TY - JOUR T1 - Is specialization a dead end?: phylogeny of host use in Dendroctonus (Scolytidae: Coleoptera). JF - Evolution Y1 - 1998 A1 - Kelley, S. T. A1 - Farrell, B. D. SP - 1731 EP - 1743 VL - 52 N1 - ORIG-Title-Journal-Volume-Combination: Is specialization a dead end?: phylogeny of host use in Dendroctonus (Scolytidae: Coleoptera). Evolution 52 ER - TY - JOUR T1 - REPEATED EVOLUTION OF CROP THEFT IN FUNGUS-FARMING AMBROSIA BEETLES JF - Evolution Y1 - 2010 A1 - Hulcr, Jiri A1 - Cognato, Anthony I. SP - 3205 EP - 3212 KW - Xyleborini AB - Ambrosia beetles, dominant wood degraders in the tropics, create tunnels in dead trees and employ gardens of symbiotic fungi to extract nutrients from wood. Specificity of the beetle-fungus relationship has rarely been examined, and simple vertical transmission of a specific fungal cultivar by each beetle species is often assumed in literature. We report repeated evolution of fungal crop stealing, termed mycocleptism, among ambrosia beetles. The mycocleptic species seek brood galleries of other species, and exploit their established fungal gardens by tunneling through the ambient mycelium-laden wood. Instead of carrying their own fungal sybmbionts, mycocleptae depend on adopting the fungal assemblages of their host species, as shown by an analysis of fungal DNA from beetle galleries. The evidence for widespread horizontal exchange of fungi between beetles challenges the traditional concept of ambrosia fungi as species-specific symbionts. Fungus stealing appears to be an evolutionarily successful strategy. It evolved independently in several beetle clades, two of which have radiated, and at least one case was accompanied by a loss of the beetles' fungus-transporting organs. We demonstrate this using the first robust phylogeny of one of the world's largest group of ambrosia beetles, Xyleborini. VL - 64 SN - 0014-3820 ER - TY - JOUR T1 - Adaptive dynamics of dormancy duration variability: evolutionary trade-off and priority effect lead to suboptimal adaptation JF - Evolution Y1 - 2009 A1 - Gourbiere, Sebastien A1 - Menu, Frederic SP - 1879 EP - 1892 AB - Many plants, insects, and crustaceans show within-population variability in dormancy length. The question of whether such variability corresponds to a genetic polymorphism of pure strategies or a mixed bet-hedging strategy, and how the level of phenotypic variability can evolve remain unknown for most species. Using an eco-genetic model rooted in a 25-year ecological field study of a Chestnut weevil, Curculio elephas, we show that its diapause-duration variability is more likely to have evolved by the spread of a bet-hedging strategy than by the establishment of a genetic polymorphism. Investigating further the adaptive dynamics of diapause-duration variability, we find two unanticipated patterns of general interest. First, there is a trade-off between the ability of bet-hedging strategies to persist on an ecological time scale and their ability to invade. The optimal strategy (in terms of persistence) cannot invade, whereas suboptimal bet-hedgers are good invaders. Second, we describe an original evolutionary dynamics where each bet-hedging strategy (defined by its rate of prolonged diapause) resists invasion by all others, so that the first type of bet-hedger to appear persists on an evolutionary time scale. Such "evolutionary priority effect" could drive the evolution of maladapted levels of diapause-duration variability. VL - 63 SN - 0014-3820 ER - TY - JOUR T1 - Evolutionary rates in the adaptive radiation of beetles on plants JF - Evolution Y1 - 2004 A1 - Farrell, B. D. A1 - Sequeira, A. S. SP - 1984 EP - 2001 VL - 58 UR - http://insects.oeb.harvard.edu/farrell_lab/people/farrell/papers/Farrell&Seq2004.pdf ER - TY - JOUR T1 - The evolution of agriculture in beetles (Curculionidae: Scolytinae and Platypodinae) JF - Evolution Y1 - 2001 A1 - Farrell, B. D. A1 - Sequeira, A. S. A1 - O'Meara, B. A1 - Normark, B. B. A1 - Chung, J. H. A1 - Jordal, B. H. SP - 2011 EP - 2027 VL - 55 UR - http://insects.oeb.harvard.edu/farrell_lab/people/farrell/papers/Farrell_etal_2001.pdf ER - TY - JOUR T1 - A cladistic analysis of pheromone evolution in Ips bark beetles (Coleoptera: Scolytidae). JF - Evolution Y1 - 1997 A1 - Cognato, A.I. A1 - Seybold, S.J. A1 - Wood, D.L. and Teale, S.A. SP - 313 EP - 318 VL - 51 N1 - ORIG-Title-Journal-Volume-Combination: A cladistic analysis pheromone evolution in Ips bark beetles (Coleoptera: Scolytidae). Evolution 51 ER - TY - JOUR T1 - CRYPTIC POSTZYGOTIC ISOLATION IN AN ERUPTIVE SPECIES OF BARK BEETLE (DENDROCTONUS PONDEROSAE) JF - Evolution Y1 - 2011 A1 - Bracewell, Ryan R. A1 - Pfrender, Michael E. A1 - Mock, Karen E. A1 - Bentz, Barbara J. SP - 961 EP - 975 KW - Dendroctonus ponderosae AB - Studies of postzygotic isolation often involve well-differentiated taxa that show a consistent level of incompatibility, thereby limiting our understanding of the initial stages and development of reproductive barriers. Dendroctonus ponderosae provides an informative system because recent evidence suggests that distant populations produce hybrids with reproductive incompatibilities. Dendroctonus ponderosae shows an isolation-by-distance gene flow pattern allowing us to characterize the evolution of postzygotic isolation (e.g., hybrid inviability, hybrid sterility) by crossing populations along a continuum of geographic/genetic divergence. We found little evidence of hybrid inviability among these crosses. However, crosses between geographically distant populations produced sterile males (consistent with Haldane's rule). This effect was not consistent with the fixation of mutations in an isolation-by-distance pattern, but instead is spatially localized. These reproductive barriers are uncorrelated with a reduction in gene flow suggesting their recent development. Crosses between geographically proximal populations bounding the transition from compatibility to hybrid male sterility showed evidence of unidirectional reduction in hybrid male fecundity. Our study describes significant postzygotic isolation occurring across a narrow and molecularly cryptic geographic zone between the states of Oregon and Idaho. This study provides a view of the early stages of postzygotic isolation in a geographically widespread species. VL - 65 SN - 0014-3820 ER - TY - JOUR T1 - Phylogeny and Evolution of parthenogenetic weevils of the Aramigus tessellates species complex (Coleoptera: Curculionidae: Naupactini): evidence from mitochondrial DNA sequences. JF - Evolution Y1 - 1996 A1 - Normark, B. B. SP - 734 EP - 745 VL - 50 N1 - ORIG-Title-Journal-Volume-Combination: Phylogeny and evolution of parthenogenetic weevils of the Aramigus tessellates species complex (Coleoptera: Curculionidae: Naupactini): evidence from mitochondrial DNA sequences. Evolution 50 ER - TY - JOUR T1 - The Evolution of agriculture in beetles (Curculionidae: Scolytinae and Platypodinae). JF - Evolution Y1 - 2001 A1 - Farrell, B. D. A1 - Sequeira, A. S. A1 - O’Meara, B. A1 - Normark, B. B. A1 - Chung, J. A1 - Jordal, B. H. SP - 2011 EP - 2027 VL - 55 N1 - ORIG-Title-Journal-Volume-Combination: The evolution of agriculture in beetles (Curculionidae: Scolytinae and Platypodinae). Evolution 55 ER - TY - JOUR T1 - Colonization and diversification of the species Brachyderes rugatus (Coleoptera) on the Canary Islands: evidence from mitochondrial DNA COII gene sequences. JF - Evolution Y1 - 2000 A1 - Emerson, B. C. A1 - Oromi, P. A1 - Hewitt, G.M. SP - 911 EP - 923 VL - 54 N1 - ORIG-Title-Journal-Volume-Combination: Colonization and diversification of the species Brachyderes rugatus (Coleoptera) on the Canary Islands: evidence from mitochondrial DNA COII gene sequences. Evolution 54 ER - TY - JOUR T1 - A cladistic analysis of pheromone evolution in Ips bark beetles (Coleoptera: Scolytidae). JF - Evolution Y1 - 1997 A1 - Cognato, A.I. A1 - Seybold, S.J. A1 - Wood, D.L. and Teale, S.A. SP - 313 EP - 318 VL - 51 N1 - ORIG-Title-Journal-Volume-Combination: A cladistic analysis pheromone evolution in Ips bark beetles (Coleoptera: Scolytidae). Evolution 51 U1 - 1287 ER -