Hybrid evolution repeats itself across environmental contexts in Texas sunflowers (Helianthus)

Nora Mitchell, Hoang Luu, Gregory Owens, Loren Rieseberg & Kenneth Whitney
To what extent is evolution repeatable? Little is known about whether the evolution of hybrids is more (or less) repeatable than non-hybrids. We used field experimental evolution in annual sunflowers (Helianthus) in Texas to ask the extent to which hybrid evolution is repeatable across environments compared to non-hybrid controls. We created hybrids between Helianthus annuus (L.) and H. debilis (Nutt.) and grew plots of both hybrids and non-hybrid controls through eight generations at three sites...
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