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杂交粳稻及其亲本抗倒伏性的相关分析

DOI: 10.7668/hbnxb.2010.02.036, PP. 178-181

Keywords: 水稻,杂交粳稻,抗倒伏,倒伏指数

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Abstract:

对11个杂交粳稻组合与其相应的12个亲本在形态、物质生产和材料力学特性方面的性状指标与倒伏指数进行相关分析。结果表明:在杂交粳稻中,与倒伏指数达到显著正相关的形态性状指标为株高和倒二节长,而倒三叶基角和其张开角则与倒伏指数呈显著负相关。材料力学指标茎基弯折与倒伏指数达到极显著负相关。在亲本品种中,与倒伏指数相关性达到显著水平的形态指标是重心高度和倒二节长,茎基弯折与倒伏指数同样为显著负相关。因此,在杂交粳稻的抗倒伏选育过程中,应适当降低株高,选择较短的倒二节长,同时也应适当的增大对倒三叶基角和张开角的选择;而在亲本品种(常规稻)中,在缩短倒二节长的前提下,适当的降低重心高度,对选育具有抗倒伏特性水稻品种具有重要意义。

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