常用杂交中籼亲本抗倒伏特性评价及改良  

Research on Lodging Resistance Assessment and Improvement of Medium Indica Rice Parents

作　　者：王维刚[1] 石英尧[1] 申广勒[1] 黄艳玲[1] 石扬娟[1] 陈多璞[1] 

机构地区：[1]安徽农业大学,合肥230036

出　　处：《中国农学通报》2008年第4期216-220,共5页Chinese Agricultural Science Bulletin

基　　金：安徽省"十一五"科技攻关项目"水旱稻杂交广谱恢复系在抗倒超高产组合上的应用"(06013101B);"水稻新品种(组合)选育及技术创新"(06003010B);安徽省教育厅自然基金"水稻抗倒伏机理研究与评价体系建立"(2006jql116);合肥市科技攻关项目"抗倒伏高产杂交中籼新组合选育与推广"(20071002)

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。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.

关 键 词：中籼亲本 抗倒伏特性 茎秆性状 倒伏指数 

分 类 号：S511[农业科学—作物学]