基于芸香科的植物通用DNA条形码研究

被引:140
作者
罗焜 [1 ,2 ]
陈士林 [1 ]
陈科力 [2 ]
宋经元 [1 ]
姚辉 [1 ]
马新业 [1 ]
朱英杰 [3 ]
庞晓慧 [1 ]
余华 [1 ]
李西文 [1 ,4 ]
刘震 [2 ]
机构
[1] 中国医学科学院北京协和医学院药用植物研究所
[2] 湖北中医学院药学院
[3] 西南交通大学生命科学与工程学院
[4] 清华大学化学系
关键词
DNA条形码; ITS2; 芸香科; 鉴定;
D O I
暂无
中图分类号
Q943 [植物细胞遗传学];
学科分类号
071007 [遗传学];
摘要
植物DNA条形码研究是近10年来进展最迅速的学科之一,其通用序列的筛选一直是该领域研究的热点问题.2009年,生命条形码联盟植物工作组推荐rbcL+matK组成复合序列作为植物通用条形码,但其研究对象中近缘属、种较少,且物种水平鉴定成功率仅为72%,所以仍在进行验证和新序列的研究工作.本研究选取nrDNAITS2序列,利用其具有Ⅱ级结构的特性、通过不同物种类型模型判定全长,将其和目前热点候选序列(matK,rbcL,psbA-trnH,rpoC1,ycf5)及nrDNAITS序列针对芸香科72属192种300个样本进行比较,试图在同一科属下更多近缘种存在时,真实判定候选序列的鉴定能力.结果表明,自行设计引物的ITS2序列具有较好的PCR扩增和测序成功率,在所考察的候选序列中具有最大的种间变异和较小的种内变异,且两者存在极显著差异,同时物种鉴定成功率最高,各评价指标均优于其他候选序列.证实ITS2序列在单一科属内的"高效性",故推荐其作为植物DNA条形码通用序列之一.
引用
收藏
页码:342 / 358
页数:17
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