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9/28/2018 | 11:10 AM - 11:25 AM | Phylogeographic Variation in the Spruce Grouse (Canachites canadensis) Complex Based on mtDNA and nuDNA Sequences. | Eccles Conference Center Auditorium
Phylogeographic Variation in the Spruce Grouse (Canachites canadensis) Complex Based on mtDNA and nuDNA Sequences.
The Spruce Grouse complex is distributed across Canada and the northern United States where its members are permanent residents of boreal and cordilleran coniferous forests. It comprises three relatively well-marked, geographically replacing taxa that have been alternately ranked as either subspecies or species by various authors. We sequenced the mitochondrial DNA control region and an intron at the nuclear aconitase locus from populations from across its range to estimate the pattern and magnitude of geographic structure in the complex. Nucleotide diversity varied greatly for both genes among the 31 populations sampled and was zero in some peripheral samples. For the mitochondrial gene, 70% of the total genetic variance was distributed among populations; for the nuclear locus, the corresponding estimate was 36%. The geographic pattern of this genetic differentiation was roughly congruent with the known distributions of the three principal plumage morphs. Two of these, the Canada Spruce Grouse and Franklin’s Spruce Grouse, meet and hybridize in several narrow hybrid zones in the Canadian provinces of British Columbia and Alberta. In those hybrid zones, the nuclear genetic data were consistent with adult male plumage type; however, the geographical transition in the mitochondrial gene was offset from that of the plumage pattern and the nuclear gene by several hundred kilometers. The widths of these hybrid zones are too narrow to be the result of neutral introgression alone.
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Presenters/Authors
George Barrowclough
(), American Museum of Natural History, gfb@amnh.org;
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Jeff Groth
(), American Museum of Natural History, jgg@amnh.org;
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Jonas Lai
(), American Museum of Natural History, JLai@amnh.org;
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Michael Schroeder
(), Washington Department of Fish and Wildlife, Michael.schroeder@dfw.wa.gov;
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