１９９９年９月，河北农业大学张志铭教授主持的“中国马铃薯晚疫病Ａ２交配型的研究”，通过了省科委组织的成果鉴定。该成果首次证明我国马铃薯主产区（河北、内蒙、山西等）存在晚疫病菌Ａ２交配型；首次发现我国马铃薯晚疫病菌群体中有低频率自育型菌株，表明该菌可进行单 September 1999, Professor Zhang Zhiming of Hebei Agricultural University presided over the “China’s potato late blight A2 mating type of research”, adopted the results of the identification of the Provincial Science and Technology Commission. The results showed for the first time that the P. infestans A2 mating type exists in the main potato producing areas of China (Hebei, Inner Mongolia, Shanxi, etc.). The low-frequency self-breeding strains of P. infestans in potato were found for the first time in China,