Abstract
Main constraints of corn production increased are on dry marginal corn areas that have low productivity . Drought is one of the corn production constraints . Drought at any stage of corn growth greatly affects crop productivity . Increased maize production can be solved by using drought tolerant varieties . The purpose of this study was to determine the response of hail somaklona R1 plants in vitro selection result against drought stress and evaluate the physiological characteristics of drought tolerant plants somaklon . The r esults showed that ( 1) drought s tress on the reproductive phase caused a decrease number of seeds , dry weight of seed, cob , root and stemand ( 2) drought tolerant somaclonal variant have higher proline accumulation than sensitive variant somaclonal , but there is no correlation between drought tolerance somaclonal variant plants with a total sugar accumulation .
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