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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (4): 61-66.doi: 10.11924/j.issn.1000-6850.casb19010060

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Preliminary Study on Phenotypic Variation of Paeonia delavayi Under Homogeneous Environment

Su Zechun, Li Zhaoguang, Xue Runguang(), He Guiqing, Wang Zeqing, He Shoulian   

  1. Alpine Economic Plant Research Institute, Yunnan Academy of Agricultural Sciences, Lijiang Yunnan 674100
  • Received:2019-01-10 Revised:2019-12-25 Online:2020-02-05 Published:2020-02-08
  • Contact: Xue Runguang E-mail:806957397@qq.com

Abstract:

In this study, 13 phenotypic traits of 2-year-old Paeonia delavayi seedlings are used to systematically reveal the degree and regularity of phenotypic variation in different populations. The results showed that: the mean phenotypic differentiation coefficient of the 13 phenotypic traits was 99.57% under the condition of homogeneous environment, the phenotypic differentiation coefficient among populations was 82.76%, the phenotypic differentiation coefficient within populations was 0.32%. The variation among populations was greater than that within populations, indicating that the variation among populations was the main source of phenotypic variation. Previous studies have shown that the mean phenotypic differentiation coefficient of phenotypic traits in natural populations is 98.51%, of which, the phenotypic variation among populations is 48.87% and within populations is 0.59%. Compared with the variation of natural populations, under the condition of homogeneous environment, the phenotypic variation among populations is greater and the phenotypic variation within populations is smaller. The phenomenon indicates that phenotypic traits in populations tend to be more stable through cultivation and domestication, and the difference of phenotypic traits among populations is more obvious. The results can provide data support for establishing the peony core collection.

Key words: Paeonia delavayi, homogeneous environment, phenotypic variation, population group

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