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当前位置: 首页 > 文章 > 不同白术产区根腐病菌致病力分化初步研究 河南农业科学 2015,44 (9) 69-72
Position: Home > Articles > Pathogenicity Differentiation of Fusarium oxysporum Strains from Atractylodes macrocephala Koidz in Different Areas Journal of Henan Agricultural Sciences 2015,44 (9) 69-72

不同白术产区根腐病菌致病力分化初步研究

作  者：
杨成前;余中莲;雷美艳;曹厚强;韩凤;全建;吴中宝
单  位：
重庆市药物种植研究所
关键词：
白术;根腐病;尖镰孢菌;致病力分化;抗病性
摘  要：
探索不同产区白术根腐病菌致病力特点和不同类型白术对根腐病的抗病性,为白术根腐病抗病育种及综合防治提供理论依据。以4种不同类型白术为鉴别寄主,对来源于3个白术产区的27株根腐病分离菌株进行致病力测定,根据4个鉴别寄主抗病反应和病情指数进行SPSS 19.0分层聚类分析,确定不同产区病原菌致病力类型及其分布。结果表明,27株分离菌接种不同类型白术后病情指数为18.2~100.0,平均病情指数32.5~88.7,根据分层聚类结果,供试菌株可分为强、中、弱3种致病力类型:强致病力菌株(Ⅰ)有12株,占44.4%;中等致病力菌株(Ⅱ)11株,占40.7%;弱致病力菌株(Ⅲ)4株,占14.8%。27株分离菌具有较为明显的地域特征,重庆产区分离菌的致病力最高,强致病力菌株占该地区菌株的66.7%,其次为湖北产区,最低为浙江产区,强致病力菌株仅占12.5%。根据4个类型白术对27个菌株的抗病反应及平均病情指数,其抗病性强弱依次为狭叶矮株>阔叶矮株>狭叶高株>阔叶高株。综上,3个白术产区均具有强、中、弱不同致病力类型菌株,但菌株表现区域化特征;4种不同类型白术抗病性存在差异,各白术产区应制定针对性的品种选育及引种策略。
译  名：
Pathogenicity Differentiation of Fusarium oxysporum Strains from Atractylodes macrocephala Koidz in Different Areas
作  者：
YANG Chengqian;YU Zhonglian;LEI Meiyan;CAO Houqiang;HAN Feng;QUAN Jian;WU Zhongbao;Chongqing Institute of Medicinal Plant Cultivation;
关键词：
Atractylodes macrocephala Koidz;;root rot;;Fusarium oxysprum;;pathogenicity differentiation;;disease resistance
摘  要：
A total of 27 different pathogen strains were isolated from the tissues of A. macrocephala which displayed symptoms of root rot in Chongqing,Hubei,Zhejiang provinces. Their pathogenic differentiation to four plant types was tested by artificial inoculation in greenhouse,and it was examined with hierarchical cluster combination by SPSS 19. 0. The results showed that the disease index of the 27 strains pathogenicity ranged from 18. 2 to 100. 0,with 32. 5—88. 7 on average. According to the hierarchical clustering for the tested strains 'pathogenicity,they were divided into three types: type Ⅰ( a severe virulence type) includes 12 strains,accounting for 44. 4%; type Ⅱ( an intermediate one) includes 11 strains,accounting for 40. 7%; and type Ⅲ( a mild one) includes 4 strains,accounting for 14. 8%. The tested strains showed significant regional characteristics,in which the pathogenicity of Chongqing isolates was highest,with strong virulent strains accounting for 66. 7%,followed by Hubei isolates,and the lowest for the Zhejiang isolates,with strong virulent strains accounting for only 12. 5%. According to the disease resistance response of the four types of A. macrocephala to the 27 strains of pathogen,their resistance showed narrow leaf-short plant > broadleaved-short plant > narrow leaf-high plant > broadleaved-high plant. In conclusion,the different pathogenic strains of severe,intermediate,and mild virulence existed inall the three areas,but they showed regionalization characteristics; the resistance was different among the four types of A. macrocephala,so the planting areas need develop targeted breeding and introduction strategies.

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