摘要
用盆栽分期播种和人工气候箱等方法,研究了温度对光敏感核不育水稻(HPGMR)两个光周期反应的影响。两年的研究结果表明,温度对光照诱导HPGMR发育与育性转换均有重要影响。第二光周期反应要求光照长度较严格,是主导因子,但所需温度低于一定临界值,长光照仍不能诱导雄性不育;提高温度,可相对缩短临界光长。在长暗期中给予一定的光时和光强的光间断以诱导雄性不育的反应中,证明光强、光时和温度,三者有互作互补关系。在温度影响光照诱导不育的反应中,光期温度的作用可能大于暗期温度。初步探明,在武汉地区,农垦58S、双8—2S、26001S和25169S的诱导育性转换的近似临界低限温度及其在不同温度下的临界光长存在差异。
Effects of the temperature in response to the two photoperiodic reactions in the HPGMR c. v. shuan 8-2S, Nongken 58S, 26001S, and 25169S were studied with sowing by different seasons in the field and phytotron in 1986—1987. The main results are as follows. (1) The temperature are both important for inducing the development and fertility changes of HPGMR. light—length is the main inducing factor, but temperature affects the photoperiodic reactions in coordination with Light—length. The effects of temperature and Light—length are supplemented with each other. Temperature required by the secondary photoperiodic reaction is higher than. the first one. (2) Various sterile line requirs different critical lower limit temperature and critical light—length for inducing fertility changes. If the temperature was lower than that, the male—sterility could not be induced by long light. The similar average critical lower limit temperatrue (day/ night) and the critical light—length for inducing fertility changes in the high temperature conditions had been verified in Wuhan district. (3) In the secondary photoperiodic reaction of HPGMR, if give a short interruption light to bresk off the long dark period, the male—sterility would be induced under the conditions that not only had something to do with intensity and treatment time of the interruption light, but also demanded a certain temperature simultaneously. (4) The effects of temperature for inducing fertility changes of HPGMR in the light—period (include the times of natural sunlight, supplemental light and interruption light) may be larger than that in the dark period.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1991年第2期127-135,共9页
Journal of Huazhong Agricultural University
基金
国家自然科学基金资助项目
"75"攻关项目及湖北省科委重点项目
关键词
水稻
光敏核不育
光周期
温度
育性
HPGMR
critical light length
critical lower limit temperature
fertiity change
