基于形态特征和ITS序列对7个鹅膏菌属菌株的分类鉴定A Primary Studies on Classification and Identification of Seven Amanita Species Based on Morphological Characteristics and ITS Sequences of rDNA
李海波;吴学谦;魏海龙;付立忠;吴庆其;
摘要(Abstract):
以采自浙江省丽水地区的7个鹅膏菌属菌株作为研究材料,在基于形态特征进行初步鉴定的基础上,对7种鹅膏菌的rDNAITS区段进行克隆测序和序列特征比较分析。进一步对ITS序列进行核酸序列数据库GenBank同源性检索比对,将从GenBank检索获得的9个最相似物种的ITS序列连同7种鹅膏菌的ITS序列一起作系统发育分析。结果表明:基于ITS序列对f6、f9和f493个菌株的分子鉴定支持了基于形态特征的鉴定结果,对f5的分子鉴定不支持形态鉴定的结果,f8为鹅膏菌属内某种,f66为鹅膏菌属内某种,并与Amanitafulva,A.atrofusca,A.orientifulva3种鹅膏菌的亲缘关系较近,f7与另外6种鹅膏菌的亲缘关系相差甚远。研究结果提示基于分子水平上的ITS序列分析不能单方面作为大型真菌分类鉴定的可靠依据,可以作为基于传统形态学分类鉴定的辅助参考依据。
关键词(KeyWords): 鹅膏菌;rDNA;内转录间隔区(ITS);序列分析;分类鉴定;大型真菌
基金项目(Foundation): 浙江省重点科技攻关项目(2004C22032、2006F11003);; 浙江省自然科学基金资助项目(Y304403)
作者(Authors): 李海波;吴学谦;魏海龙;付立忠;吴庆其;
DOI: 10.13341/j.jfr.2007.01.006
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