Parallel evolution of phenological isolation across the speciation continuum in serpentine-adapted annual wildflowers.

ABSTRACT: Understanding the relative importance of reproductive isolating mechanisms across the speciation continuum remains an outstanding challenge in evolutionary biology. Here, we examine a common isolating mechanism, reproductive phenology, between plant sister taxa at different stages of adaptive divergence to gain insight into its relative importance during speciation. We study 17 plant taxa that have independently adapted to inhospitable serpentine soils, and contrast each with a nonserpentine sister taxon to form pairs at either ecotypic or species-level divergence. We use greenhouse-based reciprocal transplants in field soils to quantify how often flowering time (FT) shifts accompany serpentine adaptation, when FT shifts evolve during speciation, and the genetic versus plastic basis of the

SUBMITTER: Sianta SA 

PROVIDER: S-EPMC8059516 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature