中国与美国棉花品种的铃质量和衣分差异分析

Difference Analysis of Boll Weight and Lint Index of Cotton between Chinese and American Varieties

以我国及美国多年国家棉花区域试验的对照品种为材料,采用简单相关分析、聚类分析及通径分析等分析方法,从不同角度分析了我国与美国棉花品种铃质量和衣分的差异。结果表明,我国棉花品种皮棉产量高于美国品种,主要归因于较高的铃质量和衣分;通径分析结果表明,铃质量和衣分对皮棉产量有显著的正效应,但对皮棉产量的贡献有所不同;我国棉花品种铃质量和衣分对产量的效应为衣分>铃质量,而美国品种对产量的总效应和直接效应为铃质量>衣分,且对皮棉产量的总效应和直接效应均高于我国;铃质量与衣分的简单相关分析结果显示,我国和美国品种的铃质量与衣分均呈正相关关系,简单线性方程系数分别为0.947和0.540。两国棉花品种的铃质量和衣分对产量的贡献有所差异,且我国品种铃质量与衣分的协同提高程度高于美国品种,遗传改良效果显著。

Based on the results of the national cotton regional test check varieties in China and America, this paper utilized analyzing methods including simple correlation analysis, cluster analysis and path ana- lysis for studying the relationship between boll weight and llnt index of cotton in a multi-perspective way. The results indicated that lint yield was higher in Chinese varieties which maintained the traits of high lint index and big boils. The path analysis showed that boll weight and lint index had a relatively greater posi- tive direct effect on lint yield. The effects on lint yield ranked as lint index 〉 boll weight in Chinese varie- ties but the comprehensive and direct effects ranked as boll weight 〉 lint index in American varieties. The American varieties also kept higher comprehensive and direct effects than Chinese varieties. The simple correlation analysis also indicated that boll weight had a relatively positive correlation with lint index, and the simple correlation coefficient was 0. 947 and 0. 540 in Chinese and American varieties,respectively. Our results indicated that the contribution rates of boll weight and lint index to the yield were different be- tween two countries＇ varieties,and the synergetic raise margin of boll weight and lint index was higher in Chinese varieties.