A few genetic variants go a long way in differentiating Penstemon species.
Yaniv BrandvainShelley SiantaPublished in: PLoS biology (2023)
The integrity of hybridizing species is usually maintained by genome-wide selection or by selection on a few genomic regions. A study published in PLOS Biology finds a different pattern-60 SNPs spread across the genome differentiate a Penstemon species pair.