秦皇岛地区三种野生食用菌分子鉴定与系统发育分析
Molecular Identification and Phylogenetic Analysis of Three Wild Edible Mushrooms in Qinhuangdao Area
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摘要: 以秦皇岛地区的肉蘑、嘎蘑和松蘑3种野生食用菌子实体为试材,使用真菌通用引物ITS1和ITS4对基因组rDNA的ITS区进行PCR扩增、克隆测序。将测序结果与GenBank数据库信息比对,并构建系统发育树,从分子水平上研究其分类地位和系统发育关系,以期为3种野生食用菌的合理开发和人工驯化奠定基础。结果表明:肉蘑与Chroogompus rutilus(MG457851.1)相似性最高(99%),嘎蘑与Lactarius akahatsu(EF685045.1)相似性最高(100%),松蘑与Suillus granulatus(MF421107.1)相似性最高(96%)。系统发育分析表明,肉蘑与C.rutilus、嘎蘑与L.akahatsu遗传关系最近,遗传距离均为0,与松蘑遗传关系最近的物种为S.granulatus,但遗传距离较远,为0.033。综合分析,秦皇岛地区肉蘑分子鉴定为色钉菇(C.rutilus),嘎蘑为浅橙红乳菇(L.akahatsu),松蘑为牛肝菌属(Suillus)的一种真菌。Abstract: In order to lay a foundation for the rational development and artificial domestication of wild rou mushroom,ga mushroom and song mushroom in Qinhuangdao area,the ITS regions of rDNA genes were amplified using ITS1 and TIS4 as primers,cloned and sequenced.ITS sequences were analyzed via NCBI blast program,meanwhile phylogenetic tree were constructed,respectively,in order to provide a foundation for the rational development and artificial domestication of the three wild edible mushrooms.The results showed that rou mushroom had 99% similarity with Chroogompus rutilus(MG457851.1),the similarity between ga mushroom and Lactarius akahatsu(EF685045.1)was up to 100%,but song mushroom merely had 96% similarity with Suillus granulatus(MF421107.1).Phylogenetic analysis showed that there was a close genetic relationship between rou mushroom and C.rutilus,their genetic distance reached to 0.Ga mushroom and L.akahatsualso had higher relationship,the genetic distance between them was 0.Song mushroom had a lower genetic relationship to Suillus granulatus(0.033).Therefore,rou mushroom and ga mushroom in Qinhuangdao area were at the molecular level identified as C.rutilus and L.akahatsu,respectively.Song mushroom,which was another kind of wild edible fungi in Qinhuangdao area,belonged to Suillus.