缙云黄芩(Scutellaria tsinyunensis C.Y.Wu et S.Chow.)隶属于唇形科(Labiatae)黄芩亚科(Scutellarioideae Briq.)黄芩属(Scutellaria Linn.),为多年生草本,缙云山特有种。缙云黄芩仅存的9个小居群呈片断化的“岛屿”状分布,且生境单一、居群面积及个体数量锐减、生存状况极度堪忧。最新评估结果显示,缙云黄芩濒危等级为极危(CR),因此对缙云黄芩进行保护迫在眉睫。国家林业局已将其列为重庆市8大极小种群物种之一进行保护,重庆市人民政府也在2015年将其列入重庆市重点保护野生植物名录进行保护。论文基于nrDNA ITS序列和cpDNA(psbA-trnH、trn L-F)序列,初步分析了缙云黄芩群体遗传多样性、遗传结构、缙云黄芩的系统地位以及与黄芩属其他物种间是否存在基因交流现象的发生,试图从分子角度揭示其濒危机制与进化方式,确定优先保护居群,进而提出更为科学全面地保护策略。研究结果如下:1基于ITS序列分析,缙云黄芩含有9种单倍型,单倍型网络图呈现辐射状,Hap1单倍型位于中心,为最原始的单倍型,揭示缙云黄芩是由少数个体或者居群扩张后...
【英文摘要】
Scutellaria tsinyunensis C. Y. Wu et S. Chow belonges to Labiatae, Scutellarioideae Briq., genus Scutellaria Linn., which is the perennial herbs and the endemic species of Jinyun Mountain.The remaining 9 small populations were fragmented as island distribution,habitat single, population size and the number of individuals dropped markedly, the survival situation is extremely worrying.It has showed that S. sinyunensis should be critically endangered(CR)according to the latest assessment, so that it is imminen...