【摘要】 以生产上应用的10个恢复系和7个不育系为材料,以倒伏指数为主要评价指标,对生产上应用的杂交中籼亲本的抗倒伏特性进行了测定和评价,并分别分析了恢复系和不育系抗倒伏能力的动态变化以及倒伏指数与茎秆性状的关系。结果表明:杂交稻亲本的抗倒伏能力存在差异,恢复系以9019和黄华占的抗倒伏能力最强,不育系则以安农9054S和Ⅱ-32A为好;恢复系基部第1节间倒伏指数与株高呈显著相关,与基部节间长、壁厚和单位节间干重多呈显著或极显著相关;壁厚、单位节间干重与倒伏指数多呈显著或极显著负相关;不育系基部第1节间倒伏指数节间长和壁厚相关系数较大,多呈显著相关。通过研究笔者认为,改良恢复系要适当控制株高,缩短基部节间长度、增加茎秆的充实度;而不育系改良的重点在缩短基部第1节间长度和增加茎秆的充实度。更多还原

【Abstract】 10 restorer lines and 7 male-sterile lines were studied on lodging resistance to rice and the relationship between lodging index and culm traits with lodging index. The results indicated that:Difference among lines and lodging resistance was found. 9019 and huanghuazhan were better than others in restorer lines and Annong9054S, Ⅱ-32A in male-sterile lines. In restorer lines, lodging index of the first internode correlated with plant height and basal length greatly, but negatively correlated with basal internodes’ thickness and dry matter of stem. And in male-sterile lines, the first internode lodging index also correlated with length and thickness of basal internode. Therefore, rice lodging resistance could be improved by controlling plant height properly, shorting basal internodes’ length, strengthening the hardness of the basal stalk and enhancing dry matter of stem.更多还原