Chinese Journal of Rice Science

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Cluster Analysis of Weedy Rice and Cultivated Rice Based on the Structural Characteristics of Leaf Lower Epidermis

YANG Lin, DAI Wei-min, QIANG Sheng, SONG Xiao-ling*   

  1. Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, China; *Corresponding author, E-mail: sxl@njau.edu.cn
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-09-10 Published:2009-09-10

杂草稻和栽培稻叶片下表皮结构特征的观察及聚类分析

杨 琳,戴伟民,强 胜,宋小玲*   

  1. 南京农业大学 杂草研究室, 江苏 南京210095;*通讯联系人, E-mail: sxl@njau.edu.cn

Abstract: The characteristics of long cells, papillae with different sizes, stomata on leafback in 33 accessions of weedy rice (Oryza sativa f. spontanea) and 6 accessions of cultivated rice (Oryza sativa L.) were observed with a light microscopy (LM). The principal component analysis (PCA) and cluster analysis were conducted using the above data. Three principal components were obtained, in which the number and diameter of the large, medium and small papillae on the long cells, stomatal density contributed most variance. The morphological features of the leaf epidermis varied significantly among the accessions. The results may be valuable for the taxonomic identification and studies on origins of weedy rice.

Key words: weedy rice, leaf lower epidermis, cluster analysis, stomatal density, papillae

摘要: 利用光学显微镜对33份杂草稻及6份栽培稻材料的叶片下表皮中央长细胞及其各级乳突、气孔器及其乳突的结构特征进行了观察、统计后作主成分分析及聚类分析。主成分分析后得到3个在各个性状因子中贡献率最大的主成分,分别是中央长细胞大乳突、中乳突及小乳突的数目、大小,气孔密度。叶表皮结构特征在各供试材料之间有一定的变异和特异性,在杂草稻分类鉴定及亲缘关系的研究中具有一定的价值。

关键词: 杂草稻, 叶下表皮, 聚类分析, 气孔密度, 乳突