الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Apricot is considered one of the most important types of stone fruit in Egypt and the world. Alamar region is considered one of the most important Apricot agriculture areas in Egypt, which its trees distinguished with high quality fruits. This invites to work of expanding the cultivation of these trees in all Egyptian lands.This study aims to: Assessment of some different seedy strains of Alamar Apricot rootstock origin under salinity stress. In order to select best genotypes to recommend its cultivation in arid lands. For contribute to the ongoing efforts for improving salinity tolerance in many fruit trees, through: Molecular assessment for some selected Apricot seedy strains which promising to salinity tolerance using two molecular marker techniques (SCoT and ISSR). Assessment of these strains in terms of P5CS gene expression activity which is major gene in catalyzing proline synthesis which plays an important role in plant adaptation with abiotic stresses. Performance assessment of these strains in terms of some stress-related phytochemical parameters as well as many vegetative, chemical and phytochemical characteristics under salinity stress. In conclusion , the strain A3 could be utilized as a source of salinity tolerance-related genes in Alamar apricot rootstock. In addition, we recommend propagating this strain by vegetative growth (cuttings) to widespread in reclaimed lands and salt land up to 2000ppm.