Reproductive Isolation
Comparative genetics of reinforcement
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When hybrids have reduced fitness, natural selection will favor the evolution of traits that prevent the formation of hybrids (speciation via ‘reinforcement’).
We are evaluating the frequency of reinforcement selection by comparing the strength of reproductive barriers between sympatric (geographically overlapping) and allopatric (non-overlapping) populations, in multiple wild tomato species pairs. |
Molecular evolution of seed fertility genes
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| We are studying patterns of molecular evolution in genes that control embryonic development, to understand failure of embryogenesis in hybrids among wild Lycopersicon species. |
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Projects outside Lycopersicon
Hybrid sterility and soil adaptation
In collaboration with Dr. Jessica Wright (website), we are evaluating the early evolution of pollen and seed sterility between adjacent serpentine and non-serpentine adapted ecotypes of the native California wildflower, Collinsia sparsiflora.
Hybrid sterility in the genus Nolana
Working with Dr. Rosanna Freyre and Amy Douglas, we are examining patterns of reproductive divergence and isolation among phenotypically diverse Nolana species.
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