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水稻品种休眠特性的研究

DOI: 10.7685/j.issn.1000-2030.2001.02.001, PP. 1-5

Keywords: 水稻,种子,休眠性,α淀粉酶,脱落酸,赤酶酸

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Abstract:

以13个水稻主栽品种及11个F1代抽穗后35d的种子为材料,进行种子休眠特性的研究。结果显示,30℃下,种子未去颖壳时,南京11、桂朝2号等品种的发芽率均高于80%,无休眠性;IR36的发芽率仅为19%,具有较强的休眠性;越光、N22的发芽率分别为2%和0%,具有极强的休眠性;F2代种子的发芽率均不超过亲本(越光除外)。除去种子颖壳后,大多数供试材料的发芽率均显著提高,休眠性丧失,尤其是F2代种子,但N22仍保持极强的休眠性。淀粉酶活性测定结果表明,酶活性与种子休眠性呈负相关。内源激素的分析表明,在吸水之前,不同休眠性品种的内源ABA和GA3含量无明显差异,但吸水后,休眠性与GA3/ABA的比值呈负相关

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