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42 results for “geographical population structure”
Figure 6 in Geographical variations in waving display and barricade-building behaviour, and genetic population structure in the intertidal brachyuran crab Ilyoplax pusilla (de Haan, 1835)
Figure 6. Parsimony network of mitochondrial DNA cytochrome oxidase subunit I (COI) haplotypes of Ilyoplax pusilla. Haplotypes correspond to Table 5. Single solid line indicates one base. Circle size indicates number of each haplotype. Largest circle, n542; second largest, n514 or 15; third, n58; fourth, n54 or n55; fifth, n52; smallest circle, n51.
Figure 1 in Geographical variations in waving display and barricade-building behaviour, and genetic population structure in the intertidal brachyuran crab Ilyoplax pusilla (de Haan, 1835)
Figure 1. Geographic distribution of Ilyoplax pusilla in Japan (broken line) from Wada et al. (1992), and six localities studied.
Figure 4 in Geographical variations in waving display and barricade-building behaviour, and genetic population structure in the intertidal brachyuran crab Ilyoplax pusilla (de Haan, 1835)
Figure 4. Proportion of extended waves in 30 waving motions of Ilyoplax pusilla at six localities (bar indicates SD). Localities arranged according to latitude. Shared alphabetical letters indicate no significant difference (p.0.05) by Tukey's honestly significant difference test.
Figure 3 in Geographical variations in waving display and barricade-building behaviour, and genetic population structure in the intertidal brachyuran crab Ilyoplax pusilla (de Haan, 1835)
Figure 3. Maximum cheliped extension during waving movements in Ilyoplax pusilla: extended type and non-extended type.
Data from: Geographic population structure of the African malaria vector Anopheles gambiae suggests a role for the forest-savannah biome transition as a barrier to gene flow
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Data from: The geographic mosaic of arms race coevolution is closely matched to prey population structure
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Data from: Geographic extent of introgression in Sebastes mentella and its effect on genetic population structure
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Data from: Geographic and host-mediated population genetic structure in a cestode parasite of the three-spined stickleback
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Data from: Patterns of geographic distribution have a considerable influence on population genetic structure in one common and two rare species of Rhododendron (Ericaceae)
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Data from: Regional and local patterns of genetic variation and structure in yellow-necked mice − the roles of geographic distance, population abundance and winter severity
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Data from: Genetic structure of Omani goats reveals admixture among populations from geographically proximal sites
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Data for: Population structure and inbreeding in wild house mice (Mus musculus) at different geographic scales
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Data from: Geographic range size and latitude predict population genetic structure in a global survey
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Data from: Geographical parthenogenesis and population genetic structure in the alpine species Ranunculus kuepferi (Ranunculaceae)
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Data from: Phylogeography, genetic structure and population divergence time of cheetahs in Africa and Asia: evidence for long-term geographic isolates
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Data from: Geographic structure and adaptive population differentiation in herbivore defense genes in European aspen (Populus tremula L., Salicaceae)
When a phenotypic trait is subjected to spatially variable selection and local adaptation, the underlying genes controlling the trait are also expected to show strong patterns of genetic differentiation because alternative alleles are favoured in different geographical locations. Here, we study 71 single nucleotide polymorphisms (SNPs) from seven genes associated with inducible defence responses in a sample of Populus tremula collected from across Sweden. Four of these genes (PPO2, TI2, TI4 and TI5) show substantial population differentiation, and a principal component analyses conducted on the defence SNPs divides the Swedish population into three distinct clusters. Several defence SNPs show latitudinal clines, although these were not robust to multiple testing. However, five SNPs (located within TI4 and TI5) show strong longitudinal clines that remain significant after multiple test correction. Genetic geographical variation, supporting local adaptation, has earlier been confirmed in genes involved in the photoperiod pathway in P. tremula, but this is, to our knowledge, one of the first times that geographical variation has been found in genes involved in plant defence against antagonists.
Micro-endemic species of snails and amphipods show population genetic structure across very small geographic ranges
<p class="MsoNormal"><span>Understanding variation in population genetic structure, even across small distances and for species with extremely limited ranges, is critical for conservation planning and the development of effective management strategies for imperiled species. Organisms that occupy the same geographic extent can maintain different population structures, ranging from highly diverged to panmictic. Such differences can result from differences in biological characteristics such as dispersal ability or demographic history. We used microsatellite loci to evaluate population genetic structure and variation of four desert spring invertebrates having high to low dispersal ability: the lung snail <em>Physa acuta</em>, two species of gilled snails (<em>Juturnia kosteri</em> and <em>Pyrgulopsis roswellensis</em>; family Hydrobiidae) and the amphipod <em>Gammarus desperatus</em>. The study location represents entire species ranges for the micro-endemic hydrobiids and <em>G. desperatus</em>, while <em>P. acuta</em> is ubiquitous throughout much of North America. We found little evidence of significant population genetic structure for <em>P. acuta</em><span> and </span><em>J. kosteri</em><span>,</span></span><em><span> </span></em><span>but much more for</span><em><span> </span></em><em><span>P. roswellensis </span></em><span>and </span><em><span>G. desperatus.</span></em><span> Our results demonstrate differences in habitat preference and/or dispersal ability between the species. While significant isolation-by-distance was detected in the two hydrobiids, dispersal is likely more limited in <em>P. roswellensis</em> than <em>J. kosteri</em>. This information provides insight into how gene flow shapes varying population genetic structure between species across small spatial scales (<100 km<sup>2</sup>). Most importantly, our results suggest that conservation agencies should not consider these microendemic species to be composed of single populations, but rather, that management plans for such species should account for population genetic variation across the species' ranges.</span></p>
High genetic diversity but no geographic structure of Aedes albopictus populations in Reunion Island _ Dataset
<p>Microsatellite dataset of <em>Aedes albopictus</em> individuals sampled in Reunion Island. </p>
Data from: Geographic structure and adaptive population differentiation in herbivore defense genes in European aspen (Populus tremula L., Salicaceae)
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Micro-endemic species of snails and amphipods show population genetic structure across very small geographic ranges
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International Brain Laboratory public data
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OpenNeuro
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