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规定了掘氏疫霉有性后代单卵孢株的交配型及其遗传稳定性和致病力分化．结果表明，Ａ２和Ａ１Ａ２；型在遗传上不稳定，在单卵孢株保藏过程中可以发生变异，部分Ａ２菌株改变为Ａ１Ａ２型，而Ａ１Ａ２菌株改变为Ａ２交配型，但有部分Ａ１Ａ２菌株可以稳定保持其自孕能力．掘氏疫霉有性生殖后代发生明显的致病力分化现象，来自同一亲本的单卵孢后代对黄瓜、瓠子、笋瓜的致病力有明显差异，说明有性生殖对掘氏疫霉致病力变异可能起主要作用．
Stipulates the mating type, genetic stability and pathogenicity differentiation of the single offspring of Diphtheria. The results showed that the A2 and A1A2 genotypes were genetically unstable and could mutate during the isolation of the monozygotic isolates. Some A2 strains changed to A1A2 type, whereas A1A2 strains changed to A2 mating type, but some A1A2 strains could be stabilized Maintain their ability to conceive. Phytophthora dysenteriae sexual reproduction progeny obvious pathogenic differentiation phenomenon, from the same parent single-egg progeny of cucumber, razor clam, winter squash melon pathogenicity were significantly different, indicating that sexual reproduction on the Pseudomonas aeruginosa caused Disease variation may play a major role.