Evolution. Wild plants and domestication (H. Morishima). Differentiation of ecotypes in Oryza sativa L. (N. Takahashi). Morpho-Physiology. Seed germination and seedling growth (N. Takahashi). Adjustment of photosynthetic structures in their steps of rice evolution (S. Tsunoda). Physiological specificity of rice roots in relation to oxidizing power and nutrient uptake (K. Kumazawa). Hormonal control of growth and development (H. Suge). Climatic influence on pollen formation and fertilization (I. Nishiyama). Panicle properties and ripening (T. Sasahara). Genetics. Gene analysis and linkage map (T. Kinoshita). Gene analysis for agronomic traits (Y. Futsuhara, F. Kikuchi). Mutation of grain properties in rice (T. Omura, H. Satoh). Chromosome analysis (N. Kurata, T. Omura). Cytoplasmic male sterility and fertility restoration in rice having genome A (C. Shinjo). Tissue culture and genetic engineering in rice (K. Oono). Synthesis and perspectives (S. Tsunoda). Subject Index.