Data from: Phylogenomic insights into Adenophora and its allies (Campanulaceae): Revisiting generic delimitation and hybridization dynamics

Hybridization and introgression have long obscured relationships within
Adenophora 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 TB of DGS data from
165 samples—representing 48 species and 13 subspecies
of Adenophora (out of ca. 72 species) plus 24 outgroup
species—yielded 1,506 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.
Adenophora is expanded to include Campanula delavayi and the Korean
Peninsula endemic genus Hanabusaya. We also recommend reinstating Hyssaria
as a distinct Central Asian genus and introducing two new genera,
Boreoasia and Rosomala.