玉米茎秆性状与倒伏的相关性及其通径分析  

Correlation and path analysis of lodging resistance with maize stem characters

作　　者：杨青华[1] 冉午玲 李蕾蕾[1] 陈建辉[1] 郑会芳[1] 马野[1] 毛俊[1] 郑博元[1] 邵瑞鑫[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002

出　　处：《河南农业大学学报》2016年第2期167-170,共4页Journal of Henan Agricultural University

基　　金：农业部作物需水与调控重点实验室开放课题(CWRR201404);小麦玉米作物学国家重点实验室自主设置课题(SKL2014ZH-11)

摘　　要：以茎倒伏玉米品种滑986为材料,研究了玉米植株茎秆的主要性状与倒伏的关系。结果表明,茎秆倒伏与茎硬皮穿刺力、垂直压碎力呈极显著负相关,而与穗位高、茎秆重心高度呈显著或极显著正相关,但与株高、茎粗、叶面积、叶夹角、茎秆鲜物质量和干物质量等性状相关性不明显;植株性状之间也存在着一定的相关性;通过通径分析,茎秆硬皮穿刺力对倒伏的直接作用最大,而垂直压碎力和穗位高主要通过硬皮穿刺力而间接影响玉米倒伏,茎秆硬皮穿刺力是影响玉米倒伏的关键因素。The stem lodging Hua 986 varieties were chosen as the materials for the study on correlation between stem characters and lodging resistance. The results indicated that the stem puncture strength and vertical crushing strength have a very significant negative relationship with lodging resistance at0. 01 level; the ear height and center of gravity height have a significant or very significant positive correlation with lodging resistance; but the relationship between lodging resistance and plant height,leaf area,leaf angle,stem fresh weight and dry weight is not obvious,and these indexes were correlated with each other. The results of path analysis showed direct effects of stem puncture strength was the greatest. The vertical crushing and ear height were mainly through indirect effects on lodging resistance. Therefore,the stem puncture strength was the most important impact and most relevant direct factor of corn stalk lodging,and the selection of the indicators was the key to improve the corn lodging resistance.

关 键 词：玉米 茎秆性状 倒伏 相关分析 通径分析 

分 类 号：S513[农业科学—作物学]