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13 results for “Dendroctonus ponderosae”
Data from: Reproductive isolation and environmental adaptation shape the phylogeography of mountain pine beetle (Dendroctonus ponderosae)
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Data from: Repurposing population genetics data to discern genomic architecture: a case study of linkage cohort detection in mountain pine beetle (Dendroctonus ponderosae)
Genetic surveys of the population structure of species can be used as resources for exploring their genomic architecture. By adjusting filtering assumptions, genome-wide single nucleotide polymorphism (SNP) datasets can be reused to give new insights into the genetic basis of divergence and speciation without targeted re-sampling of specimens. Filtering only for missing data and minor allele frequency, we used a combination of principle components analysis and linkage disequilibrium network analysis to distinguish three cohorts of variable SNPs in the mountain pine beetle in western Canada, including one that was sex-linked and one that was geographically associated. These marker cohorts indicate genomically localized differentiation, and their detection demonstrates an accessible and intuitive method for discovering potential islands of genomic divergence without a priori knowledge of a species' genomic architecture. Thus, this method has utility for directly addressing the genomic architecture of species and generating new hypotheses for functional research.
Data from: Polygamy and an absence of fine-scale structure in Dendroctonus ponderosae (Hopk.) (Coleoptera: Curcilionidae) confirmed using molecular markers
An understanding of mating systems and fine-scale spatial genetic structure is required to effectively manage forest pest species such as Dendroctonus ponderosae (mountain pine beetle). Here we used genome-wide single-nucleotide polymorphisms to assess the fine-scale genetic structure and mating system of D. ponderosae collected from a single stand in Alberta, Canada. Fine-scale spatial genetic structure was absent within the stand and the majority of genetic variation was best explained at the individual level. Relatedness estimates support previous reports of pre-emergence mating. Parentage assignment tests indicate that a polygamous mating system better explains the relationships among individuals within a gallery than the previously reported female monogamous/male polygynous system. Furthermore, there is some evidence to suggest that females may exploit the galleries of other females, at least under epidemic conditions. Our results suggest that current management models are likely to be effective across large geographic areas based on the absence of fine-scale genetic structure.
Fig. 3. A in The Current Status of Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae: Scolytinae) in Mexico
Fig. 3. A) Maximum-likelihood phylogenetic tree based on COI sequences (800 bp) from Dendroctonus ponderosae and closely related species, built in the aLRT-PHYML platform (Guindon et al. 2010). The model determined with ModelTest v3.7 was TIM2+I+G model (-lnL = 3212.0225, AIC= 6528.04), base frequencies A = 0.3093, C = 0.1449, G = 0.1330, T = 0.4128, gamma distributed rate variation (G = 0.4870) (Posada and Crandall 1998). Dendroctonus pseudotsugae and Dendroctonus simplex were used as outgroups. Arrow shows the position of the Chihuahua sample. The accession number in GenBank of MPB sequences and reference sequences are shown in the tree. B) Records of D. ponderosae in southern Arizona (AZ) and Mexico (Baja California - BC, Chihuahua - Ch).
Fig. 2 in The Current Status of Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae: Scolytinae) in Mexico
Fig. 2. Anchor and seminal rod of Dendroctonus ponderosae. Specimens from Chihuahua, Mexico: A) Anchor and seminal rod, dorsal and lateral views, B) Anchor, dorsal view, C) Seminal rod, dorsal and lateral views. Specimens from British Columbia, Canada: D) Anchor, dorsal view, E) Seminal rod dorsal and lateral views. bs = body of seminal rod, llb = lateral lobes of seminal rod anchor, psv = prolongation of seminal valve, sv = seminal valve.
Fig. 1. Dendroctonus ponderosae female from Chihuahua Mexico. A in The Current Status of Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae: Scolytinae) in Mexico
Fig. 1. Dendroctonus ponderosae female from Chihuahua Mexico. A) Dorsal habitus; B) Lateral habitus, C) Head, frontal view, arrow indicates elevation of epistomal process, D–F) Pronotum, dorsal view, G) Elytra, dorsolateral view, H) Elytral declivity, ventral view.
Data from: Spatial genetic structure of the mountain pine beetle (Dendroctonus ponderosae) outbreak in western Canada: historical patterns and contemporary dispersal
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Data from: Rapid increases in forest understory diversity and productivity following a mountain pine beetle (Dendroctonus ponderosae) outbreak in pine forests
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Data from: Repurposing population genetics data to discern genomic architecture: a case study of linkage cohort detection in mountain pine beetle (Dendroctonus ponderosae)
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Data from: Polygamy and an absence of fine-scale structure in Dendroctonus ponderosae (Hopk.) (Coleoptera: Curcilionidae) confirmed using molecular markers
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Data from: Adaptive and neutral markers both show continent-wide population structure of mountain pine beetle (Dendroctonus ponderosae)
Assessments of population genetic structure and demographic history have traditionally been based on neutral markers while explicitly excluding adaptive markers. In this study, we compared the utility of putatively adaptive and neutral single-nucleotide polymorphisms (SNPs) for inferring mountain pine beetle population structure across its geographic range. Both adaptive and neutral SNPs, and their combination, allowed range-wide structure to be distinguished and delimited a population that has recently undergone range expansion across northern British Columbia and Alberta. Using an equal number of both adaptive and neutral SNPs revealed that adaptive SNPs resulted in a stronger correlation between sampled populations and inferred clustering. Our results suggest that adaptive SNPs should not be excluded prior to analysis from neutral SNPs as a combination of both marker sets resulted in better resolution of genetic differentiation between populations than either marker set alone. These results demonstrate the utility of adaptive loci for resolving population genetic structure in a nonmodel organism.
Data from: Adaptive and neutral markers both show continent-wide population structure of mountain pine beetle (Dendroctonus ponderosae)
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Functional genomics of mountain pine beetle (Dendroctonus ponderosae) midguts and fatbodies
GEO Series GSE17858. Dendroctonus ponderosae. 44 samples. Type: Expression profiling by array.
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