Abstract
Progeny from two crosses of race 0× race 2 of Cochliobolus carbonum segregated in 1:1 ratios for loci controlling mating type, fungicide tolerance, and ability to sporulate on potato-dextrose agar. Segregations at single loci also were observed for three isozyme systems and for one of two bands in a fourth system. Progeny also segregated for four esterase bands, but the segregation patterns were complex. Pathogenicity to corn was inherited as two apparently complementary genes present in race 2 but lacking in race 0, which was avirulent on corn. Evidence was found for a new locus for production of pseudothecia and a new locus for production of asci and ascospores. These putative loci differ from the previously described single loci for pseudothecium and ascospore production in C. carbonum [...]
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