Exists in a number of physiologic races. Seventeen races based on reaction to 7 differential wheat varieties arranged in 6 groups according to their reaction to 6 accepted resistance types were proposed in the USA. Tilletia caries f.sp. monoccoci was proposed for a form that infected Triticum monoccocum. The spectrum of races has also been investigated in Germany, Turkey, USSR. The occurrence of new pathogenic races has been noticed and 39 pathogenic races of the bunt fungi based on combinations of 8 virulence genes are now recognized in the USA. There is a differential infection response among races at different temperatures.[1]
Seventeen races based on reactions to 7 differential wheat varieties and arranged in 6 groups according to their reactions to 6 accepted resistance types were proposed for T. caries and T. foetida (41, 142)[2]
Thirty-nine pathogenic races of the bunt fungi (which include T. caries and T. controversa) based on combinations of 8 virulence genes are now recognised in the USA[2]
Notice: The data in the table above is semi-automatically extracted from the description. Please be sure to check the original documents for accurate information.