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16 results for “Leptinotarsa decemlineata”
Figure 3 in On the successful acclimatization of the Colorado potato beetle Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae) in Primorsky kray
Figure 3. Modelling of the ecological niches of the Colorado potato beetle for the Far Eastern, European, and North American habitats by the method of metric two-dimensional
Figure 3 in On the successful acclimatization of the Colorado potato beetle Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae) in Primorsky kray
Figure 3. Modelling of the ecological niches of the Colorado potato beetle for the Far Eastern, European, and North American habitats by the method of metric two-dimensional scaling using the Jaccard coefficient.
Figure 1 in On the successful acclimatization of the Colorado potato beetle Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae) in Primorsky kray
Figure 1. Dynamics of the population size of the Colorado potato beetle over the year of the research (population peaks are shown on average for Primorsky Kray).
Figure 5 in Exploring the efficacy of RNAi-mediated gene knock-down via oral delivery of dsRNA in the Colorado potato beetle (Leptinotarsa decemlineata Say)
Figure 5. Effect of dsRNA feeding on leaf consumption was assessed in L. decemlineata larvae at different instars: (a) third instar and (b) fourth instar, following the feeding assay. Bars indicate standard error (SE) on columns. Different letters on the columns denote significant differences determined by ANOVA followed by the Tukey HSD test at a 5% significance level.
Figure 4 in Exploring the efficacy of RNAi-mediated gene knock-down via oral delivery of dsRNA in the Colorado potato beetle (Leptinotarsa decemlineata Say)
Figure 4. Influence of dsRNA ingestion on weight gain was calculated in the L. decemlineata larvae at different instars: (a) third instar and (b) fourth instar, following the feeding assay. Bars indicate standard error (SE) in columns. Different letters on the columns denote significant differences determined by ANOVA followed by the Tukey HSD test at a 5% significance level.
Figure 3 in Exploring the efficacy of RNAi-mediated gene knock-down via oral delivery of dsRNA in the Colorado potato beetle (Leptinotarsa decemlineata Say)
Figure 3. Effect of the dsRNA feeding on the V-ATPase expression levels in the L. decemlineata larvae at different instar stages: (a) First instar, (b) second instar, (c) third instar, and (d) fourth instar. Bars indicate the standard error (SE) in the columns. Different letters on the columns denote significant differences determined by ANOVA followed by the Tukey HSD test at a 5% significance level.
Figure 2. Mortality percentages after feeding the L in Exploring the efficacy of RNAi-mediated gene knock-down via oral delivery of dsRNA in the Colorado potato beetle (Leptinotarsa decemlineata Say)
Figure 2. Mortality percentages after feeding the L. decemlineata larvae dsRNA-treated leaves at different instars. (a) First instar, (b) second instar, (c) third instar, and (d) fourth instar. The percent mortality was compared in the larvae fed potato leaves pretreated with E. coli HT115 (DE3) cells expressing dsV-ATPase compared to the two controls, E. coli HT115 (DE3) cells with empty L4440 plasmid (dsEmp) and E. coli HT115 expressing dsGFP. Different letters on the data points denote significant differences determined by ANOVA followed by the Tukey honest significant difference (HSD) test at a 5% significance level.
Elevated rates of positive selection drive the evolution of pestiferousness in the Colorado potato beetle ( Leptinotarsa decemlineata, Say)
<p class="Paragraph">In order to understand the evolution of pestiferousness, which we define as the accumulation of traits that contribute to an insect population's success in an agroecosystem, we tested the importance of known genomic properties associated with rapid adaptation. Within the leaf beetle genus <i>Leptinotarsa</i>, only the Colorado potato beetle (CPB), <i>Leptinotarsa decemlineata</i> Say, and a few populations therein, has risen to pest status on cultivated nightshades, <i>Solanum</i>. Using whole genomes from ten closely related <i>Leptinotarsa</i> species native to the United States we reconstructed a high-quality species tree and used this phylogenetic framework to assess evolutionary patterns in four genomic features of rapid adaptation: standing genetic variation, gene family expansion and contraction, transposable element variation, and positive selection at protein coding genes. Throughout approximately 20 million years of history, <i>Leptinotarsa</i> species show little evidence of gene family turnover and transposable element variation. However, there is a clear pattern of recently derived lineages, including CPB, experiencing higher rates of positive selection on protein coding genes. We determine these rates are associated with greater standing genetic variation due to larger effective population size, which support the theory that the demographic history contributes to rates of protein evolution. Furthermore, we identify a suite of genes under positive selection that are linked to pestiferousness, exclusively, in the Colorado potato beetle lineage. They are involved in the biological processes of xenobiotic detoxification, chemosensation, and hormone function.</p>
Fig. 2 in On the successful acclimatization of the Colorado potato beetle Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae) in Primorsky kray
Fig. 2. Population pyramid of the Colorado potato beetle in Primorsky Kray.
Figure 1 in On the successful acclimatization of the Colorado potato beetle Leptinotarsa decemlineata (Say, 1824) (Coleoptera: Chrysomelidae) in Primorsky kray
Figure 1. Dynamics of the population size of the Colorado potato beetle over the year of
The role of structural variants in pest adaptation and genome evolution of the Colorado potato beetle, Leptinotarsa decemlineata (Say)
<p>Structural variation has been associated with genetic diversity and adaptation in diverse taxa. Despite these observations, it is not yet clear what their relative importance is for microevolution, especially with respect to known drivers of diversity, e.g., nucleotide substitutions, in rapidly adapting species. Here we examine the significance of structural variants (SVs) in pesticide resistance evolution of the agricultural super-pest, the Colorado potato beetle,<em> Leptinotarsa decemlineata</em>. By employing a parent offspring trio sequencing procedure, we develop highly contiguous reference genomes to characterize structural variation within this species. These updated assemblies represent >100-fold improvement of contiguity and include derived pest and ancestral non-pest individuals. We identify >200,000 SVs, which appear to be non-randomly distributed across the genome as they co-occur with transposable elements and genes. SVs intersect exons for a large proportion of gene annotations (~20%) and are associated with insecticide resistance, development, and transcription, most notably cytochrome P450 (CYP) genes. To understand the role that SVs might play in adaptation we measure allele frequencies of SVs for an additional 57 individuals, using whole genome resequencing data, representing pest and non-pest populations of North America. Incorporating multiple independent tests of significance using SNP data, we identify 14<strong> </strong>positively selected genes that include SVs and SNPs of elevated frequency within the sampled pest lineages. Among these, four are associated with insecticide resistance. One of these genes, glycosyltransferase-13, is a duplicated gene enclosed within a structural variant that resides inside the <em>CYP4g15</em> genic region. Both gene products have been observed to be co-induced during insecticide exposure. These results demonstrate the significance of structural variations as a genomic feature to describe species history, genetic diversity, and adaptation.</p>
Annotation and evolutionary analysis of chemosensory gene sequence data in the Colorado potato beetle, Leptinotarsa decemlineata
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The role of structural variants in pest adaptation and genome evolution of the Colorado potato beetle, Leptinotarsa decemlineata (Say)
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Elevated rates of positive selection drive the evolution of pestiferousness in the Colorado potato beetle ( Leptinotarsa decemlineata, Say)
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Figure 1 in Exploring the efficacy of RNAi-mediated gene knock-down via oral delivery of dsRNA in the Colorado potato beetle (Leptinotarsa decemlineata Say)
Figure 1.Phylogenetic relationship of the Vacuolar ATPase proteolipid subunits of several insect species. The phylogenetic tree was constructed using the neighbor-joining approach.
Expression profiling of Solanum chacoense diploid potato lines to identify candidate Colorado potato beetle (Leptinotarsa decemlineata) resistance genes
GEO Series GSE138184. Solanum chacoense. 24 samples. Type: Expression profiling by high throughput sequencing.
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