Introduction of two new wheat genotypes in normal and drought stress of Mazandaran

Drought is the most environmental stress which decrease wheat yield in more often region of the world. Until Five years ago to now, by  climate changing  in Caspian Sea regions has decreased not only rainfall amount annualy from 1000 mm to 300 mm but also  it’s dispersion can’t remove water requirements of wheat .Therefore, Nineteen bread wheat genotypes, with one check (Morvarid) were studied in irrigation and drought treatments. On basis of variance analysis, It was showed  significant different among  grain yield  yield components of genotypes such as Spike Number  in meter square and Spike Weight in difference in  water field capacity. Results of step wise regression analysis recognized that, four traits were entered into stepwise regression model including Seed Numbers per Spike, Kernel Weight, Biological Yield and Harvest Index in drought treatment. In semi moisture treatment two traits Biological and Harvest Index and in normal treatment, three traits; Seed Numbers per Spike, Kernel Weight, Biological Yield were entered in to multi-regression equal.Therefore, in three moisturetreatment, genotype No.11 (BABAX/LR42//BABAX*2/3/VIVITSI) were identified as superior genotype in droughtand high land environments andNo. 19 (SABUF/7/ALTAR 84/AE.SQUARROSA (224)//YACO/6/CROC_1/…) for high rainfall and low lands environments.