Pathogenicity test showed that ratio of avirulent progenies to virulent oneswas approximately 1 : 1, indicating that a single locus confers the avirulence in S1522 to Tsuyuake.

• 致病性测定结果表明：这些后代菌株在梅雨明上的致病个体与不致病个体的比例近等于1：1。