A high rate of emergence of seedling was got with the young panicles which were in forth young panicles stage, i.e. in the stage of stamen and pistill formation, and many stronger seedlings and fewer albina seedlings occured.

• 以幼穗分化四期(即雌雄蕊形成期)培养出苗率最高,且出苗健壮,白化苗少,故利用幼穗进行组织培养是改良水稻品种的一条较好的途径。