Plastome‐Based Phylogenomics Resolves Phylogenetic Complexity in Lysimachia and Reveals Unexpected Placement of L. thyrsiflora
- 1Department of Life Sciences Yeungnam University Gyeongsan Gyeongsangbuk‐do Republic of Korea
Abstract
The genus Lysimachia is taxonomically complex, especially in East Asia. We analyzed the complete chloroplast (cp) genomes of four Lysimachia species ( L . acroadenia , L. leucantha , L. thyrsiflora , and L. arvensis ). The cp genomes (153–155 kb) showed the typical quadripartite structure. Comparative analysis identified two highly variable regions, which are promising molecular markers. Most protein‐coding genes showed Ka/Ks ratios below 1, but rps 12 and psa I showed elevated Ka/Ks ratios that require further validation using codon‐based selection tests. The Maximum likelihood phylogenetic tree confirmed the monophyly of Lysimachia . Importantly, L. thyrsiflora clustered within subgenus Lysimachia section Lysimachia , contradicting its traditional classification and suggesting a complex biogeographic history, potentially involving historical connections across the Bering Land Bridge. Divergence time analysis estimated the genus origin at approximately 33 Mya. Our results clarify the phylogenetic status of key taxa and provide essential genomic resources for future evolutionary and taxonomic research on Lysimachia .
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BibTeX
@article{park2026plastomebased,
title = {{Plastome‐Based Phylogenomics Resolves Phylogenetic Complexity in Lysimachia and Reveals Unexpected Placement of L. thyrsiflora}},
author = {SeongJun Park and JeongYun Byeon and SeonJoo Park},
journal = {Ecology and Evolution},
year = {2026},
month = nov,
doi = {10.1002/ece3.74544},
url = {https://onlinelibrary.wiley.com/doi/10.1002/ece3.74544},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Plastome‐Based Phylogenomics Resolves Phylogenetic Complexity in Lysimachia and Reveals Unexpected Placement of L. thyrsiflora
AU - SeongJun Park
AU - JeongYun Byeon
AU - SeonJoo Park
PY - 2026
DA - 2026/11/04
JO - Ecology and Evolution
DO - 10.1002/ece3.74544
UR - https://onlinelibrary.wiley.com/doi/10.1002/ece3.74544
AB - The genus Lysimachia is taxonomically complex, especially in East Asia. We analyzed the complete chloroplast (cp) genomes of four Lysimachia species ( L . acroadenia , L. leucantha , L. thyrsiflora , and L. arvensis ). The cp genomes (153–155 kb) showed the typical quadripartite structure. Comparative analysis identified two highly variable regions, which are promising molecular markers. Most protein‐coding genes showed Ka/Ks ratios below 1, but rps 12 and psa I showed elevated Ka/Ks ratios that require further validation using codon‐based selection tests. The Maximum likelihood phylogenetic tree confirmed the monophyly of Lysimachia . Importantly, L. thyrsiflora clustered within subgenus Lysimachia section Lysimachia , contradicting its traditional classification and suggesting a complex biogeographic history, potentially involving historical connections across the Bering Land Bridge. Divergence time analysis estimated the genus origin at approximately 33 Mya. Our results clarify the phylogenetic status of key taxa and provide essential genomic resources for future evolutionary and taxonomic research on Lysimachia .
SN - 2045-7758
SN - 2045-7758
ER -