滇型杂交粳稻滇杂 31是用育性稳定的滇 型不育系榆密 1 5 A和优质抗病恢复系南 34组配育成 ,具有杂种优势强、丰产性好、高抗稻瘟病、米质优、适应性广的特点 ,2 0 0 2年 7月通过云南省农作物品种审定。介绍了该组合的选育过程、特征特性、栽培及制种技术 Dian-type japonica hybrid rice Dianza 31 is fertile stable Yunnan Dian-type sterile line elm 15A and high-quality disease-resistant restorer lines 34 groups were bred, with heterosis, high yield, high resistance to rice blast, rice High quality and wide adaptability. In July 2002, it passed the examination of Yunnan crop varieties. The combination breeding process, characteristics, cultivation and seed production techniques are introduced