Eco-geographic variation of common wild rice - Oryza rufipogon Griff. in Sri Lanka

  • S Sandamal
  • A Tennakoon
  • D Ratnasekera
  • DABN Amarasekera
  • B Marambe
Keywords: Genetic differentiation, Morphological variation, Oryza rufipogon, Population divergence, Wild rice


Wild species of rice (Oryza) have superior agronomic characteristics to be incorporated in rice breeding programs worldwide.  Population studies of wild relatives of rice in Sri Lanka has not being well documented despite a few of attempts. In the present study, phenotypic diversity of Oryza rufipogon populations exist in Sri Lanka were characterized based on nine quantitative morphological traits. Populations (P1, P2, P3, P4 and P5) were established in a common-garden and were characterized. The results revealed moderate phenotypic diversity among O. rufipogon populations studied. However, flag leaf length and awn length were the most variable traits while plant height, flag leaf angle, flag leaf panicle neck length and spikelet angle were the least variable traits. O. rufipogon can be simply distinguished using flag leaf length and width, panicle branching type and distance from panicle base to lowest spikelet insertion. The dendrogram results indicated that four main clusters are at a similarity level of 98.73, showing the diversely related populations with a high identity based on higher similarity values. P1 and P2 populations grouped together by forming the first cluster. The second, third and fourth clusters consisted of P3, P5 and P4 populations, respectively. One population from first cluster and P3, P5 and P4 populations can be used for conservation. This study highlights the phenotypic diversity of O. rufipogon populations existing in Sri Lanka across the geographic locations and Knowledge on such morphological diversity provides opportunities to design conservation strategies and the potentials of using particular population based on breeding objectives.



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Banaticla-Hilario, M. and Almazan, M. (2010). Field observation of wild rice populations in Vientiane, Laos. International Rice Research Institute, Los Baños, Laguna, Philippines, 12.

Banaticla-Hilario, M. C. N., Sosef, M. S., Mcnally, K. L., Hamilton, N. R. S. and Van Den Berg, R. G. (2013). Ecogeographic variation in the morphology of two Asian wild rice species, Oryza nivara and Oryza rufipogon. International Journal of Plant Sciences, 174, 896-909. doi :

Center, A. R. (2007). Descriptors for wild and cultivated rice (Oryza spp.).

Chuanren, D., Bochu, W., Pingqing, W., Daohong, W. and Shaoxi, C. (2004). Relationship between the minute structure and the lodging resistance of rice stems. Colloids and Surfaces B: Biointerfaces, 35, 155-158. Doi:

Clayton, W. D. and Renvoize, S. A. (1986). Genera graminum. Grasses of the World. Genera graminum. Grasses of the World., 13. doi: DOI:

Duistermaat, H. (1987). A revision of Oryza (Gramineae) in Malesia and Australia. Blumea, 32, 157-193.

Ge, S., Zhang, D.M., Wang, H.Q. and Rao, G.Y. (1997). Allozyme variation in Ophiopogon xylorrhizus, an extreme endemic species of Yunnan, China. Conservation Biology, 11(2), pp.562-565.doi:

Grillo, M. A., Li, C., Fowlkes, A. M., Briggeman, T. M., Zhou, A., Schemske, D. W. and Sang, T. (2009). Genetic architecture for the adaptive origin of annual wild rice, Oryza nivara. Evolution, 63, 870-883. doi:

Hien, N. L., Sarhadi, W. A., Oikawa, Y. and Hirata, Y. (2007). Genetic diversity of morphological responses and the relationships among Asia aromatic rice (Oryza sativa L.) cultivars. Tropics, 16, 343-355. doi:

Kariali, E., Kuanar, S. R. and Mohapatra, P. K. (2008). Individual Tiller Dynamics of Two Wild Oryza species in Contrasting Habitats. Plant Production Science, 11, 355-360. doi:

Kurlovich, B. (1998). Species and intraspecific diversity of white, blue and yellow lupins. Plant Genetic Resources Newsletter, 23-32.

Liyanage, A. and Senanayake, G. (2010). The Atlas of Selected Crop Wild Relatives in Sri Lanka. Peradeniya: Department of Agriculture, Sri Lanka.

Maduakor, H. and Lal, R. (1989). Root system to growth and yield of cassava (Manihot esculenta Crantz) as affected by plant population in an arid soil. J. Root Crops, 15, 115-122.

Minitab, I. (2014). Minitab release 17: statistical software for windows. Minitab Inc, USA.

Oka, H. (1988). Origin of cultivated rice. Japan scientific societies press. Elsevier, Tokyo.

Ren, F., Lu, B.-R., Li, S., Huang, J. and Zhu, Y. (2003). A comparative study of genetic relationships among the AA-genome Oryza species using RAPD and SSR markers. Theoretical and Applied Genetics, 108, 113-120. DOI:

Richards, R. (2000). Selectable traits to increase crop photosynthesis and yield of grain crops. Journal of experimental botany, 51, 447-458.doi:

SAS, S. (2002). 9.1 (Version 9.1. 3 Service Pack 4). Cary, NC: SAS Institute Inc.

Song, Z., Li, B., Chen, J. and Lu, B. R. (2005). Genetic diversity and conservation of common wild rice (Oryza rufipogon) in China. Plant Species Biology, 20, 83-92.doi:

Vaughan, D. A. (1989). The genus Oryza L.: current status of taxonomy, IRRI Los Baños, The Philippines.

Vaughan, D. A. (1994). The wild relatives of rice: a genetic resources handbook, Int. Rice Res. Inst.

Vaughan, D. A., Morishima, H. and Kadowaki, K. (2003). Diversity in the Oryza genus. Current opinion in plant biology, 6, 139-146. doi:

Young, A., Boyle, T. and Brown, T. (1996). The population genetic consequences of habitat fragmentation for plants. Trends in ecology & evolution, 11, 413-418.doi:

Zafar, N., Aziz, S. and Masood, S. (2004). Phenotypic divergence for agro-morphological traits among landrace genotypes of rice (Oryza sativa L.) from Pakistan. International Journal of Agriculture and Biology (Pakistan).

Zhao, Y., Vrieling, K., Liao, H., Xiao, M., Zhu, Y., Rong, J., Zhang, W., Wang, Y., Yang, J., Chen, J. and Song, Z. (2013). Are habitat fragmentation, local adaptation and isolation‐by‐distance driving population divergence in wild rice Oryza rufipogon?. Molecular Ecology, 22(22), pp.5531-5547. doi:

How to Cite
Sandamal, S., Tennakoon, A., Ratnasekera, D., Amarasekera, D., & Marambe, B. (2018). Eco-geographic variation of common wild rice - Oryza rufipogon Griff. in Sri Lanka. Plantae Scientia, 1(02), 36-43.
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