Abstract
More than 800 strains were collected from two sources, the one was 59 agricultural experiment stations in Japan proper or abroad, the other 200 villages or towns in Fukuoka prefecture. They were sown in Wagner's pot in the one hand, or transplanted in specially designed lowland field in the other at the Institute of Agronomy, the Kyushu University. Degree of variations of such characters as ear colour, awn development, grain size, leaf hair, anthocyan devlopment in leaf sheath, number of nodes of the main stem, shooting date, culm height, ear length, number of ears per plant were observed. The author discussed on the geographical differentiation of these characters above mentioned from the genecological view point, compared with those of cultivated rice plant.
