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Research article2023Peer reviewedOpen access

Evolvability and trait function predict phenotypic divergence of plant populations

Opedal, Oystein H.; Armbruster, W. Scott; Hansen, Thomas F.; Holstad, Agnes; Pelabon, Christophe; Andersson, Stefan; Campbell, Diane R.; Caruso, Christina M.; Delph, Lynda F.; Eckert, Christopher G.; Lankinen, Asa; Walter, Greg M.; Agren, Jon; Bolstad, Geir H.

Abstract

Understanding the causes and limits of population divergence in phenotypic traits is a fundamental aim of evolutionary biology, with the potential to yield predictions of adaptation to environmental change. Reciprocal transplant experiments and the evaluation of optimality models suggest that local adaptation is common but not universal, and some studies suggest that trait divergence is highly constrained by genetic variances and covariances of complex phenotypes. We analyze a large database of population divergence in plants and evaluate whether evolutionary divergence scales positively with standing genetic variation within populations (evolvability), as expected if genetic constraints are evolutionarily important. We further evaluate differences in divergence and evolvability-divergence relationships between reproductive and vegetative traits and between selling, mixed-mating, and outcrossing species, as these factors are expected to influence both patterns of selection and evolutionary potentials. Evolutionary divergence scaled positively with evolvability. Furthermore, trait divergence was greater for vegetative traits than for floral (reproductive) traits, but largely independent of the mating system. Jointly, these factors explained similar to 40% of the variance in evolutionary divergence. The consistency of the evolvability-divergence relationships across diverse species suggests substantial predictability of trait divergence. The results are also consistent with genetic constraints playing a role in evolutionary divergence.

Keywords

adaptation; evolvability; genetic constraints; macroevolution

Published in

Proceedings of the National Academy of Sciences of the United States of America
2023, Volume: 120, number: 1, article number: e2203228120Publisher: National Academy of Sciences

    UKÄ Subject classification

    Genetics
    Evolutionary Biology

    Publication identifier

    DOI: https://doi.org/10.1073/pnas.2203228120

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/129480