【摘要】 湖北光敏核不育水稻 Hubei Photoperiod-sensitive Genic male-sterile Rice(HPGMR)具有短日照可育,长日照不育的特性。本研究探明了农垦58(A—B)等晚粳类型的光敏感核不育水稻的光(日)照诱导育性转变的敏感期是在幼穗分化的第二枝梗及颖花原基分化期至花粉母细胞形成期。据此,提出了光敏感核不育水稻从感光叶龄至花粉完熟期的发育过程中,存在两个光周期敏感期和3个发育阶段的假设。更多还原

【Abstract】 Hubei Photoperiod-sensitive Genic Male-sterile Rice(abbr.to HP-GMR)is a new breeding material of male-sterile rice.It’s fertility canbe changed by light induction.This paper reveals that the stage fromsecondary rachis-branch and spikelet primordia to pollen mother cell for-mation in the process of panicle differetiation is the photoperiod-sensi-tire stage of fertility change induced by light,and there might bethree developing phases and two photoperiod-sensitive stages in the dura-tion from light-sensitive leaf-age to pollen fully maturing stage in HP-GMR:1.Development-inducing phase-containing the first photoperiod-sensitive stage from light-sensitive leaf-age to secondary rachis-branchand spikelet primordia stage,in this phase,plants can be induced byshort-day from the vegetative to reproductive growth;2.Fertility changeinducing phase——containing second photoperiod-sensitive stage fromsecondary rachis-branch and spikelet primordial stage to pollen mothercell formation stage,short-day photoperiod might induce pollens fertileand long-day photoperiod induce its sterile in this phase;3.Fertility-expressing phase——a photoperiod-insensitive phase from pollen mothercell formation to pollen fully maturing stage.Besides,the first andsecond photoperiod-sensitive stages must be kept in a strict sequence.更多还原