对温光型两用核不育系C49S 87和 6个云南典型恢复系剑叶平展—抽穗—开花各发育阶段作了比较研究。结果表明 ,高原生态条件下C49S 87与恢复系在剑叶平展后至开花期间具有不同的阶段发育进度 ,但只要父母本主穗和群体剑叶平展时期基本一致 ,后期不需对花期进行大的调节即可达到花期相遇。因此 ,剑叶平展期可作为制种中后期花期预测的一个主要形态指标 A comparative study was made on the developmental stages of flag leaf-heading-flowering in Wen Guanguang dual-purpose nuclear sterile line C49S 87 and six typical restorer lines in Yunnan. The results showed that C49S 87 and restorer lines had different stages of development after the flattening to the flowering stage under the plateau ecological conditions. However, as long as the main spike of the main and the group of parents had the same flat period, Adjust to achieve flowering meet. Therefore, the flag leaf flat period can be used as a mid-late flowering stage prediction of a major morphological indicators