Improving the reproductive stage drought resistance of rice [study conducted in the Philippines]
1982
Garrity, D.P. | Novero, R.P. | Cruz, R.T.
Water control on most of the world's rice land is inadequate and the amount of grain yield lost due to water stress is massive. Improved and expanded irrigation facilities may gradually alleviate the drought problem in some areas. However, one-half of the world's rice land is currently still rainfed and most of this will remain so in the foreseeable future. Improved rice varieties for the rainfed areas must have the capacity to withstand drought stress and obtain high grain yields under limited moisture. In this paper we present results of two investigations concerning the improvement of drought resistance in the rice crop during the reproductive stage. The first study involved development of a field screening methodology for evaluating reproductive stage drought resistance. In the second study the infrared thermometer was tested as a means to differentiate genotypes on the basis of their ability to maintain transpiration during a drought period
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