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30 results for “Microtus arvalis”
Data from: Structure and dynamics of hybrid zones at multiple stages of speciation in the common vole (Microtus arvalis)
The genetic structure and dynamics of hybrid zones provides crucial information for the understanding of the processes and mechanisms of evolutionary divergence and speciation. In general, higher levels of evolutionary divergence between taxa are more likely to be associated with reproductive isolation and may result in suppressed or strongly restricted hybridization. In this study, we examined the structure and processes in two secondary contact zones between three deep evolutionary lineages in the common vole (Microtus arvalis). Differences in divergence times between the lineages have the potential to shed light on different stages of reproductive isolation and thus provide information on the ongoing speciation process in M. arvalis. We examined more than 800 individuals for mitochondrial (mtDNA), Y-chromosome and autosomal markers, and used assignment and cline analysis methods to characterize the extent and direction of gene flow in the contact zones. Introgression of both autosomal and mtDNA markers in a relatively broad area of admixture indicates selectively neutral hybridization between the least-divergent lineages (Central and Eastern) without evidence for partial reproductive isolation. In contrast, a very narrow area of hybridization, shifts in marker clines and the quasi-absence of Y-chromosome introgression support a moving hybrid zone and unidirectional selection against male hybrids between the lineages with older divergence (Central and Western). Data from a replicate sampling transect provided further support for non-neutral processes in this hybrid zone and suggests additionally a role for the landscape history in the extent of the movement and shaping of gene flow profiles.
FIGURE 19. Tenoraia janickii from Microtus arvalis from Hungary. A. Scolex and neck. B in Phylogenetic relationships and taxonomic revision of Paranoplocephala Lühe, 1910 sensu lato (Cestoda, Cyclophyllidea, Anoplocephalidae)
FIGURE 19. Tenoraia janickii from Microtus arvalis from Hungary. A. Scolex and neck. B. Mature proglottid (redrawn from Tenora et al. 1985b).
Figure 3 in Variation in leukocyte indices and immunoglobulin levels according to host density, sex, flea burden and tularemia prevalence in the common vole Microtus arvalis
Figure 3: Relationships between the proportion of eosinophils and a) vole density (number of captured voles/100 traps/24 h), and b) tularemia and flea prevalence in voles. The grey shaded area shows the 95 % confidence intervals of the predicted curve (a; left) and error bars show standard deviations (b; right).
Figure 2 in Variation in leukocyte indices and immunoglobulin levels according to host density, sex, flea burden and tularemia prevalence in the common vole Microtus arvalis
Figure 2: Relationship between the neutrophil-to-lymphocyte (N:L) ratio and vole density index according to sex. Vole density was estimated as the number of captured voles/100 traps/24 h. Grey shaded areas show the 95 % confidence intervals of the predicted curves.
Figure 1 in Variation in leukocyte indices and immunoglobulin levels according to host density, sex, flea burden and tularemia prevalence in the common vole Microtus arvalis
Figure 1: Relationship between the a) neutrophil-to-lymphocyte (N:L) ratio and immunoglobulin (Ig) levels according to vole sex, and between the b) proportion of eosinophils and Ig levels. Grey shaded areas show the 95 % confidence intervals of the predicted curves.
Association of SNPs in Microtus arvalis and clade infections by TULV-CEN.S and TULV-EST.S
<p>The natural host ranges of many viruses are restricted to very specific taxa. Little is known about the molecular barriers between species that lead to the establishment of this restriction or generally prevent virus emergence in new hosts. Here, we identify genomic polymorphisms in a natural rodent host associated with a strong genetic barrier to the transmission of the European Tula orthohantavirus (TULV). We analyzed the very abrupt spatial transition between two major phylogenetic clades in TULV across the comparatively much wider natural hybrid zone between evolutionary lineages of their reservoir host, the common vole (<i>Microtus arvalis</i>). A genomic scan of 79 225 Single Nucleotide Polymorphisms (SNPs) in 323 TULV infected host individuals detected 30 SNPs that were associated with specific TULV clades in two replicate sampling transects. Focusing the analysis on 199 voles with evidence of genomic admixture at the individual level (0.1 - 0.9) supported statistical significance for all 30 loci. Host genomic variation at these SNPs explained up to 37.6% of clade-specific TULV infections. Genes in the vicinity of associated SNPs are involved in functions related to immune response or membrane transport. This study demonstrates the relevance of natural hybrid zones as systems not only for studying processes of evolutionary divergence and speciation, but also for the detection of evolving genetic barriers for specialized parasites.</p>
Association of SNPs in Microtus arvalis and clade infections by TULV-CEN.S and TULV-EST.S
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Data from: Structure and dynamics of hybrid zones at multiple stages of speciation in the common vole (Microtus arvalis)
Open the record for dataset details and reuse information.
Figure 2 in Inferring phylogenetic relationships in the common vole (Microtus arvalis) based on mitochondrial and nuclear sequence diversities
Figure 2. Median-joining network obtained from CYTB haplotypes of Anatolian, Asian and European populations of M. arvalis. Number of mutations are shown by black lines on the branches.
On following pages: 149. Meadow Vole (Microtus pennsyivanicus); 150. Long-tailed Vole (Microtus longicaudus); 151. Creeping Vole (Microtus oregoni); 152. Major's Pine Vole (Microtus majori); 153. Common Pine Vole (Microtus subterraneus); 154. Caucasian Pine Vole (Microtus daghestanicus); 155. Alpine Pine Vole (Microtus multiplex); 156. Liechtenstein's Pine Vole (Microtus liechtensteini); 157. Tatra Pine Vole (Microtus tatricus): 158. Mediterranean Pine Vole (Microtus duodecimcostatus); 159. Lusitanian Pine Vole (Microtus lusitanicus); 160. Pyrenean Pine Vole (Microtus gerbil); 161. Savi's Pine Vole (Microtus savii): 162. Calabria Pine Vole (Microtus brachycercus); 163. Sicilian Pine Vole (Microtus nebrodensis); 164. Thomas's Pine Vole (Microtus thomasi); 165. Balkan Pine Vole (Microtus felteni); 166. Schelkovnikov's Pine Vole (Microtus schelkovnikovi): 167. Harting's Vole (Microtus hartingi); 168. Levant Vole (Microtus guentheri); 169. Dogramaci's Vole (Microtus dogramacii); 170. Cyrenaica Vole (Microtus mustersi); 171. Social Vole (Microtus socialis): 172. Anatolian Vole (Microtus anatolicus): 173. Iranian Vole (Microtus iran); 174. Kopet Dag Pine Vole (Microtus paradoxus); 175. Common Vole (Microtus arvalis); 176. Altai Vole (Microtus obscurus); 177. East European Vole (Microtus mystacinus); 178. Kerman Vole (Microtus kermanensis); 179. Transcaspian Vole (Microtus transcaspicus); 180. Tian Shan Vole (Microtus ilaeus). in Cricetidae
On following pages: 149. Meadow Vole (Microtus pennsyivanicus); 150. Long-tailed Vole (Microtus longicaudus); 151. Creeping Vole (Microtus oregoni); 152. Major's Pine Vole (Microtus majori); 153. Common Pine Vole (Microtus subterraneus); 154. Caucasian Pine Vole (Microtus daghestanicus); 155. Alpine Pine Vole (Microtus multiplex); 156. Liechtenstein's Pine Vole (Microtus liechtensteini); 157. Tatra Pine Vole (Microtus tatricus): 158. Mediterranean Pine Vole (Microtus duodecimcostatus); 159. Lusitanian Pine Vole (Microtus lusitanicus); 160. Pyrenean Pine Vole (Microtus gerbil); 161. Savi's Pine Vole (Microtus savii): 162. Calabria Pine Vole (Microtus brachycercus); 163. Sicilian Pine Vole (Microtus nebrodensis); 164. Thomas's Pine Vole (Microtus thomasi); 165. Balkan Pine Vole (Microtus felteni); 166. Schelkovnikov's Pine Vole (Microtus schelkovnikovi): 167. Harting's Vole (Microtus hartingi); 168. Levant Vole (Microtus guentheri); 169. Dogramaci's Vole (Microtus dogramacii); 170. Cyrenaica Vole (Microtus mustersi); 171. Social Vole (Microtus socialis): 172. Anatolian Vole (Microtus anatolicus): 173. Iranian Vole (Microtus iran); 174. Kopet Dag Pine Vole (Microtus paradoxus); 175. Common Vole (Microtus arvalis); 176. Altai Vole (Microtus obscurus); 177. East European Vole (Microtus mystacinus); 178. Kerman Vole (Microtus kermanensis); 179. Transcaspian Vole (Microtus transcaspicus); 180. Tian Shan Vole (Microtus ilaeus).
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