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Location Distribution Characteristics in Leaf Lateral Asymmetry of Hybrid Indica Rice

Jie Li1,2, Yuehua Feng1,3,*, Jinfeng Peng1, Xiaoke Wang1, Dinghua Yang2, Guiling Xu1
1 College of Agronomy, Guizhou University, Guiyang, 550025, China
2 Qiandongnan Vocational and Technical College for Nationalities, Kaili, 556000, China
3 Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang, 550025, China
* Corresponding Author: Yuehua Feng. Email:

Phyton-International Journal of Experimental Botany 2020, 89(3), 657-666.

Received 10 April 2020; Accepted 22 May 2020; Issue published 22 June 2020


Rice leaves show lateral asymmetry. Differences in width, thickness, chlorophyll meter readings, nitrogen content, density, and yield on each asymmetrical have been reported. However, limited information is available on the distribution characteristics of the smooth side (SS) and rough side (RS) of rice leaves. The SS of rice leaves can be divided into two types according to its location in leaf: one is the smooth side appearing on the left (SSAL) of the leaf, while the smooth side of the other type appears on the right (SSAR). Through the investigation of four rice varieties, we identified that the proportion of SSAL or SSAR of flag leaves on main stems or tillers was close to 0.50 in the rice population. On the same tiller stem, SSAL and SSAR present alternately, and the SS always stretches ahead of the RS in the curled state. Among the tiller flag leaves of a single rice plant, the proportion of tiller flag leaves with SSAL or SSAR to the total number of tillers is a discrete random variable. Frequency distribution analysis of these proportions showed that the percent of frequency of some class limits was close to each other, and the ratios of percent of frequency of SSAL to SSAR were close to 1:1. To our knowledge, this is a novel finding in rice canopy morphology. According to this study, we can divide rice population into two groups in four hybrid rice varieties.


Hybrid rice; leaf lateral asymmetry; rough side; smooth side

Cite This Article

Li, J., Feng, Y., Peng, J., Wang, X., Yang, D. et al. (2020). Location Distribution Characteristics in Leaf Lateral Asymmetry of Hybrid Indica Rice. Phyton-International Journal of Experimental Botany, 89(3), 657–666.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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