بررسی رابطه صفات زراعی با عملکرد در ژنوتیپ‌های گندم تحت شرایط تنش خشکی

To investigate the yield and agronomic traits of wheat genotypes in drought condition and also to determine the relationship of these traits with grain yield, a field experiment was conducted with 43 genotypes using a Randomized Complete Block design in three replication at Islamic Azad university, Khorramabad, Iran in 2012-2013 cropping season. Evaluated traits were: day to maturity, day to pollination, grain filling rate, grain filling period, plant height, second internode length, peduncle length, peduncle extrusion, spike length, flag leaf length, spike weight, grain per spike, harvest index, thousand weight kernel, grain weight per spike, spike per square meter, biological yield, garin yield. Two traits (biological yield and plant height) enter in the regression model using stepwise regression and totally they 97.9 percent of data variation. Path analysis in drought stress condition showed that the biological yield, height plant had the most positive effect on the grain yield. Results of the study use of these traits indirect selection criteria to improve yield under drought stress in wheat genotypes validates.