Title

水稻光溫敏核不育系矮64S低溫下育性表達規律研究

Translated Titles

Study on the Fertility Expression of Photo-thermo-sensitive Genic Male Sterile Rice Pei'ai 64S at Low Temperature

Authors

廖伏明(Fu-Ming Liao);袁隆平(Long-Ping Yuan)

Key Words

水稻 ; 光溫敏核不育系 ; 培矮64S ; 低溫 ; 育性表達 ; Rice ; Photo-thermo-sensitive genic male strile line ; Pei'ai 64S ; Low temperature ; Fertility expression

PublicationName

中國農業科學

Volume or Term/Year and Month of Publication

33卷1期(2000 / 02 / 01)

Page #

1 - 9

Content Language

簡體中文

Chinese Abstract

藉人工氣候室的人控光溫條件,對兩系雜交水稻不育系培矮64S在22.0~23.0℃的低溫下的育性表達規律進行了連續2年的跟蹤研究結果表明,23.0℃的低溫僅能導致培矮64S花粉不育度的明顯降低,而22.5℃和22.0℃的低溫則不僅能導致花粉不育度的下降,而且還能誘導一定程度的自交結實;培矮64S的育性溫度敏感終止期爲幼穗分化第6期(花粉母細胞減數分裂期),育性溫度最敏感期爲幼穗分化第4~5期(雌雄蕊形成期至花粉母細胞形成期);培矮64S具有光敏性,其臨界光長外於13.50~13.38h之間,光敏溫度範圍爲23~28℃;對於農藝性狀已經穩定的高世代培矮64S而言,其控制充性表達的遺傳基礎尚不純,表現在來源相同的不同株系間或同一株系內不同單株間在低溫下育性表達存在顯著的差異,且低溫強度加大,這種差異就更爲明顯。

English Abstract

The fertility expression of Pei'ai 64S, a principal photo-thermo-sensitive genic male sterile line in two-line hybrid rice, was studied at 22.0~23.0℃ low temperatures for two years in phytotron. The results showed that: a) The low temperature of 23.0℃ (daily mean temperature) could only induce an apparent decrease of pollen sterility, while the low temperatures of 22.5℃ and 22.0℃ could not only decrease remarkably pollen sterility but also induce some extent of selfed fertility; b) The ending stage of thermo-sensitivity in fertility expression of Pei'ai 64S was the PMC meiotic division stage, and the most sensitive stage of temperature on fertility expression was the stamen and pistil formation to PMC formation stage; c) Pei'ai 64S showed photoperiod-sensitivity in fertility expression with its critical photoperiod between 13.50~13.38h and photoperiodsensitive temperature ranging 23~28℃; d) Even though Pei'ai 64S is highly stable in agronomic characters for its very high generation, the genetic basis of its fertility expression has not been fully purified, which was indicated by the significant difference in fertility expression occuring among different lines from the plants of the same previous line and among different plants of the same line, which was greater at lower temperatures.

Topic Category 生物農學 > 農業
生物農學 > 森林
生物農學 > 畜牧
生物農學 > 漁業