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Journal of Agriculture ›› 2020, Vol. 10 ›› Issue (11): 65-71.doi: 10.11923/j.issn.2095-4050.cjas20191000227

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Genetic Diversity Analysis of Phenotypic Traits of Cymbidium goeringii

Fu Qiaojuan(), Li Chunnan, Zhang Xiaoying, Zhao Fukang   

  1. Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, Zhejiang, China
  • Received:2019-10-21 Revised:2020-01-13 Online:2020-11-20 Published:2020-11-18

Abstract:

To understand the relationship among Cymbidium goeringii germplasms and improve the utilization efficiency, genetic diversity analysis was conducted based on 50 phenotypic traits of 120 C. goeringii germplasms. The results show that the phenotypic diversity of C. goeringii germplasms was rich and the variation of quantitative characters was high. The coefficient of variation (CV) ranged from 13.5% to 48.8%, and the highest value of CV was detected in peduncle height. The Shannon-Weaver indexes (I) of qualitative traits ranged from 0.13 to 1.69, and the I value of all the color characters were relatively high. Among all germplasms, most accessions have some special traits such as lips with spots but no stripes, leaves with no curing and art, sepals with no spots, or petals with spots. 13 principal components and 6 factors were extracted using principal component analysis (PCA), which could reflect the integral phenotype of C. goeringii germplasms. Based on cluster analysis, all the accessions were classified into four major groups when the Euclidean distance was about 9.2. The first category included 24 C. goeringii germplasms mainly with plain heart, and the second category had larger flowers. This experiment could provide a theoretical basis for the study of the genetic relationship among C. goeringii germplasms and their utilization.

Key words: Cymbidium goeringii, Phenotypic Diversity, Quantitative Trait, Qualitative Trait, Principal Component Analysis, Cluster Analysis

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