Breeding for salt tolerance in rice
2003
Ansari, R. | Shereen, A. | Alam, S.M. | Flowers, T.J. | Yeo, A.R.
Soil salinity, submergence, and drought are major abiotic factors that affect the growth of rice. Of these, salinity poses a major threat because most rice is grown in areas with saline or salt-prone soils. Efforts to breed for increased salt tolerance have generally had only limited success. There is a need to integrate knowledge gained on physiological traits with the desirable characters from the breeder's point of view to combine salt tolerance with economic yield. Mortality during early seedling growth, survival of seedlings after transplanting, ratios of leaf chlorophyll a/b, low sodium accumulation in the shoot, selective absorption of potassium leading to a favorable Na/K ratio, and distribution of sodium among leaves are factors evident at early growth stages that may determine the ultimate crop response under saline conditions.
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