ارزیابی صفات مورفولوژیک و تعیین مهم‌ترین اجزای عملکرد زیره سبز(Cuminum cyminum L.)

To evaluate the response of drought tolerance in medicinal plant, cumin , an experiment in normal and drought conditions were conducted. Different traits such as: height, branch, umbel per plant, seed per umbel, 1000-seed weight, biological and seed yield were measured. Analysis of variance showed significant differences among genotypes. Study of correlation showed positive and significant correlation between grain yield and all traits. The most correlation under drought stress showed with biological yield and number of umble per plant which explain their effect on drought resistance. In conclusion, due to a direct effect on the performance of both of the criteria, number of umbels per plant is variable trait for determining the production of cumin genotypes. In breeding programs to improve the yield and production of high yielding genotypes should be considered.