Lin Xiao-Hua, Xie Si-Yu, Ma Dai-Kun, Liao Shuai, Ge Bin-Jie, Zhou Shi-Liang, Zhao Liang, Xu Chao, Hong De-Yuan, Liu Bin-Bin
Key Laboratory of Systematic and Evolutionary Botany/State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
China National Botanical Garden, Beijing 100093, China.
Plant Divers. 2025 May 27;47(4):576-592. doi: 10.1016/j.pld.2025.05.010. eCollection 2025 Jul.
Hybridization and introgression have long obscured relationships within and its relatives, complicating generic delimitation. Leveraging deep genome skimming (DGS) data, we generated a large dataset, including thousands of single-copy nuclear (SCN) genes and plastomes, to untangle this reticulate history. Specifically, 9.89 terabytes (TB) of DGS data from 165 samples-representing 48 species and 13 subspecies of (out of 72 species) plus 24 outgroup species-yielded 1506 SCN genes and 77 plastid coding sequences. Tree-like phylogenies inferred with both coalescent- and concatenation-based methods revealed pronounced gene tree heterogeneity. Subsequent analysis showed that incomplete lineage sorting contributed minimally to this discordance; instead, hybridization and introgression were the primary drivers of early diversification. Integrating phylogenomic, morphological, and geographic evidence, we propose a revised generic framework for this group. is expanded to include and the Korean Peninsula endemic genus . We also recommend reinstating as a distinct Central Asian genus and introducing two new genera, and .
杂交和基因渗入长期以来模糊了[该属名称]及其近缘属之间的关系，使属的界定变得复杂。利用深度基因组浅层测序（DGS）数据，我们生成了一个大型数据集，包括数千个单拷贝核（SCN）基因和质体基因组，以理清这段网状演化历史。具体而言，来自165个样本（代表[该属名称]72个物种中的48个物种和13个亚种）以及24个外类群物种的9.89太字节（TB）的DGS数据产生了1506个SCN基因和77个质体编码序列。用基于溯祖法和串联法推断的树状系统发育显示出明显的基因树异质性。随后的分析表明，不完全谱系分选对这种不一致的贡献最小；相反，杂交和基因渗入是早期多样化的主要驱动因素。综合系统发育基因组学、形态学和地理证据，我们为该类群提出了一个修订后的属框架。[该属名称]扩大到包括[另一属名称]和朝鲜半岛特有属[又一属名称]。我们还建议恢复[某属名称]作为一个独特的中亚属，并引入两个新属，[新属一名称]和[新属二名称]。
