الفهرس 
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Abstract
The goal of this study is estimating the genetic diversity between ten sunflower parental inberd lines using ISSR and RAPD markers to know the superior parental lines and hybrids for the most important studied traits in sunflower to choose the best breeding programs. The results of present study confirms that:1-ISSR and RAPD marker are efficient in detecting polymorphism and genotype specific markers among sunflower inbred lines.2-ISSR technique is better than RAPD technique to obtain genotype specific markers in sunflower, but, RAPD technique is better than ISSR technique in order to get the highest percentage of polymorphism.3- ISSR and RAPD also determining the contrasts parents to gain heterosis and successful sunflower breeding programs.4-Results also demonstrated that parents who showed the lowest genetic similarity values among each other might be display the highest significant heterosis values in their crosses for most studied traits, especially yield and yield components.