甜糯玉米新品种(组合)主要农艺性状与鲜穗产量的相关及通径分析

Tiannuo Corn Varieties( Combinations) Main Agronomic Characters and Fresh Ear Yield of Correlation and Path Analysis

为筛选出适合新疆北疆滴灌条件下种植的甜糯玉米新品种及选育新品种提供理论依据。对引进的34个鲜食甜糯玉米的10个主要农艺性状与鲜穗产量的关系进行了描述性分析、相关性分析和通径分析。结果表明,参试新品种(组合)10个农艺性状的变异系数分布在4.35%~70.44%,相关分析表明:穗长与鲜穗产量和叶片数与鲜穗产量呈极显著相关(r:0.423 1**、r:0.339 3*);通径分析表明,对鲜穗产量作用最大的性状是穗长(P:0.599 3),其次分别为穗行数(r:0.226 6、P:0.411 1)、穗位(r:0.118 1、P:0.240 7)和叶片数(r=0.339 3、P:0.240 6)。因此,节水灌溉的条件下,影响鲜穗产量的主要性状是穗长和穗行数,其次是穗位和叶片数。

To select suitable for Northern Xinjiang,under the condition of drip irrigation Tiannuo corn varieties and provides the theory basis for breeding new varieties. To the introduction of 34 Tiannuo corn ten major agronomic characters and the relationship between the fresh ear yield has carried on the descriptive analysis,correlation analysis and path analysis. The results showed that the volunteers' new varieties( combinations) of 10 agronomic traits variation coefficient distribution within the scope of 4.35%-70.44%,correlation analysis showed that ear length and fresh ear yield and leaf number and fresh ear yield was significantly correlated( r : 0. 423 1**,r : 0.339 3*); Path analysis showed that the biggest characteristic of fresh ear yield function was ear length( P: 0. 599 3),the second ear rows( r : 0.226 6,P: 0.411 1),ear( r:0.118 1,P = 0. 240 7) and leaf number( r = 0.339 3,P : 0. 240 6),respectively. Water-saving irrigation conditions,therefore,the main characters which influence the production of fresh ear was the spike length and spike number of lines,followed by ear and leaf number.