Reaction of some sunflower genotypes to drought stress tolerance using indicators

This study aimed at determining the rate of tolerance to welter in conditions of none water using experimental epilate stripe plan including welter sensivity, tolerance and stress tolerance indices, (GMP),(MP) with three replicates in 2011-2012 in Damghan city. Result shows that with been types proud action grain variation was significant (P<0/05). In condition without stress Types 33 with 4790 kg. ha had maximum production and also in stress condition type 33 with been 2645 hg had maximum production and maximum Index rate (STI)was in top stress depended type. Type 33 shows Maximum (MPL) (GMP) and the correlation of index with production in normal condition and stresscondition shows that production in stress condition YS significantly correlated with (YP) and Index. Totally except sensitivity index in (SSI) and correlation (YP) With STI,MP,GMP, TOL significant correlation was found between MP with STI and GMP, and also STI with GMP. But maximum correlation was found between MP and GMP. SSI Shows no significant correlation with all indices. The result showed that the STI. MP, GMP, Indices were appropriate for estimating production.