Croton Codiaeum variegatum (L.) Blume cultivars characterized by leaf phenotypic parameters

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• 作者：Abdus Subhan Mollick^a ; Hisashi Shimoji^a ; Tetsuo Denda^b ; Masatsugu Yokota^b ; Hideo Yamasaki^a ; ^{yamasaki@sci.u-ryukyu.ac.jp}
• 关键词：CV ; coefficients of variation ; LI ; leaf index ; LMW ; leaf middle width ; LUW ; leaf upper quarter width ; LDW ; leaf down quarter width ; LBA ; leaf base angle ; LTA ; leaf tip angle ; PL ; petiole length ; LA ; leaf area ; LP ; leaf perimeter
• 刊名：Scientia Horticulturae
• 出版年：2011
• 出版时间：5 December 2011
• 年：2011
• 卷：132
• 期：Complete
• 页码：71-79
• 全文大小：745 K

文摘

Croton Codiaeum variegatum (L.) Blume is a popular ornamental foliage plant that displays an anomalous range of variations in its leaf size, shape and color pattern. By fixing such leaf variations, more than 300 cultivars have been produced in the world. Until now, however, only a limited number of studies have been made to describe the leaf phenotypic diversity. Here we investigated the diversity of leaf phenotype in croton cultivars with a numerical taxonomic approach. One-way analysis of variance confirmed significant phenotypic variations in the croton cultivars for 12 quantitative leaf parameters. Among the numerical parameter tested, the leaf index that is the ratio of leaf length to leaf width showed the highest variability. High coefficient of variation values were observed in petiole length, leaf area and leaf down quarter width. In contrast with leaf morphology, the composition of leaf pigments that contribute to leaf coloration did not show diversity. Based on the analyses of the leaf parameters, we clustered the croton cultivars into four major groups. The results of this study provide a numerical basis for classification of croton cultivars. A possible involvement of transposon is discussed in terms of somatic mutation that results in the leaf phenotypic diversity.