Yield performance and berry sensory attributes in 10 grape cultivars were studied under Assiut
conditions. In addition, the genetic variability and relationships among these cultivars were determined
based on RAPD and SRAP molecular markers. Genetic variations were observed between the tested
cultivars in all studied traits of yield and yield components as well as in berry sensory attributes. 100 sites
of grape genome were amplified by RAPD and SRAP primers and used to study the interrelationships
between 10 grape cultivars. The highest interrelationships were found between “Black Muscat and
Provano”, “Palomino and Bez El-Naka”, and between “Palomino and Ruby Seedless”. The lowest
relatedness was found between Beauty Seedless and the other nine grape cultivars. The phenotypic data
and molecular markers were effective in estimating the genetic variability between grape cultivars. The
study indicated the presence of abundant genetic variability among some of the important commercial
grape cultivars. Significant positive correlation was found between the phenotypic and genotypic distance
indicated that the studied RAPD and SRAP markers were able to bind to effective regions in the genome.