Reconstructing the phylogenetic history of species in large taxonomic groups remains a challenge despite ever increasing access to molecular data. In subfamily Cercidoideae (Leguminosae), the large pantropical Bauhinia s.l. (~380 spp.) is never supported as monophyletic, but the generic boundaries and the number of genera that should be recognised remains a challenging taxonomic and phylogenetic question. Here we reconstruct the phylogeny of Bauhinia s.l. and related genera in the subfamily using sequences obtained from five loci (matK, trnL‐F, Leafy, and two previously undetected duplicate copies of Legcyc), which we analyse individually and in a concatenated matrix (excluding Leafy). The individual and concatenated analyses generally support two distinct lineages in Bauhinia s.l.: (1) the Bauhinia clade, containing Bauhinia s.str., Brenierea, and Piliostigma; and (2) the Phanera clade, containing Barklya, Cheniella, Gigasiphon, Lasiobema, Lysiphyllum, Phanera s.str., Schnella, and Tylosema. Based on our analyses, we recognise 14 genera in Cercidoideae. We resurrect the genus Tournaya from Gigasiphon, and synonymise the Asian segregate genus Lasiobema back into Phanera s.str. Our analyses reveal a clear gene duplication event in CYCLOIDEA that is shared by all Cercidoideae excluding the sister lineage to the subfamily, Cercis, supporting recent hypotheses for a whole genome duplication in all Cercidoideae except this genus.

中文翻译：

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测试猴头亚科（豆科）的通用限制：来自质体和重复的核基因序列的见解

尽管越来越多地获得分子数据，但是在大型分类学组中重建物种的系统进化史仍然是一个挑战。在蕨类亚科（Leguminosae）中，大的泛热带洋紫荆sl（〜380 spp。）从来没有被认为是单系统的，但是应认识到的一般界限和属数仍然是一个具有挑战性的分类学和系统发育问题。在这里，我们使用从五个基因座（matK，trnL-F，Leafy和两个以前未检测到的Legcyc重复副本）获得的序列，重建了亚紫荆属属及其相关属的系统发育史，我们对其进行了单独分析，并在连接的矩阵中进行了分析（不包括绿叶）。个体分析和串联分析通常支持紫荆花sl中的两个不同谱系：（1）紫荆花枝，包含紫荆花s.str。，Brenierea和Piliostigma；（2）Phanera进化枝，包含Barklya，Cheniella，Gigasiphon，Lasiobema，Lysiphyllum，Phanera s.str。，Schnella和Tylosema。根据我们的分析，我们识别出猕猴桃科的14个属。我们从吉加西蓬复活了图尔纳亚属，并将亚洲隔离种Lasiobema变回Phanera s.str。我们的分析揭示了一个明确的基因复制事件CYCLOIDEA由所有Cercidoideae共享不含妹妹血统亚科，紫荆，支持最近假设在所有Cercidoideae除了这个属全基因组的复制。