摘要： 对996份中国高粱品种资源的光周期敏感性鉴定表明，中国高粱在每日10h短日照处理条件下，所有鉴定材料都比在自然光照下提前抽穗开花，而且品种间差异很大（5~47d）。按照分级标准，光反应迟钝的材料有35份，占3.5%；中间型的材料有736份，占73.97%；敏感型的材料有225份，占22.6%。统计分析表明，光敏感的程度与鉴定材料的生育期及原产地的地理纬度有一定的相关性。同时，受日照的影响，鉴定材料的株高、叶片数变化与其光敏感性相关。

关键词: 高粱, 光周期, 敏感性

Abstract: The photosensitivity of 996 Chinese sorghum germplasm materials was investigated.The result showed that all the entries under 10 hours lumination per day flowered earlier than those under natural conditions.It was also revealed that photosensitivity of the different materials varied greatly.Of all the entries, 225 materials are highly photosensitive, 736 medium, and 35 photoinsensitive.It suggests that photosensitivity of these materials is associated with the latitude of their original habitat.

Key words: Sorghum, Photoperiod, Photosensitivity