低温敏核不育系冷水灌溉繁殖技术研究  

Studies of the Cold Water Irrigation Technique for Multiplication of Low Critical temperature TGMS Rice

作　　者：周承恕[1] 刘建宾[1] 吴坤永 李湘农 

机构地区：[1]湖南杂交水稻研究中心,湖南长沙410125 [2]大庸市永定区种子公司

出　　处：《杂交水稻》2000年第S2期41-42,共2页Hybrid Rice

摘　　要：本研究系通过控制灌溉水温代替低气温效应 ,使低温敏核不育系提高自交结实率 ,在华中。Low critical temperature (LCT) TGMS rice due to stable sterility and long sterile period has a wide adaptability for hybrid seed production, on the other hand, because of the LCT, it is difficult to multiply such TGMS lines under natural conditions thus limitting their commercial extension. In this experiment, irrigating technique with low temperature water to solve the multiplication problem was studied. The results indicated that the technique was very effective and the selfed seed setting rate was improved very much. Among the four treatments i.e. day and night irrigation of shallow water (6 cm), day and night irrigation of deep water (just over the growth point), night irrigation day drainage of shallow water, night irrigation day drainage of deep water (all the treatments lasted for 10 days from phase Ⅳ to phase Ⅵ of panicle differentiation and the water temperature was at 19～21℃), the treatment of day and night irrigation of deep water had the best effect and obtained a high seed yield of 1.91 t/hm 2.

关 键 词：低温敏不育系 育性转换起点温度 冷灌 生长点 

分 类 号：S511[农业科学—作物学]