The aim of this study was to evaluate type I and type II resistance reactions to FHB for 28 wheat cultivars grown in a greenhouse. The inoculation of Fusarium graminearum was performed in the flowering stage. For type I resistance, the assessment was made at 21 days after inoculation. The disease severity was determined in the dry ear stage, as well as the percentage of scabby grains. The evaluation of disease severity was performed by using the percentage of infected spikelets in the green ear stage, assigning a score on a linear scale from zero (no infection) to 100 (100% infected spikelets). For type II resistance, assessments were performed at 7, 14 and 21 days after inoculation by counting the spikelets with symptoms, excluding the two inoculated spikelets. The cultivars Frontana, BRS 177, BRS 179, BRS Umbu, BRS Camboim, Abalone, Onyx, Pampeano and Fundacep 30 showed less disease severity and lower percentage of scabby grains, demonstrating thus potential to be sources of type I resistance. The cultivars BRS Guamirim, CD 120, Onyx, Ruby, Fundacep 50, BRS 179, Pampeano, Abalone, CD 114, IPR 85, Safira, BRS Louro, CD 117,CDF 2002116, CD 115, BRS 177, CD 0529 and BRS Camboim showed the smallest area under the disease progress curve, demonstrating thus type II resistance.
Triticum aestivum; Fusarium graminearum; Giberella zeae
