Data from: Plant DNA barcodes and the influence of gene flow

Success of species assignment using DNA barcodes has been shown to vary among plant lineages due to a wide range of different factors. In this study, we confirm the theoretical prediction that gene flow influences species assignment with simulations and a literature survey. We show that the genome experiencing the highest gene flow is, in the majority of the cases, the best suited for species delimitation. Our results clearly suggest that, for most angiosperm groups, plastid markers will not be the most appropriate for use as DNA barcodes. We therefore advocate shifting the focus from plastid to nuclear markers to achieve an overall higher success using DNA barcodes.已有研究证实，基于DNA条形码（DNA barcode）的物种鉴定成功率因植物谱系而异，其影响因素广泛多样。本研究通过模拟实验与文献调研，验证了基因流（gene flow）会对物种鉴定产生影响这一理论预测。研究结果显示，在多数情况下，基因流水平最高的基因组最适用于物种界定（species delimitation）。本研究明确表明，对于大多数被子植物（angiosperm）类群，质体标记（plastid marker）并非最适合用作DNA条形码的分子标记。因此，我们倡议将研究重点从质体标记转向核标记（nuclear marker），以全面提升DNA条形码技术的应用成功率。