林业科学2016，Vol.52Issue(11)：124-133,10.DOI:10.11707/j.1001-7488.20161115
欧美杨纤维含量构成因素的相关和通径分析
Correlation and Path Analysis of the Components of Fiber Content for Populus × euramericana
摘要
Abstract
Objective]The components and their contribution rate of fiber content of the mini-rotation forestry in poplar were analyzed to lay a solid foundation for its breeding work. [Method]Five clones of Populus × euramericana (‘Guariento’,‘Lingfeng 1’,‘Lingfeng 3’,‘Lingfeng 4 ’and‘Lingfeng 5 ’) were selected from plantation at the age of 3 years,the growth traits,wood property and their correlation were analyzed. The relational model was built based on the single plant fiber content with other traits,and the partial correlation analysis and path analysis were carried out between major factors of the fiber content. In this study,analysis of variance( ANOVA) ,standard deviation analysis and multiple comparison by LSD were applied in all data of each trait,meanwhile the variation coefficient and repeatability were calculated for five clones. Correlation analysis was carried out among every traits,regression analysis was used to analyze and establish the relational model between the single plant fiber content with growth traits and wood property. The partial correlation analysis and path analysis were applied among major factors of fiber content and the contribution rate of major factors was measured. All analysis were based on the software of Excel and SPSS 17. 0.[Result]All growth traits ( including height, diameter and individual volume ) exhibited a relatively wider variation margin and significant differences among the five clones,and they also had a larger genetic proportion in five clones. As for wood property, except for the single plant fiber content,other traits ( including lignin,holocellulose,cellulose,basic density,microfibril angle,fiber average length,fiber average width,fiber length-width ratio and fiber coarseness) had a relatively stable expression. The analysis of growth traits showed significant correlation, however, the growth characters and wood properties had an independent correlation. The relational model indicated that individual volume,cellulose and basic density were significantly correlated with the single plant fiber content. The single plant fiber content was largely affected by individual volume,cellulose and basic density,meanwhile the three factors were interacted with each other,these were consistent with the results obtained from the relational model. The path analysis showed that improving individual volume was the best way to improve single plant fiber content,increasing wood basic density was the second,the effect by improving cellulose was the least. The contribution rate of the three major factors was 72. 61%,13. 55% and 13. 84%, respectively,which is consistent with the results of partial correlation analysis.[Conclusion]All results showed that the main factors of fiber content in Populus × euramericana included individual volume,cellulose and basic density. At the same time,the results indicated that all growth traits ( height,diameter and individual volume ) had much room for improvement,and these traits were independent with wood properties. Therefore the growth traits should be taken into account as selection criteria.关键词
欧美杨/纤维含量/相关性分析/回归分析/通径分析Key words
Populus × euramericana/fiber content/correlation analysis/regression analysis/path analysis分类
农业科技引用本文复制引用
陈存,丁昌俊,苏晓华,黄秦军..欧美杨纤维含量构成因素的相关和通径分析[J].林业科学,2016,52(11):124-133,10.基金项目
阔叶树速生丰产林定向培育技术研究(2015BAD09B02) （2015BAD09B02）
国家林业公益性行业科研专项经费重大项目(201004004)。 （201004004）
