SCAB RESISTANCE OF INTERNATIONAL WHEAT GERMPLASM

Data are presented on Fusarium head blight (FHB) or head scab resistan ce of 96 winter wheat, 2 winter triticale and 38 spring wheat genotype s. The genotypes have been evaluated after artificial inoculation in o ne or more seasons from 1992 to 1995. The disease development was esti mated by visual scorings. A standardized area under the disease progre ss curve (SAUDPC) was calculated to estimate disease severity. The sin gle trials were analyzed according to their experimental designs. The mean values of the single trials were then subjected to an analysis ac ross years and least square means were calculated for all genotypes. C onsiderable variation for scab resistance was found. A number of wheat genotypes showed consistently low levels of scab attack, for instance Sumei #3, CM 82036, Wuhan-lines and Frontana (spring types) as well a s Sgv-NBMM-Sum3.11, BVAL-lines and Praag 8 (winter types). Some of th e resistant genotypes are used in practical breeding and for genetic s tudies as well as for the identification of molecular markers for scab resistance.