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光敏核不育水稻开花和育性转变不同的光反应
王伟; 陈亮;   
1.厦门大学生物学系!厦门;2.361005
摘要:
从光敏核不育水稻"农垦585"幼穗分化至二次枝梗期开始,在每天的短日照光期(10h日光)结束、暗期开始时(EOD)进行15d的远红光(FR)照射实验,以比较开花、育性转变过程对短暂的远红光(FR)或红光(R)的反应。EODFR明显抑制水稻植株开花(穗分化),导致"农垦585"和原种"农垦58"的抽穗期均比短日照下推退7d,表现为长日照效应,而"农垦58S"的结实率与原种相比却无显著变化。这暗示诱导农垦58S开花、育性转变过程的光反应可能有差异,前者不仅与光周期有关,且受EODFR的剧烈影响,而育性主要受光周期(临界暗期)控制,基本上不受EODFR的调控。
关键词:  水稻  育性  开花  光周期反应  
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