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《Journal of Northwest A & F University(Natural Science Edition)》 2017-02
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Morphological diversity of wild Cymbidium goeringii and Cymbidium faberi in the Qinling Mountains

CHEN Junmei;SONG Junyang;HAN Wangya;CHEN Bowen;ZHANG Xian;College of Landscape Architecture and Arts,Northwest A&F University;College of Horticulture,Northwest A&F University;  
【Objective】This study investigated the morphological diversity of wild Cymbidium goeringii and Cymbidium faberi to provide reference for their protection and utilization in the Qinling Mountains.【Method】The morphological diversity of 53 wild C.goeringii samples and 45 wild C.faberi samples from different habitats in the Qinling Mountains was studied.The investigative phenotypic characters contained the main qualitative characters such as leaf color,leaf texture and flower color,and main quantitative characters such as leaf length and width,length and width of middle sepal,length and width of side sepal,and petal length and width.The qualitative characters were evaluated with Shannon-Weiner index and Simpson index.The quantitative characters were evaluated with the maximum,minimum,mean,range,standard(STD)and coefficient of variation.【Result】Analysis of qualitative characters showed that Shannon-Weiner index and Simpson index of C.faberi were generally higher than those of C.goeringii.Analysis of quantitative characters showed that the coefficient of variation ranged from 9.57%to 20.14%inC.goeringii and 10.93%to 29.11%in C.faberi.The variation range of C.faberi was wider than that of C.goeringii.The morphological diversity of C.faberi was higher than that of C.goeringii.There were significantly positive correlations between lengths of flower sheath,side sepal,and petal length,between widths of middle sepal,side sepal,and petal width,between lengths of side sepal and petal,as well as between widths of side sepal and petal in C.goeringii.Significantly positive correlations were also observed between lengths of scape,sepals,and petal length,as well as between lengths of sepals and petal in C.faberi.There were weak negative correlations between lengths of leaf and flower sheath,widths of middle sepal,side sepal,and petal in both orchids.【Conclusion】C.faberi had more abundant variation than C.goeringii,indicating that C.goeringii would face more serious threat in the Qinling Mountains.
【Fund】: 陕西省林业厅建设项目(陕林计字(2011)70);; 西安现代农业科技创新项目(NC1305(2))
【CateGory Index】: S682.31
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