Absract:The objective of this study is to investigate the effect of the interaction between salinity and plant growth regulators (Kinetin and gibberellin) on the salt tolerance of two bread wheat cultivars (Dijilla) and (Tamooze-2) under salinity conditions. The present study was conducted to assess the effects of Kinetin and gibberellin on plant dry matters (shoots and roots), chlorophyll content and stability in upper leaves, salt tolerance index, and organic contents in plant leaves of the two cultivars grown in salinized soils at two levels (0 and 16 ds/m). Seeds of both cultivars were sown in plastic pots which filled with the salinized soil in glass house during 2014-2015 sessions. Selected cultivar gave the highest dry matters, chlorophyll content and stability, and salt tolerance index under salinity condition as compared with local cultivar. Also the selected cultivar had the highest organic compounds in their leaves, especially under salinity condition. Both plant growth regulators were effective in increasing all the measured characters of both cultivars under non-saline condition but at salinity condition were effective in selected cultivar only. The Kinetin was more effective than the gibberellin in their effect on the salt tolerance of the plants under saline condition. Generally under these conditions the selected cultivar (Dijilla) was more salt tolerance than local cultivar.

Three genotypes of wheat developede for saltetoleranceethroughe plant breeding program and two local cultivars were screened for genetic variation under salinity conditions through RAPD and ISSR markers. Eight selected primers (OP1-06, OPE-16, OPN-07, OPO-17, OPD-20, OPL-05, OPI-01 and OPJ-13) were used in randomeamplifiede polymorphic eDNA (RAPD-PCR reaction) and three selected primers (UBC 809, UBC 810 and UBC 811) were used in ISSR markers. According to the results of the amplification and ISSR markers, the genetic distance and dendogram illustratedegeneticefingerprint and relationshipsebetweeneselected genotypes and local cultivars were determinant. Results revealed that there are genetics differences between the selected genotypes and the local cultivars in some specific segment at different size (bp) with all primers which used in this study, except the result of the primer (OPE-16) showed that there are no bands appeared in all selected genotypes and local cultivars. Other results of RAPD markers showed that there are differences among the selected genotypes in their banding patterns only with primers (OP1-06, OPN-07 and OPO-17) at different size. The results of ISSR markers showed differences that there are also differences between the selected genotypes and local cultivars in specific segment with the three primers which used, the selected genotypes were similar in banding patterns with UBC 809 and UBC 811primers. Genetically, the results showed that all the selected genotypes and local cultivars differed in their genetic distance, variations among the selected genotypes in their genetic distance. In conclusion the selected genotypes (salt tolerant) genetically differed from the local cultivars (salt sensitive).

Compare some wheat introduced genotypes from Pakistan with the local cultivars(Tamooz 2 and Mexipak), two field experiments were conducted at in Tiwatha andLatifya experimental stations during 2001- 2002 season. The experimental designwas RCBD with 3 blocks. Yield and its components were studied. The objective ofthis study was to screen and select of superior genotypes to the control. Results indicated that there were significant differences among the genotypes in their yield.The results of Tiwatha station showed that the genotypes P11, P13 were superior inyield when compared with other genotypes and local cultivars, while some genotypesgave the lower yield than the local cultivars. The results of Latifya station revealedthat all the genotypes gave higher yield production than the check cultivars expectthe genotypes P8. The genotypes P11, P12 were superior in yield when comparedwith the other genotypes and local cultivars. The results of combined analysis showedthat, Tiwatha station was superior in yield to the Latifya station, and the genotypesP11, P13 had more yield than the other genotypes and check cultivars.