黑龙江省主要玉米品种及其亲本光温反应特性研究I12个玉米品种及其亲本的光反应特性

以黑龙江省12个常用玉米品种及其亲本为试验材料，研究其光反应特性．通过对材料的每日阶段遮光处理的结果分析，缩短光照直接影响玉米品种的生育阶段。其中出苗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玉米杂交种及自交系的花期提前，其中四早六、龙单21、绥玉7号、1134、龙系85、H172、4F1对光敏感；海玉4号、四单16、本育9号、合344、434、706、446光反应迟钝。遮光处理对品种形态性状株高、穗位高、叶片数及雄穗分枝数都有不同程度的影响。其影响大小程度依次为：穗位高〉株高〉雄穗分支〉叶片数。

Study on Responses to Photoperiod and Temperature of Maize Varieties and Their Parents in Heilongjiang Province I Responses to Photoperiod of 12 Maize Varieties and Their Parents

12 maize varieties and their parents used in Heilongjiang province were studied to know their characteristics on responses to photoperiod. The results showed that：reduce the light affected the growth of the＇ maize directly. Leaf number was significant different between the treatment and CK during the emergence to tasseling stage,it could be used as the index to judge the responses to photoperiod of the maize. The flowering stage was advance of most varieties and inbred lines when reduced the light,which Sizao No. 6,Longdan 21 ,Suiyu No. 7,1134,Longxi 85,H172,4F1 were sensitive on responses to photoperiod;Haiyu No. 4, Sidan16, Benyu No, 9, He 344,434,706,446 were dullness. Shading affected the plant height, ear height,the number of leaf and tassel branch. Effect degree was ear height〉plant height〉tassel branch〉the number of leaf.