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Agronomic characters of some traditional rice (Oryza sativa L.) cultivars in Sri Lanka

Authors:

A L Ranawake ,

University of Ruhuna, Kamburupitiya, LK
About A
Department of Agriculture Biology, Faculty of Agriculture
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U G S Amarasingha,

University of Ruhuna, Kamburupitiya, LK
About U
Department of Agriculture Biology, Faculty of Agriculture
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N Dahanayake

University of Ruhuna, Kamburupitiya, LK
About N
Department of Agriculture Biology, Faculty of Agriculture
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Abstract

Grain yield in rice is a complex trait and highly dependent on the other agronomic characters. Agronomic characters and grain yield of twenty traditional rice cultivars were evaluated at Faculty of Agriculture, University of Ruhuna in Maha-2010/2011 and in Yala - 2011. The experiment was conducted according to the randomized complete block design with three replicates. Twenty plants from each cultivar were evaluated for the selected characters, Plant height, Leaf blade length, Leaf blade width, Number of tillers, Number of reproductive tillers, Panicle length, Number of spikelets per panicle, Number of fertile spikelets per panicle, Number of infertile spikelets per panicle, Seed length, Seed width, 100 seed weight and Yield per plant. Recommended modern rice cultivar Bg 379/2 was used as the reference. Deviations of each character in different traditional rice cultivars from those of recommended rice cultivar Bg 379/2 were recorded. The average plant height of the tallest rice cultivar, Podihatatha was 198 cm and that of the shortest rice cultivar, Rathranwee was 68 cm. The longest leafblade and longest culm length were also belonged to (9.6 tillers per plant) and the highest average number of reproductive tillers (9 per plant), were recorded by rice cultivar Mahasudu wee. The highest value of 100 seed weight was recorded by rice cultivar Galpa wee. However, the most important economical character, the highest yield per plant(28.52g/plant) was recorded by Thanthiribalan which was significantly higher than that of in the recommended rice cultivar Bg 379/2 (26.5 g/plant). Significant correlations were found between the yield per plant and the characters such as number of reproductive tillers (r = 0.692), panicle length (r =0.565) and number of spikelets per panicle (r = 0.761). Agronomic data collected in the present study would be important to understand the suitability of an individual rice cultivar for the farmer field.

DOI: http://dx.doi.org/10.4038/jur.v1i1.6150

Journal of the University of Ruhuna 2013 1(1): 3-9

DOI: http://doi.org/10.4038/jur.v1i1.6150
How to Cite: Ranawake, A.L., Amarasingha, U.G.S. & Dahanayake, N., (2013). Agronomic characters of some traditional rice (Oryza sativa L.) cultivars in Sri Lanka. Journal of the University of Ruhuna. 1(1), pp.3–9. DOI: http://doi.org/10.4038/jur.v1i1.6150
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Published on 12 Oct 2013.
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