Re-assessment of subspecific taxa in Astragalus section Anthylloidei (Fabaceae) based on molecular evidence

Progress in Biological Sciences Pub Date : 2014-12-01 DOI:10.22059/PBS.2014.52301

K. N. Safar, S. K. Osaloo, A. Maasoumi

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引用次数: 4

Abstract

The taxonomic and phylogenetic status of several taxa previously recognized as subspecies in Astragalus sect. Anthylloidei is re-assessed based on DNA sequences and morphological features. We focused on Astragalus ebenoides (subsp. ebenoides and subsp. naghadehensis), Astragalus murinus (subsp. murins and subsp. bornmuelleri), Astragalus remotiflorus (subsp. remotiflorus and subsp. melanogramma), Astragalus nigrohirsutus (=Astragalus remotiflorus subsp. nigrohirsutus), Astragalus submitis (=Astragalus submitis subsp. submitis) and Astragalus yushensis (=Astragalus submitis subsp. maassoumii). A total of 15 accessions representing 14 ingroups and one outgroup were analysed for nrDNA ITS and plastid DNA, rpl32 gene and rpl32-trnL(UAG) intergenic spacer. Phylogenetic trees were constructed using neighbour joining, Bayesian and maximum parsimony methods. The phylogenetic analyses of both datasets revealed that the subspecies described formerly under each of the studied species are distinct and should be elevated to specific rank. The nucleotide sequence variations observed among different subspecies, along with morphological characters, provided appropriate criteria in setting the species boundaries. The new combinations and a diagnostic key to the studied species are provided.

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基于分子证据的黄芪科花楸属亚特异分类群的再评价

基于DNA序列和形态特征，对黄芪科几个亚种的分类和系统发育状况进行了重新评价。我们重点研究了黄芪(黄芪亚属)。桔梗属及其亚属。黄芪(黄芪亚科);Murins和subsp。黄芪(黄芪亚科);远花和亚属。黑毛黄芪(=黄芪亚群);黄芪(=黄芪subsp.);黄芪(=黄芪subsp.);maassoumii)。对15份材料进行nrDNA ITS和质体DNA、rpl32基因和rpl32- trnl (UAG)基因间间隔序列分析，共14个内群和1个外群。采用邻居连接法、贝叶斯法和最大简约法构建系统发育树。两个数据集的系统发育分析表明，以前在每个研究物种下描述的亚种是不同的，应该提升到特定的等级。不同亚种间核苷酸序列的差异以及形态特征为确定种界提供了合适的标准。提供了新的组合和对所研究物种的诊断关键。

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Progress in Biological Sciences

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