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不同地区松茸ITS序列分析及系统发育研究Analysis on rDNA-ITS Sequence and Research of Phylogeny of Tricholoma matsutake

2012-02-15 11:142140

【作者】 刘磊; 周广麒; 李长田; 金华;

【Author】 LIU Lei1,ZHOU Guang-qi1,LI Chang-tian2,JIN Hua3(1.Dalian Polytechnic University,Dalian Liaoning 116034;2.Jilin Agricultural University,Changchun Jilin 130118; 3.Dalian Nationalities University,Dalian Liaoning 116600)

【机构】 大连工业大学; 吉林农业大学中药材学院; 大连民族学院;

【摘要】 对吉林省延吉市和云南省昆明市松茸子实体的ITS序列进行遗传多样性研究。提取两个地区松茸子实体的基因组DNA,应用特异引物对其ITS序列进行PCR扩增及测序,并对云南省昆明市松茸样品进行克隆及测序。之后从GenBank上获取5个地区7条松茸ITS序列,并利用MEGA、BLAST、DNAMAN和ClustalX软件进行对比分析和构建系统发育树。对云南松茸样品克隆发现,ITS序列中有A与G、T与C的颠换,并插入1个碱基T。序列对比发现,松茸ITS序列长度在600 bp~604 bp范围内,G+C含量在43.0%~44.2%之间,共有41个变异位点,ITS2变异位点数要多于ITS1的变异位点数。同时,多个位点存在着转换、颠换、插入和缺失,表明不同产地松茸ITS序列在进化过程中存在差异,为真菌分类、鉴定等研究提供了重要的资料和依据。

【Abstract】 Genetic diversity of the genomic DNAs in the fruiting bodies of Tricholoma matstutake sampled by ITS in Yanji Jilin and Kunming Yunnan Province were studied.The genomic DNAs in the fruiting bodies of Tricholoma matstutake sampled from Yanji Jilin and Kunming Yunnan were extracted and the ITS sequence was amplified by PCR with its specific primer and sequenced respectively.Seven ITS sequences from 5 different regions were got from GeneBank and compared by MEGA、BLAST、DNAMAN and ClustalX programs w...

【关键词】 松茸; 遗传多样性; ITS序列; 鉴定;

【Key words】 Tricholoma matstutake; Genetic diversity; ITS sequence; Identification;
 
【基金】 吉林省科技厅项目(21200253)

【分类号】S646.9
 

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