Blar i forfatter Norges arktiske universitetsmuseum "Green, Richard E."

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    • Genomic Evidence of Widespread Admixture from Polar Bears into Brown Bears during the Last Ice Age 

      Cahill, James A.; Heintzman, Peter D.; Harris, Kelley; Teasdale, Matthew D.; Kapp, Joshua D.; Soares, Andre, E. R.; Stirling, Ian; Bradley, Daniel; Edwards, Ceiridwen J.; Graim, Kiley; Kisleika, Aliaksandr A.; Malev, Alexander V.; Monaghan, Nigel; Green, Richard E.; Shapiro, Beth (Journal article; Tidsskriftartikkel, 2018-02-20)
      Recent genomic analyses have provided substantial evidence for past periods of gene flow from polar bears (<i>Ursus maritimus</i>) into Alaskan brown bears (<i>Ursus arctos</i>), with some analyses suggesting a link between climate change and genomic introgression. However, because it has mainly been possible to sample bears from the present day, the timing, frequency, and evolutionary significance ...

    • Minimizing polymerase biases in metabarcoding 

      Nichols, Ruth V.; Vollmers, Christopher; Newsom, Lee A.; Wang, Yue; Heintzman, Peter D.; Leighton, McKenna; Green, Richard E.; Shapiro, Beth (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-24)
      DNA metabarcoding is an increasingly popular method to characterize and quantify biodiversity in environmental samples. Metabarcoding approaches simultaneously amplify a short, variable genomic region, or “barcode,” from a broad taxonomic group via the polymerase chain reaction (PCR), using universal primers that anneal to flanking conserved regions. Results of these experiments are reported as ...

    • Natural selection shaped the rise and fall of passenger pigeon genomic diversity 

      Murray, Gemma G.R.; Soares, André E.R.; Novak, Ben J.; Schaefer, Nathan K.; Cahill, James A.; Baker, Allan J.; Demboski, John R.; Doll, Andrew; Da Fonseca, Rute R.; Fulton, Tara L.; Gilbert, Marcus Thomas Pius; Heintzman, Peter D.; Letts, Brandon; McIntosh, George; O'Connell, Brendan L.; Peck, Mark; Pipes, Marie-Lorraine; Rice, Edward S.; Santos, Kathryn M.; Sohrweide, A. Gregory; Vohr, Samuel H.; Corbett-Detig, Russell B.; Green, Richard E.; Shapiro, Beth (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-17)
      The extinct passenger pigeon was once the most abundant bird in North America, and possibly the world. Although theory predicts that large populations will be more genetically diverse, passenger pigeon genetic diversity was surprisingly low. To investigate this disconnect, we analyzed 41 mitochondrial and 4 nuclear genomes from passenger pigeons and 2 genomes from band-tailed pigeons, which are ...