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Discussion: Franks et al. (2007)
Discussion: Franks et al. (2007)
After our in-class discussion, you should respond to at least two other student’s posts by Sunday, Mar 7, 2021.
Reference: Franks, S. J., S. Sim, and A. E. Weis. 2007. Rapid evolution of flowering time by an annual plant in response to a climate fluctuation. Proc. Natl. Acad. Sci. U. S. A. 104:1278–1282.
The experiment provided evidence that some species, like B. rapa, can have rapid adaptive evolutionary changes in response to a climatic fluctuation to increase their survival and fecundity. While other species, despite having sufficient genetic variance for an
evolutionary response, may still fail to adapt if abrupt environmental change depresses reproductive rates below replacement levels. What do you think are the possible factors that could have affected the selection intensity in B. rapa?
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