Asset Details
Do you wish to reserve the book?
Adaptive radiation of the Callicarpa genus in the Bonin Islands revealed through double‐digest restriction site‐associated DNA sequencing analysis
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Adaptive radiation of the Callicarpa genus in the Bonin Islands revealed through double‐digest restriction site‐associated DNA sequencing analysis
Do you wish to request the book?
Adaptive radiation of the Callicarpa genus in the Bonin Islands revealed through double‐digest restriction site‐associated DNA sequencing analysis
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Adaptive radiation of the Callicarpa genus in the Bonin Islands revealed through double‐digest restriction site‐associated DNA sequencing analysis
2024
Overview
The Bonin Islands, comprised of the Mukojima, Chichijima, and Hahajima Islands, are known for their isolated and distinctive habitats, hosting a diverse array of endemic flora and fauna. In these islands, adaptive radiation has played a remarkable role in speciation, particularly evident in the Callicarpa genus that is represented by three species: Callicarpa parvifolia and C. glabra exclusive to the Chichijima Islands, and Callicarpa subpubescens, distributed across the entire Bonin Islands. Notably, C. subpubescens exhibits multiple ecotypes, differing in leaf hair density, flowering time, and tree size. In this study, we aimed to investigate species and ecotype diversification patterns, estimate divergence times, and explore cryptic species within Callicarpa in the Bonin Islands using phenotypic and genetic data (double‐digest restriction site‐associated DNA sequencing). Genetic analysis revealed that C. parvifolia and C. glabra both formed single, distinct genetic groups. Conversely, C. subpubescens consisted of six genetic groups corresponding to different ecotypes and regions, and a hybrid group resulting from the hybridization between two of these genetic groups. Population demography analysis focusing on six Chichijima and Hahajima Islands‐based species/ecotypes indicated that all species and ecotypes except one ecotype diverged simultaneously around 73–77 kya. The star‐shaped neighbor‐net tree also suggests the simultaneous divergence of species and ecotypes. The species and ecotypes that simultaneously diverged adapted to dry environments and understory forests, suggesting that aridification may have contributed to this process of adaptive radiation. Moreover, leaf morphology, flowering time, and genetic analyses suggested the presence of two cryptic species and one hybrid species within C. subpubescens. This study investigated the keystone endemic tree genus Callicarpa in the Bonin Islands, revealing two cryptic species and one hybrid species based on phenotypic, genotypic, and phylogenetic patterns. It provides evidence of simultaneous divergence of multiple species and ecotypes, offering definitive evidence of adaptive radiation and suggesting a link to global environmental changes.
