Large-scale mutation in the evolution of a gene complex for cryptic coloration

Villoutreix, Romain; de Carvalho, Clarissa F.; Soria-Carrasco, Víctor; Lindtke, Dorothea; De-la-Mora, Marisol; Muschick, Moritz; Feder, Jeffrey L.; Parchman, Thomas L.; Gompert, Zach; Nosil, Patrik (2020). Large-scale mutation in the evolution of a gene complex for cryptic coloration. Science, 369(6502), pp. 460-466. American Association for the Advancement of Science 10.1126/science.aaz4351

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The types of mutations affecting adaptation in the wild are only beginning to be understood. In particular, whether structural changes shape adaptation by suppressing recombination or by creating new mutations is unresolved. Here, we show that multiple linked but recombining loci underlie cryptic color morphs of Timema chumash stick insects. In a related species, these loci are found in a region of suppressed recombination, forming a supergene. However, in seven species of Timema, we found that a megabase-size “supermutation” has deleted color loci in green morphs. Moreover, we found that balancing selection likely contributes more to maintaining this mutation than does introgression. Our results show how suppressed recombination and large-scale mutation can help to package gene complexes into discrete units of diversity such as morphs, ecotypes, or species.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Lindtke, Dorothea and Muschick, Moritz

Subjects:

500 Science > 580 Plants (Botany)
500 Science > 570 Life sciences; biology

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

04 Aug 2020 11:16

Last Modified:

09 Aug 2020 02:43

Publisher DOI:

10.1126/science.aaz4351

PubMed ID:

32703880

BORIS DOI:

10.7892/boris.145557

URI:

https://boris.unibe.ch/id/eprint/145557

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