Articles
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
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
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. and 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 – Sri Lanka, 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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