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草业学报  2010 

不同生育期脆性突变水稻细胞壁组分动态变化研究

, PP. 151-157

Keywords: 脆性突变水稻,不同生育期,细胞壁组分,饲料稻

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Abstract:

试验以伽马射线辐射选育的脆性突变(brittlenessmutation,BM)水稻和亲本中花11(Zhonghua11)为材料,分析分蘖期、抽穗期(约50%抽穗)、成熟期细胞壁纤维组成动态变化特点。结果表明,1)整个生育期BM水稻都具有茎叶易折的特点。2)对照亲本各部位的纤维素含量有先升高后降低的变化趋势,半纤维素含量前期变化不显著,后期显著下降;BM水稻各部位的纤维素含量则表现出逐渐升高的趋势,半纤维素含量尽管有逐渐下降的趋势,但变化不显著。3)与对照亲本相比,BM水稻细胞壁纤维组分变化较大:分蘖期,BM水稻茎、叶、鞘纤维素含量分别极显著下降34.69%,25.89%和28.85%(P<0.01),而半纤维素含量则分别极显著上升15.77%,31.31%和19.32%(P<0.01);抽穗期,BM水稻茎、叶、鞘纤维素含量分别极显著下降32.31%,32.25%和34.69%(P<0.01),而半纤维素含量则分别极显著上升25.39%,32.78%和20.91%(P<0.01);成熟期,两者纤维素差异不显著,但BM水稻茎、叶、鞘半纤维素含量依然极显著高于对照亲本。鉴于以上特征,BM水稻具有作为饲料稻的潜在优势。

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