واکنش عملکرد علوفه و خصوصیات مرتبط به تنش خشکی در بروموس اینرمیس(علف پشمکی)

Drought serves as one of the most important abiotics affecting crop growth and production. This study was conducted to evaluate the response of forage traits of 25 Half-Sib families of Bromus inermis under two irrigation levels (drought stress and non-stress) in two harvests according to a randomized complete block design. All forage traits except percent of dry matter in first and second cuts were decreased under drought stress condition. Traits percent dry matter in first and second cuts increased more than 42 and 18 percent under drought stress. The highest and lowest broad sense heritabilities and narrow sense heritability under two irrigation levels was observed for ear of emergence and persistency respectively. Result indicated that high genetic variation was found in the studied population which can be used for future breeding programs.