الفهرس 
IntroductionOnly 14 pages are availabe for public view
Abstract
The present study was under taken at shandaweel agric.res stat ., agric.res.center
Ministry of agric .,Egypt ,during three winter seasons of 1998/99-2000/2001.
The object of the present investigation was to study theresponse to ection in two wheat populations under normal and drought environments ,using pedigree selection methods , also to study genetic components of variability in f2,f3andf4 generation . the phenotypic and genotypic correlation coefficients among grain yield/plant with the studied traits and drought succeptibility index forgrain yield were computed .
The materials used inthose studies were two wheat population as follows :-
1-population I:Giza 165 ×Nacozari-76
2-Population II:debeira ×cham 6
The f2 plants were used as abase population for selection to drive f 3 and f4 generations .In addition , the check cultivar for drought tolerance was (sahel 1)