بررسی عکس العمل ژنوتیپ‌های مختلف پنبه به بیماری پژمردگی ورتیسیلیومی پنبه

The Verticillium wilt disease is the most important limitating factor for the high potential yield and susceptible genotypes of cotton. This disease is prevalence in most of cotton fields. Yield losses are different due to various climatic conditions, cultivars and cultural practices in different countries and years. Use of resistant cultivars is the most economical method for disease control.
6 cotton genotypes (Varamin, Sahel, B-557, Crema, 818× 312 & Deform leaf) were selected from elementary research design and were assessed for Verticillium wilt disease in Randomized Complete Block Design (RCBD) with 4 replications in cotton research stations of Karkandeh (with soil infested natural). Results showed Varamin had the highest disease index (1.71) and Sahel (1.07), B-557 (1.13), 818×312 (1.25) and Deform leaf (1.79) had the lowest disease index, so these cultivars were the most tolerant cultivar. According to results and good yield and early maturity, B-557 cultivar can be used as tolerant parent to Verticillium wilt in hybridation and cross back with high potential yield cultivars.