光敏核不育水稻开花和育性转变不同的光反应  

Different photoresponses of flowering and fertility alteration in photoperiod-sensitive genie male-sterile rice

作　　者：王伟[1] 陈亮[1] 

机构地区：[1]厦门大学生物学系,厦门361005

出　　处：《广西植物》1999年第1期70-72,共3页Guihaia

基　　金：国家自然科学基金!39800087

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。Photoresponses of flowering (panicle development) and fertility alteration of photoperiod-sensitive genie male-sterile rice 'Nongken 58S' were compared after brief end-of-day (EOD) far-red light (FR) or red light (R) irradiation. From secondary rachis-branch primordia differentiation on, EOD experiments were Performed following 10 h of natural sunlight for successive 15 d. The heading date of 'Nongken 58S'plants delayed for 7 d (long-day effect) by EOD FR,whereas its fertility had little or no change relative to the original-line rice 'Nongken 58'. These results implied that in' Nongken 585' plants photoperiod response mediating fertility alteration somewhat differed from that required by flowering.

关 键 词：水稻 育性 开花 光周期反应 

分 类 号：S511.01[农业科学—作物学]