The abstract is read at the publisher; the summary is JClub's.
Genome-wide data from 52 Dudleya abramsii ssp. setchellii individuals show strong isolation by distance, with genetic differentiation increasing predictably with geographic separation.
- Why it matters: Gene flow can shape genetic variation in rare, geographically restricted plants, but the relative roles of pollen, seed movement, and isolation are unclear for this endangered serpentine endemic.
- What they did: Using low-coverage whole-genome resequencing across 13 D. a. ssp. setchellii populations plus adjacent D. cymosa and other D. abramsii subspecies, they tested clonality, isolation by distance, PCA/phylogeny, and combined field pollinator observations with a controlled seed dispersal experiment.
- The result: Clonal reproduction occurred only at centimeter-scale spacing and a putative D. cymosa hybrid was detected; bumblebees were dominant floral visitors, while most seeds moved only a few meters, supporting limited dispersal as a contributor to spatial genetic structure.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.