تعیین مهم‌ترین‌‌ صفات تعیین کنند‌ه عملکرد ارقام مختلف برنج در شرایط نرمال و تنش خشکی

To evaluate the effect of drought stress on yield and yield related traits, the 14 rice genotypes including (5 varieties of native and 9 foreign cultivar) in randomized complete block design with 3 replications in two environments (without stress flooding and water stress) in 1390 studied in Aliabad farming research. Analysis of variance showed significant differences among genotypes for all the traits studied, there are two circumstances. The highest average yield stress of belonged to genotype lR83752-B-B12-3 and Sepedroud . Path analysis showed different characteristics in explaining yield and drought stress condition involved, so that the stress condition, the number of panicle in drought conditions, number of filled grains per panicle had the highest positive direct effect on yield, respectively. The results of this study showed that the number of panicle and the number of filled grains per panicle as the most important agronomic traits to select varieties with high yield, respectively, under non-stress conditions (flooding) and is a drought.