栗疫病菌菌株的毒性联合与毒性分离现象的初步研究  

A preliminary study on virulence association and dissociation among Cryphonectria parasitica isolates in China

作　　者：万开元[1] 秦岭[2] 黄宏文[1] 

机构地区：[1]中国科学院武汉植物研究所,武汉430074 [2]北京农学院园艺系,北京102206

出　　处：《植物病理学报》2003年第1期14-18,共5页Acta Phytopathologica Sinica

摘　　要：对来自 3个中国板栗居群的共 18个栗疫病菌株进行单株及混合菌株的毒力评价 ,结果表明各单株毒力差异显著 ,混合菌株存在毒性联合与毒性分离现象。同一种群的组合中有 6 4 4 %为毒性联合 ,不同种群的组合其毒性分离率高达 88%,同一种群组合的毒性联合强度比不同种群组合的毒性联合强度大 ,而不同种群组合的毒性分离强度比同一种群组合的毒性分离强度大。大多数组合的毒性联合或毒性分离的性状表达稳定。Virulence on the single isolate and the two-mixed isolates of 18 Cryphonectria parasitica isolates were evaluated. The results suggested that virulence of the single isolates were significantly different from each other. Virulence association and dissociation were observed. Within the same population, 64.4% combinations of the mixed isolates were virulence associating, while between populations, 88% combinations of the mixed isolates were virulence dissociating. The degree of virulence associating of the mixed isolates from the same population was higher than that from different populations, but the degree of virulence dissociating of the mixed isolates was higher than that from the same population. In most cases, virulence association and dissociation of mixed isolates were observed repeatedly.

关 键 词：栗疫病菌 毒性联合 毒性分离 单株 混合菌株 板栗 

分 类 号：S436.64[农业科学—农业昆虫与害虫防治]