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44 results for “mountain pine”
Functional genomics of mountain pine beetle (Dendroctonus ponderosae) midguts and fatbodies
GEO Series GSE17858. Dendroctonus ponderosae. 44 samples. Type: Expression profiling by array.
Quantitative transcriptomics of pheromone biosynthetic midgut and fat body tissues in the mountain pine beetle, Dendroctonus ponderoase Hopkins
GEO Series GSE69061. Dendroctonus ponderosae. 32 samples. Type: Expression profiling by high throughput sequencing.
Data from: Speciation in mountain refugia: phylogeography and demographic history of the pine siskin and black-capped siskin complex
Following Pleistocene glacial maxima, species that adapted to temperate climates in low-latitude refugia had to modify their ranges as climate changed, expanding either latitudinally towards the poles, or altitudinally to higher elevations in mountainous regions. Within just a few thousand years, populations taking alternative routes during interglacials became isolated from each other and subjected to different selection pressures, often leading to lineage divergence and speciation. The pine siskin Spinus pinus is a common and widespread songbird showing relative phenotypic uniformity across the North American continent. One exception is the subspecies found in the highlands of northern Central America (S. p. perplexus), which shows marked differentiation in plumage color and shares some traits with the endemic and partly sympatric black-capped siskin S. atriceps, suggesting potential introgression or even a hybrid origin of perplexus. Relationships and species limits among pinus, perplexus and atriceps have been controversial for decades. We provide new molecular evidence to help resolve the evolutionary history of the group. Phylogenetic analysis of mitochondrial DNA and nuclear intron sequences revealed three distinct lineages within the complex, corresponding to: 1) S. pinus individuals from Canada through central Mexico (S. p. pinus and S. p. macropterus), 2) individuals from the highlands of Guatemala and Chiapas (S. p. perplexus), and 3) S. atriceps. Pine siskins across North America show evidence of a recent postglacial population expansion and extremely low levels of diversity and structure. In contrast, S. p. perplexus shows evidence of demographic stasis, reflecting long-term isolation and restricted dispersal. Marked and diagnostic genetic differences among the three lineages in mtDNA and at least one intron, suggest that a hybrid origin of S. p. perplexus is unlikely, yet some degree of introgression between S. p. perplexus and S. atriceps cannot be ruled out in localities where they occur in sympatry.
Data from: Speciation in mountain refugia: phylogeography and demographic history of the pine siskin and black-capped siskin complex
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