Progeny derived from oospores produced through hormonal stimulation by each of four metalaxyl-resistant (M r ) mutants of Phytophthora parasitica segregated in a ratio fo 3 resistant: 1 sensitive. Each of two chloroneb-resistant (Cn r ) mutants also gave rise to selfed progeny with a segregation ratio of 3 resistant: 1 sensitive. These results indicate that metalaxyl resistance and chloroneb resistance in these mutants are each conferred by a single dominant gene in the heterozygous condition (...)
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Ting‐Shou Chang (1990) studied this question.