冀西北生态环境下结球甘蓝农艺性状与单株产量的相关分析

Correlation Analysis of Agronomic Traits and Yield Per Plant of Cabbage under the Ecological Environment of Northwest Hebei

为了丰富当地品种类型,提高产量,创造更高的经济价值,提高冀西北地区蔬菜产业的整体效益,以35个结球甘蓝品种为试验材料,对单株产量、株高、展开度、外叶长、外叶宽等11个主要农艺性状进行了变异系数、相关系数、通径系数和决定系数分析。结果表明:在相关分析中,结球甘蓝单株产量与叶球横径、株高、外叶长、外叶宽、展开度和外叶重呈极显著正相关,与叶球纵径和中心柱粗呈显著正相关,与外叶数和中心柱高相关性不显著;在通径分析中,各性状对单株产量的直接效应顺序为叶球横径>株高>叶球纵径>外叶数>外叶宽>中心柱高>中心柱粗>外叶长>展开度>外叶重。结球甘蓝的叶球横径是决定单株产量的主要因素,同时株高、展开度、外叶长、外叶宽和外叶重通过影响叶球横径而对单株产量有较大的正效应,选择较大叶球横径是提高产量的重要途径。研究结果可为冀西北生态环境下结球甘蓝高产育种和推广提供重要信息。

In order to enrich the local variety types,increase production,create more economic value and im prove the whole benefit of vegetable industry in Northwest Hebei,35 cabbage hybrids were used as the mate rials,the variation coefficient,correlation coefficient,path coefficient and determination coefficient of 11 agro nomic traits including yield per plant,plant height,expansion,leaf length,leaf width etc.were analyzed.The results of correlation analysis showed that the yield per plant of cabbage had very significantly positive correlation with the transverse diameter of head,plant height,leaf length,leaf width,plant spreading,weight of outside leaves,had significant positive correlation with the longitudinal diameter of head,diameter of cen tral column,and had not significant correlation with the number of outer leaves and the high of central col umn.The path analysis showed that the order of di rect effect of each trait on the yield per plant was transverse diameter of head>plant height>longitudinal diameter of central column>number of outer leaves>leaf width>height of stem in head>diameter of cen tral column>leaf length>leaf width>weight of outside leaves.The transverse diameter of head was the main factor inflencing the yield per plant,mean while the plant height,plant spreading,leaf length,leaf width and weight of outside leaves had positive effect on the yield per plant through influencing the transverse diameter of head,so selecting larger transverse diameter of head was the key factor for improving yield.These results have contributed to the breeding and popularization of cabbage in Northwest Hebei.