| Title: | Behavioral evidence for fruit odor discrimination and sympatric host races of Rhagoletis pomonella flies in the Western United States |
| Author(s): | Linn CE; Yee WL; Sim SB; Cha DH; Powell TH; Goughnour RB; Feder JL; |
| Address: | "Department of Entomology, NYS Agricultural Experiment Station, Cornell University, 630 W North Street, Geneva, NY 14456, USA" |
| DOI: | 10.1111/j.1558-5646.2012.01719.x |
| ISSN/ISBN: | 1558-5646 (Electronic) 0014-3820 (Linking) |
| Abstract: | "The recent shift of Rhagoletis pomonella (Diptera: Tephritidae) from its native host downy hawthorn, Crataegus mollis, to introduced domesticated apple, Malus domestica, in the eastern United States is a model for sympatric host race formation. However, the fly is also present in the western United States, where it may have been introduced via infested apples within the last 60 years. In addition to apple, R. pomonella also infests two hawthorns in the West, one the native black hawthorn, C. douglasii, and the other the introduced English ornamental hawthorn, C. monogyna. Here, we test for behavioral evidence of host races in the western United States. through flight tunnel assays of western R. pomonella flies to host fruit volatile blends. We report that western apple, black hawthorn, and ornamental hawthorn flies showed significantly increased levels of upwind-directed flight to their respective natal compared to nonnatal fruit volatile blends, consistent with host race status. We discuss the implications of the behavioral results for the origin(s) of western R. pomonella, including the possibility that western apple flies were not introduced, but may represent a recent shift from local hawthorn fly populations" |
| Keywords: | "Animals *Behavior, Animal Crataegus/*chemistry Discrimination, Psychological Fruit/chemistry Genetic Speciation Malus/*chemistry Odorants Olfactory Perception Species Specificity Sympatry Tephritidae/genetics/*physiology United States Volatile Organic Com;" |
| Notes: | "MedlineLinn, Charles E Jr Yee, Wee L Sim, Sheina B Cha, Dong H Powell, Thomas H Q Goughnour, Robert B Feder, Jeffrey L eng 2012/10/31 Evolution. 2012 Nov; 66(11):3632-41. doi: 10.1111/j.1558-5646.2012.01719.x. Epub 2012 Aug 10" |
