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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (28): 63-71.doi: 10.11924/j.issn.1000-6850.casb20190900669

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Phenotypic Characters of Leaf Color of Main Varieties of Heuchera micrantha

Song Jie1(), Zheng Tianrui2, Lu Lin1, Xie Weijia1, Li Shifeng1, Peng Lvchun1, Cai Yanfei1, Li Shufa1()   

  1. 1Flower Research Institute, Yunnan Academy of Agricultural Sciences/ National Engineering Research Center for Ornamental Horticulture/ Key Lab of Yunnan Flower Breeding, Kunming 650205
    2College of Life Sciences, Sichuan University, Chengdu 610064
  • Received:2019-09-19 Revised:2019-12-30 Online:2020-10-05 Published:2020-09-23
  • Contact: Li Shufa E-mail:77452024@qq.com;593663985@qq.com

Abstract:

In view of the fact that the traditional visual classification method can not scientifically define the leaf color of Heuchera micrantha cultivars, it is necessary to establish a more scientific classification system of H. micrantha cultivars based on leaf color phenotype. In this study, the leaf color of 432 samples of 72 H. micrantha cultivars was determined by color difference instrument. Cluster analysis was carried out on the obtained L, a and b color values. 72 H. micrantha cultivars were divided into five color systems: brown, dark green, yellow, grey green and light green. The correlation analysis of L, a and b values of different color systems of H. micrantha showed that the positive L value of leaves was negatively correlated with a value, so was a value with b value, while the positive L value and b value were positively correlated, but the correlation was not obvious; the reverse L value of leave was negatively correlated with a value, so was a value with b value, and the L value was positively correlated with b value. From the results of multiple comparisons, it could be seen that the chromaticity values of L, a and b of H. micrantha varieties were significantly different between the color-lines, especially the color differences on the frontal side of the leaves between the color-lines. In the future, the color on the frontal side of the leaves should be used as the main reference in breeding H. micrantha varieties.

Key words: Heuchera micrantha, leaf color phenotype, cluster analysis, correlation analysis, multiple comparative analysis, variety breeding

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