Divergence in hormone signalling links local adaptation and hybrid failure
Melanie J Wilkinson,
Greg M. Walter,
Maddie E. James,
Scott L Allen,
Diana M. Bernal,
Henry L. North,
Christine A. Beveridge,
Posted 17 Nov 2019
bioRxiv DOI: 10.1101/845354
Posted 17 Nov 2019
Natural selection is a major driver for the origins of adaptations and new species. Whether or not the processes driving adaptation and speciation share a molecular basis remains largely unknown. Here, we show that divergence in hormone signalling contributed to the evolution of complex adaptations and intrinsic reproductive isolation in the Australian wildflower Senecio lautus . We provide evidence that differences in the auxin pathway, a hormone required for plant growth and development, has led to the repeated evolution of erect and prostrate forms along the Australian coast. Using multiple hybrid and natural populations, we show that adjacent erect and prostrate populations repeatedly diverged in auxin-related genes and auxin-dependent phenotypes, such as gravitropism. Analysis of a multi-year field selection experiment revealed that variation in fitness of an F10 hybrid population explained variation in gravitropism of their offspring. Genotyping of F11 hybrid individuals with extreme values of gravitropism revealed that variation in some of the most divergent genes explained both 65% of the variation in gravitropism and their probability of producing seed. Together, our results suggest that divergence in hormonal pathways can create a genetic link between rapid adaptation to new environments and the evolution of intrinsic reproductive isolation. : #ref-1 : #ref-2
- Downloaded 288 times
- Download rankings, all-time:
- Site-wide: 46,230 out of 78,238
- In evolutionary biology: 3,263 out of 4,974
- Year to date:
- Site-wide: 22,601 out of 78,238
- Since beginning of last month:
- Site-wide: 19,469 out of 78,238
Downloads over time
Distribution of downloads per paper, site-wide
- 18 Dec 2019: We're pleased to announce PanLingua, a new tool that enables you to search for machine-translated bioRxiv preprints using more than 100 different languages.
- 21 May 2019: PLOS Biology has published a community page about Rxivist.org and its design.
- 10 May 2019: The paper analyzing the Rxivist dataset has been published at eLife.
- 1 Mar 2019: We now have summary statistics about bioRxiv downloads and submissions.
- 8 Feb 2019: Data from Altmetric is now available on the Rxivist details page for every preprint. Look for the "donut" under the download metrics.
- 30 Jan 2019: preLights has featured the Rxivist preprint and written about our findings.
- 22 Jan 2019: Nature just published an article about Rxivist and our data.
- 13 Jan 2019: The Rxivist preprint is live!