Research Mentor(s)

Dietmar Schwarz

Affiliated Department

Biology

Sort Order

61

Start Date

20-5-2016 12:00 PM

End Date

20-5-2016 3:00 PM

Keywords

adaptive variation, snowberry fly, snowberries, introgression, Washington state, desiccation resistance

Abstract

Local adaptation to environmental gradients can be an important source of variation that allows populations to evolve in response to environmental challenges. The snowberry maggot fly (Rhagoletis zephyria) is found throughout the different climate regions of Washington state. However, populations vary in their resistance to desiccation as an early pupa. We found that in low humidity treatments, desiccation resistance is predicted by annual precipitation and elevation and is tightly correlated with fly emergence the following season. Our results suggest that the variation in desiccation resistance in of R. zephyria is adaptive. Rhagoletis zephyria hybridizes with the agriculturally important invasive apple maggot, R. pomonella, and introgressing drought-adapted alleles may make this pest a better invader of Washington’s arid apple growing regions.

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May 20th, 12:00 PM May 20th, 3:00 PM

Variation in desiccation resistance between different Rhagoletis zephyria populations spanning the Cascade Mountains

Biology

Local adaptation to environmental gradients can be an important source of variation that allows populations to evolve in response to environmental challenges. The snowberry maggot fly (Rhagoletis zephyria) is found throughout the different climate regions of Washington state. However, populations vary in their resistance to desiccation as an early pupa. We found that in low humidity treatments, desiccation resistance is predicted by annual precipitation and elevation and is tightly correlated with fly emergence the following season. Our results suggest that the variation in desiccation resistance in of R. zephyria is adaptive. Rhagoletis zephyria hybridizes with the agriculturally important invasive apple maggot, R. pomonella, and introgressing drought-adapted alleles may make this pest a better invader of Washington’s arid apple growing regions.

 

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