Data from: Host behavior drives parasite genetics at multiple geographic scales: population genetics of the chewing louse, Thomomydoecus minor
Data files
Jul 07, 2015 version files 590.64 KB
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13BigPops7lociBayesAss.in.txt
46.91 KB
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Gopher Bfib multiple alleles.fasta
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Gopher Bfib NJ tree.newick
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Gopher CO1 NJ tree.newick
526 B
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Gopher CO1.fasta
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Gopher IRBP alleles.fasta
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Gopher IRBP NJ tree.newick
1.27 KB
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Gopher Rag all alleles.fasta
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Gopher Rag NJ tree.newick
904 B
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Thomomydoecus 275 specimens COI data.fasta
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Thomomydoecus 275 specimens COI tree.newick
9.57 KB
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Thomomydoecus minor 7 loci 15 infrapopulations input for Structure.str
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Thomomydoecus minor 7 loci input for FSTAT.dat
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Thomomydoecus minor 7 loci msat Genotypes Ready For Convert.xlsx
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Thomomydoecus minor 7 loci Northern pops only input for Structure.str
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Thomomydoecus minor 7 loci Southern pops only input for Structure.str
9.83 KB
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Thomomydoecus7Loci15pops input for Arlequin.arp
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ThomomydoecusmtDNA input for Arlequin.275.arp
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Abstract
Pocket gophers and their symbiotic chewing lice form a host–parasite assemblage known for a high degree of cophylogeny, thought to be driven by life history parameters of both host and parasite that make host switching difficult. However, little work to date has focused on determining whether these life histories actually impact louse populations at the very fine scale of louse infrapopulations (individuals on a single host) at the same or at nearby host localities. We used microsatellite and mtDNA sequence data to make comparisons of chewing-louse (Thomomydoecus minor) population subdivision over time and over geographic space where there are different potential amounts of host interaction surrounding a zone of contact between two hybridizing pocket-gopher subspecies. We found that chewing lice had high levels of population isolation consistent with a paucity of horizontal transmission even at the very fine geographic scale of a single alfalfa field. We also found marked genetic discontinuity in louse populations corresponding with host subspecies and little, if any, admixture in the louse genetic groups even though the lice are closely related. The correlation of louse infrapopulation differentiation with host interaction at multiple scales, including across a discontinuity in pocket-gopher habitat, suggests that host behaviour is the primary driver of parasite genetics. This observation makes sense in light of the life histories of both chewing lice and pocket gophers and provides a powerful explanation for the well-documented pattern of parallel cladogenesis in pocket gophers and chewing lice.