铁皮石斛主要农艺性状与多糖含量相关性多重分析

Correlation Analysis of Major Agronomic Characters and the Polysaccharide Contents in Dendrobium officinale

目的:研究铁皮石斛多糖含量与农艺性状之间的相互关系,为提高铁皮石斛种质资源创新利用和铁皮石斛新品种选育提供依据。方法:对30份铁皮石斛种质资源总计110个单株的植株多糖含量和各农艺性状指标进行调查和测定,在此基础上进行相关分析和通径分析。结果:相关性分析表明,铁皮石斛平均节间距与多糖含量的负相关性达显著水平,相关系数为-0.695,叶厚与多糖含量呈正相关,但相关性不显著。通径分析中,茎长的影响最大,为正效应,直接通径系数为1.568。结论:在铁皮石斛资源筛选与新品种选育时,通过考察这些农艺性状指标即可兼顾其多糖含量指标,可为铁皮石斛优良品种的选育实践提供直观而实用的技术指导。

Objective ： In order to provide theoretical and technological basis for the germplasm innovation and variety breeding in Dendrobium officinale, a study of the correlation between polysaccharide content and agronomic characters was conducted. Methods： Based on the polysaceharide content determination and the agronomic characters investigation of 30 copies （110 individual plants） of Dendrobium officinale germplasm resources, the correlation between polysaccharide content and agronomic characters was analyzed via path and correlation analysis. Results：Correlation analysis results showed that there was a significant negative correlation between average spacing and polysaecharide content, the correlation coefficient was -0. 695. And the blade thickness was positively correlated with the polysaccharide content,but the correlation was not significant. The path analysis results showed that the stem length was the maximum influence factor to the polysaceharide,and it was positive effect, the direct path coefficient was 1. 568. Conclusion： According to thess results, the polysaecharide content can be easily and intuitively estimated by the agronomic characters investigating data in the germpalsm resources screening and variety breeding. Therefore, it is a visual and practical teehnolo~ guidance in quality variety breed- ing of Dendrobium officinale.