Abstract
Twelve grain sorghum genotypes, known to have different response to salt at later stages of growth under field conditions, were evaluated for salt tolerance at seedling stage. Three levels of ECF, namely 2, 6 and 10 mmhos cm’ obtained by NaCI solution, plus distilled water as a control.The results showed that increasing soil salinity levels significantly decreased dry weight of shoots and roots as well as root volume of the tested genotypes at seedling stage. The genotypes differed significantly in these characters under soil salinity conditions. The most salt tolerant genotype G.114, as identified under field condition at maturity stage, had significantly highest dry weight of shoots and roots as well as root volume under highest salinity levels at seedling stage compared with lower salt tolerant genotypes. The obtained results indicate that relative salt tolerance for seedling reflect the tolerance of adult grain sorghum plants. The selection for dry weight of shoots and roots as well as root volume of seedlings under high soil salinity conditions is recommended as a method for screening for salt tolerance in grain sorghum crop at seedling stage prior to yield testing under field conditions.Keywords:salt tolerancegrain sorghumsalt stressselectionseedling growth
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