الفهرس 
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Abstract
Three experiments were conducted during the three constitutive seasons
(2013 , 2014 and 2015 ) for sesame populations which resulting from F2 in
agriculture experimental station .The four populations were derived from
crossing among the six parents i.e., population 1 (for Shandaweel 3* Line N.A
673* Line N.A 357-11-1), population 2 (Line N.A b14* Line N.A 289* Line
N.A 560), population 3 (Shandaweel3 * Line N.A 560 *Line N.A b14) and
population 4 (Line N.A 560* Line N.A 289* Line N.A 357-11-1) which were
grown in 2013 season. Seeds of F2 plants were planted in separate rows.
Visually, 1200 F2 plants were selected according to phenotype; giving
preference to drought tolerance. Each plant was harvested separately and
planted in a separate row in the F3 generation under three water regimes, 300
plants for each water regime in 2014. selection of plants from the planting in
the F3 generation was done in the same way. According to some yield
components, 25 F4 families’ plants were selected from each combination and
planted under the three water regimes in 2015. At harvest, the best 10 lines per
combination were selected based on drought tolerance traits. The results can
be summarized as follow: The results implied that there were considerable
genetic variations among evaluated populations. The results clearly indicated
that any change in the amount of irrigation water less than optimum condition
reduces the1000-seed weight and yield. The population No.4 which had high
RWC, WUE, proline and enzymes activity under stress conditions and may be
considered more drought tolerance. The results inveterate the effectiveness of
the RAPD markers for the detection of polymorphism among sesame
genotypes based on estimation of similarity coefficients for the identification
of genotypes and hybrids by distinctive fingerprints. Thermal images were
more effective for selecting sesame genotypes for drought.