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Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (2): 213-220.doi: 10.7525/j.issn.1673-5102.2021.02.009

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Variation of Flower Phenotypic Traits on 195 Syringa oblata SeedSeedings Single Trees

Rui-Qing HE2, Yun-Yao YANG2, Zeng-Hui HU1,2,3, Jing WU1,2,3(), Ping-Sheng LENG1,2,3   

  1. 1.Beijing Advanced Innovation Center for Tree Breeding by Molecular Design,Beijing University of Agriculture,Beijing 102206
    2.College of Landscape Architecture,Beijing University of Agriculture,Beijing 102206
    3.Beijing Laboratory of Urban and Rural Ecological Environment,Beijing 102206
  • Received:2019-12-19 Online:2021-03-20 Published:2021-01-05
  • Contact: Jing WU E-mail:wjmxy1988@126.com
  • About author:HE Rui-Qing(1994—),female,postgraduate,engaged in landscape plants.
  • Supported by:
    General Project of Science and Technology Plan of Beijing Municipal Education Commission(KM201810020);National Natural Science Foundation of China(31800602);Innovative team building and teacher career development plan projects of Beijing-owned universities(HT20180509);Young Teacher Research Fund Project(SXQN201704)


To accurately grasp the variation degree of floral traits and the phenotypic diversity level of Syringa oblata, so as to provide a theoretical basis for the breeding of S.oblata excellent varieties. The 195 seed seedlings of S.oblata trees around 8 years old were used to analyze the genetic variation, trait correlation and clustering relationship of 5 quantitative traits and four quality traits. Five quantitative traits were extremely significant differences among the 195 trees(P<0.01), and accorded with the normal distribution. The genetic variation coefficients were from 19.72%-30.22%, with an average of 24.97%, and the inflorescence length was the largest. According to the ISCC-NBS method, the group colors were divided into six color groups, namely white, pale pink, purple, purplish red, purplish pink and violet groups. Purple group(54.35%) and purplish red group(32.31%) accounted for the largest proportion; the diversity index of four quality traits ranged from 0.36 to 1.09, with an average of 0.86, of which the corolla lobes(state) were the largest, indicating that the quality traits were abundant within 195 trees. By correlation analysis, there were significant positive correlations between the five quantitative traits, and the correlation coefficient between inflorescence length and inflorescence width was the largest(0.767). By cluster analysis, the 195 samples of S.oblata can be divided into three categories based on euclidean distance. The first type was characterized by corolla tube length; the second group was characterized by long inflorescence; the last type was characterized by corolla lobes. The phenotypic variation of floral traits in the tested genetic resources of S.oblata was richer.

Key words: Syringa oblata, seed seedling trees, floral phenotypic traits, variation analysis

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