The numerical classification and grading standards of daylily (Hemerocallis) flower color

Huliang Cui, Yanan Zhang, Xiaolu Shi, Feifei Gong, Xiong Xiong, Xiuping Kang, Guoming Xing and Sen Li

PLOS ONE, 2019, vol. 14, issue 6, 1-16

Abstract: This study collected 183 Hemerocallis varieties to conduct numerical classification of flower color and provide valuable baseline data and foundational theory for normalization and precision of Hemerocallis. The color CIELab phenotypes were collected via colorimeter (CR-10 Plus), which separately measured three sepal and petal parts (throat, eye and limb). The colors of experimental samples were artificially named by the Royal Horticultural Society Colour Chart (RHSCC). All the data were analyzed using R software. The results showed that the throat was predominantly green-yellow, light yellow and yellow; green-yellow accounted for the largest proportion of sepals (67.76%) and petals (69.40%). The eye was more abundant, and there were significant differences between sepals and petals. The limb was clustered into five color groups (orange, yellow, pink, red and purple); the yellow group had the most varieties for both sepals and petals, containing 57.38% and 55.74%, respectively. Both sepals and petals had significant differences (p

Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0216460

DOI: 10.1371/journal.pone.0216460

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