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草原毒草白喉乌头的遗传多样性与遗传结构研究
Authors
张宏祥
张明理
Publication date
1 January 2016
Publisher
Doi
Cite
Abstract
通过测定采自天山和阿尔泰山草原的17个白喉乌头居群的叶绿体DNA片段序列,调查了其遗传多样性和空间遗传结构,并计算出每个居群的遗传多样性;运用分子变异方差(AMOVA)分析计算发生在居群内和居群间的遗传变异比例;利用错配分析来检验该物种是否发生了历史居群扩张;最后,基于最大熵方法模拟其物种在不同时期的分布区。结果表明:白喉乌头具有较低水平的遗传多样性(单倍型多样性±SD=0.343 7±0.048 8),所有居群均共享一个单倍型;遗传变异大致均等分布于居群间和局群内(58.25%vs.41.75%);两个不同谱系的分化发生在第四纪冰期(1.816~2.280百万年以前)末次盛冰期时期,该物种的避难所存在于天山西部,而在未来气候变化条件下其分布区不会发生变化。研究认为白喉乌头这种空间遗传结构与其克隆繁殖、长的生活周期、异交繁殖等生活史特征,以及第四纪气候变化影响相关
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of Botany,Chinese Academy Of Sciences
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Last time updated on 27/10/2022