黑龙江省常用骨干自交系光反应特性研究

以黑龙江省常用玉米自交系为试验材料，对21个玉米自交系的每日阶段遮光处理研究其光反应特性。结果表明：缩短光照直接影响玉米品种的生育阶段，其中9叶至抽雄期遮光处理与正常光照的叶龄值差异显著，可作为衡量光反应特性的指标性状。缩短光照后使大部分自交系的花期提前，其中1134、龙系85、H172、4F1对光敏感；Mo17、合344、434、706、446光反应迟钝。

Study on Responses to Photoperiod of Commonly Used Backbone Inbred Lines in Heilongjiang Province

The characteristics on responses to photoperiod of commonly used backbone inbred lines were studied according to the result of daily shading treatment with 21 inbred lines in Heilongjiang province. The results showed that reduce the light influences the growth of maize, leaf number is significant different between the treatment and CK during the 9 leaf to tasseling stage, it can be used as the characteristic index to measure the characteristic of responses to photoperiod. Flowering stage of most inbred lines is ahead when reduce the light, which 1134, Longxi 85, H172, 4F1 were sensitive on responses to photoperiod, Mo17, He344, 434, 706, 446 were dullness on responses to photoperiod.