水稻抗倒伏特性及其与茎秆性状的相关性研究  

Study on Rice Lodging Resistance Character and Correlation Between the Culm Traits and Lodging Resistance Traits

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

机构地区：[1]安徽农业大学农学院,合肥230036 [2]安徽荃银禾丰种业有限公司,合肥230088

出　　处：《中国农学通报》2007年第12期58-62,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);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22个中籼稻品种(组合)为对象,研究了水稻倒伏的敏感期和敏感节位,及倒伏指数与茎秆性状的相关性。结果表明:水稻的倒伏敏感期是在齐穗后21～28d,敏感节位是基部第一个伸长节间;相关分析和通径分析表明倒伏指数与节间长、基部节间到穗顶的长和基部节间至穗顶的鲜重呈极显著正相关,与基部节间外径、基部抗折力、基部节间壁厚、单位节间干重和秆形指数呈极显著负相关。抗折力对倒伏指数的负向直接作用最大,其次是单位节间干重。说明改善水稻茎秆的质地结构、增加基部节间的充实度是提高水稻的抗倒伏能力的关键。22 rice eultivars was used to study the lodging sensitive period,the sensitive itemode and the correlation between the culm traits and lodging index. The Results indicate that the lodging sensitive period was 25d all so after full heading; the sensitive internode was first elongating internode from basal. The result of correlation and path analysis indicate that Lodging index was positive correlation with the length of internode,the length from the basal internode to top and the weight from the basal intemode to top, and negatively correlation with the internode cross-sectional thickness,the thick of culm,the dry weight of lcm intemode and the breaking-resistant strength. The direct action of the breaking-resistant strength was largest and ,the second was the dry weight per unit internode. The results showed that the breaking-resistant strength of basal culms was a good parameter for quantifying the culms intensity.

关 键 词：水稻 倒伏 茎秆特性 相关分析 通径分析 

分 类 号：S511[农业科学—作物学]