پديد آورندگان :
عزيزي، هما نويسنده دانشگاه فردوسي مشهد,دانشكده كشاورزي; Azizi, H , نظامي، احمد نويسنده دانشگاه فردوسي مشهد,دانشكده كشاورزي; Nezami, A , نصيري محلاتي، مهدي نويسنده دانشگاه فردوسي مشهد,دانشكده كشاورزي; Nassiri Mahallati, M , خزاعي، حميدرضا نويسنده دانشگاه فردوسي مشهد,دانشكده كشاورزي; Khazaie, H.R.
كليدواژه :
گندم , بقاء , خوسرمايي , DMT50 , LT50
چكيده لاتين :
In order to determine freezing tolerance of 14 wheat cultivars including Anza, Bezostaja, Pishtaz, Tous, Zagros, Zarrin, Shahryar, Falat, Qods, Glenson, Maron, Navid, Niknejad and MV-17 that were grown on field, samples of each cultivar after hardening in the field were harvested in 4-6 leave stages and trimmed to 2cm above and below the crowns and put on the thermogradient freezer. After freezing in the range of 0 to -20 °C, samples were transferred to the greenhouse and planted in the pots. Survival percentage, height, leaf area, chlorophyll content, dry weight, LT5o and DMT50 were determined after 3 weeks. Survival percentage after freezing was different in cultivars (P<0.05). Glenson and Maron cultivars had the highest (72.2%) and the lowest (24.4%) survival, respectively. Cultivars were different in height, leaf area, chlorophyll content, dry weight, LT50 and DMT50. Glenson was the most cold tolerant cultivar (LT50=-15.8 °C) and Maron was the most sensitive cultivar (LT50=-3.7 °C). Conducting further experiments in controlled and field conditions and study of correlations, leads to more reliable results from controlled experiments.
