| 摘要: |
| 【目的】探究牡丹品种分类的等级和标准，进而为其品种选育和资源研究提供参考。【方法】2013-03-05，观测了39个牡丹品种的26个质量和数量性状，首先对26个性状指标进行了R型聚类分析和主成分分析，然后根据R型聚类结果，去掉相关性大的指标，再对39个牡丹品种进行了Q型聚类分析。【结果】R型聚类结果显示，花瓣基部有无色斑与色斑颜色（r=0.766），复叶长与复叶宽（r=0.659）的相关性较大，因此Q型聚类中不考虑色斑颜色和复叶宽2个性状。主成分分析结果表明：结实率、花瓣基部色斑情况、花期、花冠情况等12个性状的贡献率较大。Q型聚类结果显示，39个牡丹品种依据结实率、花瓣基部有无色斑和花期被分为3类：结实率高且花期较早的类群，如“赵粉”、“肉芙蓉”、“迎日红”、“粉中冠”等；结实率低且花瓣基部没有色斑的类群，如“状元红”、“绿香球”、“大胡红”、“珊瑚台”等；结实率低且花瓣基部有色斑的类群，如“红宝石”、“卷叶红”、“十八号”、“菱花湛露”等。【结论】筛选出对牡丹品种分类贡献较大的13个性状，得到可以作为其形态学分类依据的性状有结实率、花瓣基部有无色斑和花期。 |
| 关键词: 牡丹品种 形态学分类 R型聚类 主成分分析 Q型聚类 |
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| 基金项目:国家林业局公益性行业科研专项（201404701）；西北农林科技大学博士科研启动资金项目（2013BSJJ051） |
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| Morphological traits based taxonomy of 39 tree peony cultivars |
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HAN Xue-yuan,ZHANG Yan-long,NIU Li-xin
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| Abstract: |
| 【Objective】This paper aimed to explore classification grades and standards for tree peony cultivars,so as to provide references for breeding and resource studies of tree peony cultivars.【Method】From March to May in 2013,we investigated 26 qualitative and quantitative characters of 39 tree peony cultivars.At first,26 characters data were conducted with R-type cluster and principal component analysis.Then,according to the results of R-type cluster,the characters with high correlation with others were deleted.Finally,39 tree peony cultivars were classified with Q type cluster.【Result】There were high correlation coefficients between existence and color of petal basal blotch (r=0.766),as well as length and width of compound leaf (r=0.659).Thus,the color of petal basal blotch and width of compound leaf were not considered in Q-type cluster analysis.Principal component analysis for the various characters was also carried out.12 out of the 26 traits,including setting ratio,petal basal blotch,flowering phase,and corolla state,etc.,were chosen according to their contributions.Based on setting ratio,petal basal blotch and flowering phase,Q-type cluster analysis classified the 39 cultivars into three clusters.The group of higher setting ratio and earlier flowering phase included “Zhaofen”,“Roufurong”,and “Yingrihong”,etc.The group of lower setting ratio and no petal basal blotch included “Zhuangyuanhong”,“Lüxiangqiu”, and “Dahuhong”,etc.The group of lower setting ratio and petal basal blotch included “Hongbaoshi”,“Juanyehong”,and “Shibahao”,etc..【Conclusion】Main characters for tree peony-cultivars classification were screened and morphological traits for classification including setting ratio,petal basal blotch state and flowering phase were obtained. |
| Key words: tree peony cultivars morphological taxonomy R-type cluster analysis principal component analysis Q type cluster analysis |
