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干旱半干旱地区蓼科4属植物的系统发育关系研究

, PP. 849-853

Keywords: 蓼科,叶绿体基因,atpB-rbcL,系统发育,干旱区

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Abstract:

提取蓼科木蓼属(Atraphaxis)、沙拐枣属(Calligonum)、翅果蓼属(Parapteropyrum)和双翅果蓼属(Pteropyrum)蓼科4属植物的总DNA,通过聚合酶链式反应(PCR),扩增其叶绿体基因片段atpB-rbcL。atpB-rbcL基因间区长约900bp,已被广泛应用于属间系统发育关系的研究。运用PAUP和Bayesian软件,通过最大简约法、最大似然法和贝叶斯分析,建立系统发育树结果显示4属中沙拐枣属和双翅果蓼属存在最近亲缘关系;而特产于中国西藏的翅果蓼属和其他3属关系较远;另外,沙拐枣属下4个组中基翅组、刺果组和翅果组聚于一小进化枝下,与泡果组相区别。

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