Sierra Nevada Aquatic Research Laboratory

02 Sep, 07 AM - 06 Sep, 03 AM

The distribution of adaptations across species geographic ranges, and the extent to which gene flow correlates with, and affects, these distributions is largely unknown. This project seeks to understand the role of gene flow and selection in phenotype diversification across the species range as well as population-specific potentials for climate adaptation. Mimulus laciniatus, a Sierran annual plant with a restricted, well-defined range, is used here as a model species. Replicate populations across a strong elevation gradient will be sown in common gardens approximating the breadth of the species range to reveal heritable, population-based, climate adaptation and phenotypic plasticity. Neutral among- and within-population microsatellite marker variation will be used to estimate historical isolation, divergence, and diversity across the species range. A statistical model will be used to test for the effect of isolation, and its interactive effects, on quantitative trait divergence. Finally, edge populations will be crossed with central ones to understand the role of successful, contemporary gene flow on fitness and genetic variation in edge environments. Understanding adaptation in the context of gene flow is crucial for estimating historical adaptation and the potential for future adaptive climate responses.

Visit #13438 @Sierra Nevada Aquatic Research Laboratory

Approved

Under Project # 8779 | Research

Mimulus laciniatus Project

faculty - University of California, Merced

Reservation Members(s)

Jason Sexton Sep 2 - 6, 2007 (5 days)
Group of 3 Other Sep 2 - 6, 2007 (5 days)

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Dorm 4 Sep 2 - 6, 2007