摘要
对按ｐ×ｑ模式配组的３６个亚种间杂交稻组合，进行了物质生产和分配相关性状的观察和分析。结果表明，亚种间杂交稻物质生产的杂种优势普遍存在，供试３６个亚杂组合中３４个具有超亲优势，总体平均超过亲本４１．３４％，优势在出穗后尤为明显，超亲优势值达４６．９５％；８５％的亚杂组合的物质生产量超过籼型三系杂交稻汕优６３，无一组合显著低于汕优６３，差异主要表现在出穗后，其平均值超过汕优６３达５０．８５％。亚杂种杂交稻组合物质生产能力较强与其普遍超亲的同化面积和优于籼杂的叶片质量有关；抽穗后对茎鞘贮存物质的利用能力较差，但由于其强大的物质生产优势，穗部增重优势明显。
Matter production and its distribution as well as other related characters were observed with 36 combinations crossed from 6 typical Indica and 6 typical Japonica varieties by applying pq model. Results showed that: Heterosis of matter production of these combinations were significantly greater than of Shanyou 63, a varital hybrid rice combination, especially after heading. These were attributed to their leaf area and leaf quality. Despite of their low ability of using matter stored in stem and sheath, the increment of panicle weight was high after heading due to the grest heterosis of matter prodction.
基金
国家"863"计划资助
关键词
亚种间杂交稻
物质生产
杂种优势
水稻
internsubspecific hybrid rice
matter production
heterosis
