Pseudogenization and Resurrection of a Speciation Gene

Esfeld, Korinna; Berardi, Andrea E.; Moser, Michel; Bossolini, Eligio; Freitas, Loreta; Kuhlemeier, Cris (2018). Pseudogenization and Resurrection of a Speciation Gene. Current Biology, 28(23), 3776-3786.e7. Cell Press 10.1016/j.cub.2018.10.019

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A persistent question in evolutionary biology is how complex phenotypes evolve and whether phenotypic transitions are reversible. Multiple losses of floral pigmentation have been documented in the angiosperms, but color re-gain has not yet been described, supporting that re-gain is unlikely. Pollinator-mediated selection in Petunia has resulted in several color shifts comprised of both losses and gains of color. The R2R3-MYB transcription factor AN2 has been identified as a major locus responsible for shifts in pollinator preference. Whereas the loss of visible color has previously been attributed to repeated pseudogenization of AN2, here, we describe the mechanism of an independent re-gain of floral color via AN2 evolution. In P. secreta, purple color is restored through the improbable resurrection of AN2 gene function from a non-functional AN2-ancestor by a single reading-frame-restoring mutation. Thus, floral color evolution in Petunia is mechanistically dependent on AN2 functionality, highlighting its role as a hotspot in color transitions and a speciation gene for the genus.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Esfeld, Korinna; Berardi, Andrea Elise; Moser, Michel; Bossolini, Eligio and Kuhlemeier, Cris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0960-9822

Publisher:

Cell Press

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

11 Dec 2018 11:01

Last Modified:

13 Dec 2018 16:21

Publisher DOI:

10.1016/j.cub.2018.10.019

Uncontrolled Keywords:

evolution; trait reversal; Dollo’s law; pollination syndrome; anthocyanins; flavonols; Petunia; pseudogenegene resurrection

BORIS DOI:

10.7892/boris.121781

URI:

https://boris.unibe.ch/id/eprint/121781

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