The inheritance of resistance to three races ofTilletia foetida and two races ofT. Caries in a cross between white federation 38 and selection 1403 wheats
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Two wheats, Selection 1403 (HH, mm) and White Federation 38 (hh, MM, have been crossed and theirF 3 families tested for their reactions to three collections ofT. foelida.
On the basis of the reaction of each family to these collections, it has been found possible to identify the genotypes of theF 2 plants from which such families were derived.
The reactions of eight families to two collections ofT. caries has also been determined.
Resistance against collections 7 and 13 is provided by either theHH orMM gene, but neither is effective in controlling collection 8.HH is effective in controlling collection 9 but is ineffective against collection 11.MM is effective in controlling collection 11 but is ineffective against collection 9.
The bearing of this work on the breeding for bunt resistance and the classification of physiologic races on a genetic basis has been discussed.
KeywordsInfected Plant Wheat Variety Physiologic Race Parental Wheat Wheat Area
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