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对江苏、安徽两省9个县市的栗疫病病原菌菌株进行了营养体亲和性(VC)研究,结果表明,不素和类型可分为3种:Ⅰ型为强不亲和,抗衡区两侧形成明显分生孢子器带;Ⅱ型为弱不亲和,抗衡区内不形成分生孢子器;Ⅲ型为中等不亲和,只在抗衡区的某一侧形成分生孢子器带。可将219个菌株划分为131个营养体亲和组(VCG_s),从而推算出至少有8个VC基因控制菌株的营养体亲和性。根据两省、田间小区以及大病斑上菌株的VCG_s分析,我国板栗疫病菌的VCG_s比其他国家的复杂。本文还探讨了复杂的原因及利用低毒力菌株进行生物防治的可能性。
Nutritional compatibility (VC) of chestnut blight pathogen strains in nine counties of Jiangsu and Anhui provinces was studied. The results showed that there are three types of chestnut blight pathogens: type I The formation of obvious conidia belt on both sides; Ⅱ type is weak not affinity, no conidia in the contend area; Ⅲ is moderately unaffordable, only on one side of the concentric zone to form conidia band . 219 strains can be divided into 131 vegetative affinity groups (VCG_s) to deduce vegetative affinities of at least 8 VC gene control strains. According to the VCG_s analysis of the two provinces, the field plot and the strain on the big spot, VCG_s of the Chinese chestnut blight pathogen is more complicated than other countries. This article also explores the complex causes and the potential for biological control using low virulent strains.