Pollinator-mediated selection on floral morphology: evidence for transgressive evolution in a derived hybrid lineage.

Abstract excerpt

Hybridization between closely related lineages is a mechanism that might promote substantive changes in phenotypic traits of descendants, resulting in transgressive evolution. Interbreeding between divergent but morphologically similar lineages can produce exceptional phenotypes, but the potential for transgressive variation to facilitate long-term trait changes in derived hybrid lineages has received little...

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