摘要
【目的】探讨油用牡丹Paeonia suffruticosa主要表型性状和单株产量的变异特征及相关关系,确定牡丹单株产量的构成因素。【方法】以25份牡丹种质资源为材料,对其主要表型性状进行相关性、主成分、多元线性回归和通径分析。【结果】供试材料表型性状的变异系数为11.36%~82.57%,单株产量与单株果实质量、单株果实数、单株有效果实数、出籽率、蓇葖宽、冠幅面积、单株新枝数、单株2年生枝数、单株花朵数和小叶数等性状存在极显著正相关(P<0.01);单株产量与聚合蓇葖果直径、复叶宽、复叶叶长叶柄比等性状存在显著正相关(P<0.05);单株产量与种子含水量、顶小叶长和顶小叶叶形指数存在显著负相关(P<0.05)。主成分分析发现共有5个主成分特征根大于1,累计贡献率69%;多元线性回归和通径分析表明单株产量与单株果实质量、单株果实数、单株有效果实数、出籽率、千粒质量和顶小叶叶形指数等性状显著相关。【结论】对单株产量贡献最大的表型性状依次为单株果实质量、单株有效果实数和出籽率,应在油用牡丹品种选育和种质创新中予以重视。
【Objective】To analyze the variation of main phenotypic traits and yield per plant of oil peony（ Paeonia suffruticosa）,study the correlation between yield per plant and phenotypic traits,and determine the components of yield per plant.【Method】Twenty five peony varieties were selected. Correlation analysis,principal component analysis,multiple regression analysis and path analysis were performed on their main phenotypic traits. 【Result】The variation coefficients of all the investigated phenotypic traits ranged from 11. 36% to 82. 57%. Yield per plant was significantly（ P〈0. 01） positively correlated with10 traits including fruit mass per plant,fruit number per plant,valid fruit number per plant,seed rate,follicle width,crown area,new branch number per plant,two-year-old branch number per plant,flower number per plant and leaflet number. Yield per plant was significantly（ P〈0. 05） positively correlated with three traits including aggregate follicle diameter,compound leaf width and compound leaf length to petiole length ratio. Yield per plant was significantly（ P〈0. 05） negatively correlated with three traits including seed moisture content,top leaflet length and top leaflet shape index. The principal component analysis showed that there were five common factors with eigen values above 1,and the accumulative contribution rate was 69%. The multiple linear regression analysis and path analysis showed that yield perplant was significantly correlated with six traits including fruit mass per plant,fruit number per plant,valid fruit number per plant,seed rate,thousand-seed mass and top leaflet shape index. 【Conclusion】The key traits influencing yield per plant of oil peony in order were fruit mass per plant,valid fruit number per plant and seed rate. The three traits should be paid more attention in oil peony breeding and germplasm innovation.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2017年第2期86-91,共6页
Journal of South China Agricultural University
基金
863计划(2011AA100207)
关键词
油用牡丹
单株产量
表型性状
主成分分析
通径分析
oil peony
yield per plant
phenotypic trait
principal component analysis
path analysis
