الفهرس 
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Abstract
Composite genotype (octamer hybri•j) was obtained from crossing among eight Egyptian hexaploid wheat cultivars differing in their tolerance to drought stress to produce a genotype, which can economize on the irrigation water requirements or can tolerate drought stress.
Gamma irradiation with 10-Krad was used to induce mutations, which could improve drought tolerance for this composite.
from eight Egyptian hexaploid wheat cultivars, two were chosen as drought tolerant and drought sensitive genotypes (G-160 and Sk-61, respectively). They were evaluated along with their F 1 and F2 for their relative drought tolerance for some yield-related trai’s.
Bulked segregant analysis developed some RAPD and SSR markers with different primers, which were considered as molecular markers for drought tolerance in wheat.
Ha/2-like gene was introduced into Egyptian wheat cultivar G-164 via microprojectile bombardment. Two putative transgenic plants were successfully detected by leaf painting with the herbicide basta. PCRI Southern blotting analysis indicated the presence of both/either bar and/or Ha/2-like genes in the genomic background of the two transgenic plants.
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