Researchers have assembled the first high-quality chromosome-level genomes for two critically endangered island oaks, Quercus bawanglingensis and Quercus pseudosetulosa. The study, led by Prof. Wang Baosheng at the South China Botanical Garden of the Chinese Academy of Sciences, was published in The Plant Journal.
These oaks inhabit the same island ecosystem yet have followed dramatically different evolutionary trajectories. Natural selection and demographic history have driven their genomes to diverge in structure and function, raising fundamental questions about how endangered species adapt under isolation.
The team sequenced both species to near-complete resolution, enabling precise comparisons between their genomes. Such detail is rare for non-model plants and provides a baseline for monitoring genetic diversity loss.
Conservation efforts now have a genetic roadmap. The findings could inform breeding programs and habitat management strategies tailored to each species' unique vulnerabilities. Without intervention, both face heightened extinction risk.
The work underscores that even closely related species on the same island can require distinct conservation approaches, a lesson with global implications for biodiversity protection.