The breeding process and the analysis of the yield-related traits of the derived lines show that: the breeding of the derived lines is a process of gradual recognization and improvement.

• 通过对水稻籼粳杂交衍生系创新过程和主要产量相关性状的鉴定与分析，认识到水稻籼粳杂交衍生系的创新是一个逐步认识与改良的育种实践。