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Development of a varietial screening procedure for salt tolerance of rice (Oryza sativa L.) varieties at germination stage

Authors:

P. K. Dissanayake ,

Sabaragamuwa University of Sri Lanka, LK
About P. K.
Department of, Export Agriculture, Faculty of Agricultural Sciences, Sabaragamuwa University of  Sri Lanka, Belihuloya, 70140
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A. W. Wijeratne

Sabaragamuwa University of Sri Lanka, LK
About A. W.
Department of, Agribusiness Management, Faculty of Agricultural Sciences, Sabaragamuwa University of Sri Lanka, belihuloya, 70140
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Abstract

Germination rates were studied using four salt tolerant varieties (At 95-26-4, At 401, Pokkali, Bw 400), one with unknown reaction to salinity (Bg352) and two salt susceptible varieties (Bg 94-1, Bg 350). In the experiment hundred seeds from each of the above varieties were placed in each Petri dish of different salt concentrations (pre test; 0 ds/m, 10 ds/m, 20 ds/m, 30 ds/m and in the experiment; 0 ds/m, 18 ds/m, 21 ds/m, 24 ds/m, 27 ds/m). The pre test was conducted to find out the effective range of salt concentration for the test.

There were no significant differences in germination rate among the varieties until 20ds/m salt concentration. Germination rates of all the varieties at 30ds/m salt level were significantly suppressed compared to lower salt level. Salinity tolerant varieties maintained high germination rate up to the level of salt at 21ds/m, whereas salinity susceptible varieties maintained only up to 20ds/m. The results of this study indicated that the rate of seed germination of salinity susceptible varieties were significantly different from salinity tolerant varieties at 21 ds/m salt level. Results emphasized that the salt concentration of 21ds/m can be used as a tool to distinguish between susceptible and resistance rice varieties at the seedling stage by comparing germination rate.
How to Cite: Dissanayake, P.K. & Wijeratne, A.W., (2006). Development of a varietial screening procedure for salt tolerance of rice (Oryza sativa L.) varieties at germination stage. Journal of Agricultural Sciences. 2(1), pp.63–72. DOI: http://doi.org/10.4038/jas.v2i1.8114
Published on 04 Jan 2006.
Peer Reviewed

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