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Polyploidy Impacts Population Growth and Competition with Diploids: Multigenerational Experiments Reveal Key Life‐history Trade‐offs by Thomas J. Anneberg; Elizabeth M. O'Neill; Tia‐Lynn Ashman; Martin M. Turcotte is a Agricultural and Biological Sciences article available to read on EtoBox.

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Ecological theory predicts that early generation polyploids ('neopolyploids') should quickly go extinct owing to the disadvantages of rarity and competition with their diploid progenitors. However, polyploids persist in natural habitats globally. This paradox has been addressed theoretically by recognizing that reproductive assurance of neopolyploids and niche differentiation can promote establishment. Despite this, the direct effects of polyploidy at the population level remain largely untested despite establishment being an intrinsically population-level process. We conducted population-level experiments where life-history investment in current and future growth was tracked in four lineage pairs of diploids and synthetic autotetraploids of the aquatic plant Spirodela polyrhiza. Population growth was evaluated with and without competition between diploids and neopolyploids across a range of nutrient treatments. Although neopolyploid populations produce more biomass, they reach lower population sizes and have reduced carrying capacities when growing alone or in competition across all nutrient treatments. Thus, contrary to individual-level studies, our population-level data suggest

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Author

Thomas J. Anneberg; Elizabeth M. O'Neill; Tia‐Lynn Ashman; Martin M. Turcotte

Publisher

Wiley

Published

2023

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)