光照强度对温光敏细胞核雄性不育小麦育性的影响
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重庆市科技攻关项目(CSTS2009AB1104); 西南大学博士基金项目(99945-932001)


Effect of Light Intensity on Fertility Alternation of Thermo-Photo-Sensitive Genic Male Sterile Wheat
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    摘要:

    以具有低温不育、高温可育特性的温光敏细胞核雄性不育小麦C412S和C404S为材料,以其回交转育亲本、育性正常的C412和C404为对照,用人工气候箱研究了光照强度对温光敏细胞核雄性不育小麦育性表达的影响。结果表明,在低温条件下(日温8℃/夜温6℃),C412S和C404S在不同光照强度(160 μmol /m2 ·s和300 μmol /m2 ·s)下自交结实率都为0%,表现为完全不育。在较高温度条件下(日温18℃/夜温14℃) ,从花粉母细胞形成期到开花期的光照处理,C412S在160 μmol /m2· s弱光照下的自交结实率仅为5.4%,表现为高不育,在300 μmol /m2· s较强光照下的自交结实率高达65.0%,表现为高度可育;而另一不育系C404S在两种光照强度下的自交结实率分别为69.9%和73.2%,都达到了高度可育水平。表明光照强度对温光敏细胞核雄性不育小麦的雄性育性表达具有重要影响,但不同材料对光照强度的响应程度有所差异。

    Abstract:

    Light-intensity-affected fertility of thermo-photo-sensitive genic male sterile (TGMS) wheat (Triticum aestivum L.) lines C412S and C404S, which were reported to be sterility under lower temperature condition and normal fertility under higher temperature condition, was investigated in growth chambers, with normally fertile wheat lines C412 and C404, the recurrent parents of C412S and C404S, as control. The plants were treated during the developmental period from pollen mother cells (PMCs) formation stage to the anthesis stage in growth chambers at two temperature levels ( 8℃ day temperature, 6℃ night temperature, and 18℃ day temperature, 14℃ night temperature) and two light intensity levels ( 160 and 300 μmol /m2·s) with photoperiod 12 hours day time and 12 hours night time. The results showed that under lower temperature condition (8 ℃ day temperature and 6℃ night temperature), both C412S and C404S showed complete sterility with self-fertilized seed setting rate of 0 % whether at higher light intensity level (300 μmol /m2 ·s) or at lower light intensity level (160 μmol /m2 ·s) . Meanwhile, under higher temperature condition (18℃ day temperature and 14℃ night temperature), C412S showed highly sterility with self-fertilized seed setting rate of 5.4 % after being treated with lower light intensity of 160 μmol /m2·s, but showed normal fertility with self-fertilized seed setting rate of 65.0 % after being treated with higher light intensity of 300 μmol /m2·s; and on the other hand, C404S showed normal fertility whether under higher light intensity (300 μmol /m2 ·s) or under lower light intensity (160 μmol /m2 ·s), with self-fertilized seed setting rate of 69.9 % and 73.2 % after being treated with light intensity of 160 and 300 μmol /m2·s, respectively. These results suggested that light intensity had important effect on fertility alternation of TGMS wheat.

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张建奎,董 静,余国东,等.光照强度对温光敏细胞核雄性不育小麦育性的影响[J].植物遗传资源学报,2011,12(2):301-306.

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