Search Results - "Bracewell, Ryan"

Know your farmer: Ancient origins and multiple independent domestications of ambrosia beetle fungal cultivars by Vanderpool, Dan, Bracewell, Ryan R., McCutcheon, John P.

“…Bark and ambrosia beetles are highly specialized weevils (Curculionidae) that have established diverse symbioses with fungi, most often from the order…”
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Rapid neo-sex chromosome evolution and incipient speciation in a major forest pest by Bracewell, Ryan R., Bentz, Barbara J., Sullivan, Brian T., Good, Jeffrey M.

“…Genome evolution is predicted to be rapid following the establishment of new (neo) sex chromosomes, but it is not known if neo-sex chromosome evolution plays…”
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Dynamic turnover of centromeres drives karyotype evolution in Drosophila by Bracewell, Ryan, Chatla, Kamalakar, Nalley, Matthew J, Bachtrog, Doris

“…Centromeres are the basic unit for chromosome inheritance, but their evolutionary dynamics is poorly understood. We generate high-quality reference genomes for…”
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Complex Evolutionary History of the Y Chromosome in Flies of the Drosophila obscura Species Group by Bracewell, Ryan, Bachtrog, Doris

“…Abstract The Drosophila obscura species group shows dramatic variation in karyotype, including transitions among sex chromosomes. Members of the affinis and…”
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Broadscale Specificity in a Bark Beetle–Fungal Symbiosis: a Spatio-temporal Analysis of the Mycangial Fungi of the Western Pine Beetle by Bracewell, Ryan R, Six, Diana L

“…Whether and how mutualisms are maintained through ecological and evolutionary time is a seldom studied aspect of bark beetle–fungal symbioses. All bark beetles…”
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Reproductive isolation and environmental adaptation shape the phylogeography of mountain pine beetle (Dendroctonus ponderosae) by Dowle, Eddy J., Bracewell, Ryan R., Pfrender, Michael E., Mock, Karen E., Bentz, Barbara J., Ragland, Gregory J.

“…Chromosomal rearrangement can be an important mechanism driving population differentiation and incipient speciation. In the mountain pine beetle (MPB,…”
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Chromosome-Level Assembly of Drosophila bifasciata Reveals Important Karyotypic Transition of the X Chromosome by Bracewell, Ryan, Tran, Anita, Chatla, Kamalakar, Bachtrog, Doris

“…The species group is one of the most studied clades of Drosophila and harbors multiple distinct karyotypes. Here we present a genome assembly and annotation of…”
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A chromosome-scale genome assembly and evaluation of mtDNA variation in the willow leaf beetle Chrysomela aeneicollis by Bracewell, Ryan R, Stillman, Jonathon H, Dahlhoff, Elizabeth P, Smeds, Elliott, Chatla, Kamalakar, Bachtrog, Doris, Williams, Caroline, Rank, Nathan E

“…Abstract The leaf beetle Chrysomela aeneicollis has a broad geographic range across Western North America but is restricted to cool habitats at high elevations…”
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Transcriptomic evidence indicates that montane leaf beetles prioritize digestion and reproduction in a sex-specific manner during emergence from dormancy by Roberts, Kevin T., Stillman, Jonathon H., Rank, Nathan E., Dahlhoff, Elizabeth P., Bracewell, Ryan R., Elmore, Joanna, Williams, Caroline M.

“…During winter, many organisms conserve resources by entering dormancy, suppressing metabolism and biosynthesis. The transition out of winter dormancy to summer…”
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Experimental evidence of bark beetle adaptation to a fungal symbiont by Bracewell, Ryan R., Six, Diana L.

“…The importance of symbiotic microbes to insects cannot be overstated; however, we have a poor understanding of the evolutionary processes that shape most…”
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Patterns of Genome-Wide Diversity and Population Structure in the Drosophila athabasca Species Complex by Wong Miller, Karen M, Bracewell, Ryan R, Eisen, Michael B, Bachtrog, Doris

“…The Drosophila athabasca species complex contains three recently diverged, prezygotically isolated semispecies (Western-Northern, Eastern-A, and Eastern-B)…”
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Massive gene amplification on a recently formed Drosophila Y chromosome by Bachtrog, Doris, Mahajan, Shivani, Bracewell, Ryan

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Genetic architecture and phenotypic plasticity of thermally-regulated traits in an eruptive species, Dendroctonus ponderosae by Bentz, Barbara J., Bracewell, Ryan R., Mock, Karen E., Pfrender, Michael E.

“…Phenotypic plasticity in thermally-regulated traits enables close tracking of changing environmental conditions, and can thereby enhance the potential for…”
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CRYPTIC POSTZYGOTIC ISOLATION IN AN ERUPTIVE SPECIES OF BARK BEETLE (DENDROCTONUS PONDEROSAE) by Bracewell, Ryan R., Pfrender, Michael E., Mock, Karen E., Bentz, Barbara J.

“…Studies of postzygotic isolation often involve well-differentiated taxa that show a consistent level of incompatibility, thereby limiting our understanding of…”
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Contrasting Geographic Patterns of Genetic Differentiation in Body Size and Development Time with Reproductive Isolation in Dendroctonus ponderosae (Coleoptera: Curculionidae, Scolytinae) by Bracewell, Ryan R, Pfrender, Michael E, Mock, Karen E, Bentz, Barbara J

“…Body size and development time are two critical phenotypic traits that can be highly adaptive in insects. Recent population genetic analyses and crossing…”
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Sex and neo-sex chromosome evolution in beetles by Bracewell, Ryan, Tran, Anita, Chatla, Kamalakar, Bachtrog, Doris

“…Beetles are the most species-rich group of animals and harbor diverse karyotypes. Most species have XY sex chromosomes, but X0 sex determination mechanisms are…”
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Massive gene amplification on a recently formed Drosophila Y chromosome by Bachtrog, Doris, Mahajan, Shivani, Bracewell, Ryan

“…Widespread loss of genes on the Y is considered a hallmark of sex chromosome differentiation. Here we show that the initial stages of Y evolution are driven by…”
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Multi-locus genomic signatures of local adaptation to snow across the landscape in California populations of a willow leaf beetle by Keller, Abigail G, Dahlhoff, Elizabeth P, Bracewell, Ryan, Chatla, Kamalakar, Bachtrog, Doris, Rank, Nathan E, Williams, Caroline M

“…Organisms living in mountains contend with extreme climatic conditions, including short growing seasons and long winters with extensive snow cover…”
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Temperature effects on growth of fungal symbionts of the western pine beetle, Dendroctonus brevicomis by Dysthe, Joseph C., Bracewell, Ryan, Six, Diana L.

“…Differences in temperature ranges and optima among poikilothermic partners in symbioses can have profound effects on their interactions and stability. In this…”
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CRYPTIC POSTZYGOTIC ISOLATION IN AN ERUPTIVE SPECIES OF BARK BEETLE (DENDROCTONUS PONDEROSAE): CYRPIC POSTZYGOTIC ISOLATION IN AN ERUPTIVE SPECIES by Bracewell, Ryan R., Pfrender, Michael E., Mock, Karen E., Bentz, Barbara J.

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