安徽农业大学学报2011，Vol.38Issue(3)：319-322,4.DOI:CNKI:34-1162/S.20110421.1149.002
辣椒疫霉交配型及其与对辣椒致病力的关系初步研究
Preliminary studies on relationship between mating type and pathogenicity of Phytophthora capsici
摘要
Abstract
Twenty-two isolates of Phytophthora capsici Leonian were obtained from the diseased pepper plants collected in Hefei, Huainan, Hexian, Qianshan and Yuexi by means of tissue isolating method in order to know about the mating type distribution and pathogenicity difference. The test of mating types of the isolates of P.capsici from different areas was carried out by matching pairs with standard isolates, and the pathogenicity was investigated by using two pepper cultivars with leaf in vitro inoculation. The results showed that there existed two mating types of A1 and A2 in the tested isolates of P. capsici. A2 was the predominant and distributed in all sampling regions with frequency of 81.8％. There was significant difference in pathogenicity to different pepper cultivats. The average disease severity of the detached leaves of pepper Yanyang ranged from 1.0 to 4.8 and the the average disease severity of the detached leaves of pepper Hefengtianrui ranged from 1.5 to 4.5. The isolates collected from different regions showed different pathogenicity while the pathogenicity of isolates from the same region also showed difference. The pathogenicity of P. capsici was related with pepper cultivars, but there was no significant correlation between mating type and pathogenicity of the isolates P. capsici.关键词
辣椒疫霉/交配型/致病力/相关性/辣椒Key words
Phytophthora capsici Leonian/ mating type/ pathogenicity/ correlation/ pepper分类
农业科技引用本文复制引用
李萍,戚仁德,杨光红,许周典,高智谋..辣椒疫霉交配型及其与对辣椒致病力的关系初步研究[J].安徽农业大学学报,2011,38(3):319-322,4.基金项目
安徽省自然科学基金项目(070411028)和农业部公益性行业科研专项(3-20)共同资助. （070411028）
