller leaf included angle in late growth stage.A study on heredity of transforming leaf morphology of Luxiang 90A is carried out by conventional crosses between Luxiang 90A and two rice restorer lines Shuhui 527 and Luxianghui No.1 which have normal leaf morphology.F1 population and F2 population are identified,investigated and analyzed statistically.Results show that all F1 progenies have morphological characteristics with transforming plant shape,while segregation isobserved in F2 population.F2 progenies segregate to fit 3:1 ratio(transforming shape/normal shape).The result suggests that the morphological characteristics with transforming plant shape of rice cultivar Luxiang 90A is controlled by a single dominant gene.