Favorable epistasis in ancestral diterpene synthases promoted convergent evolution of a resin acid precursor in conifers

Proceedings of the National Academy of Sciences, Volume 122, Issue 39, September 2025. <br/>SignificanceThe repeated evolution of a trait through different mutations in different species is called convergent evolution, but the causes of such repeatability are rarely understood. As an example of convergence, conifers from the related generaPicea,…