Project description:The whitefly Bemisa tabaci is a species complex of more than 31 cryptic species which include some of the most destructive invasive pests of many ornamental and glasshouse crops worldwide. Among them, Middle East-Asia Minor 1 (herein MEAM1) and Mediterranean (herein MED) have invaded many countries around the world and displaced the native whitefly species. However, the molecular differences between invasive and indigenous whiteflies remain largely unknown. The global transcriptional difference between the two invasive whitefly Bemisia tabaci species (MEAM1, MED) and one indigenous whitefly species (Asia II 3) were analyzed using the Illumina sequencing technology.
Project description:The whitefly Bemisa tabaci is a species complex of more than 31 cryptic species which include some of the most destructive invasive pests of many ornamental and glasshouse crops worldwide. Among them, Middle East-Asia Minor 1 (herein MEAM1) and Mediterranean (herein MED) have invaded many countries around the world and displaced the native whitefly species. However, the molecular differences between invasive and indigenous whiteflies remain largely unknown.
Project description:The whitefly Bemisa tabaci is a species complex with global distribution and extensive genetic diversity. In this species complex, Middle East-Asia Minor 1 (MEAM1, previously referred to as the âB biotypeâ) species has been spreading rapidly in tropical and subtropical regions. we analyzed the transcriptional responses of the invasive MEAM1 and the indigenous Asia II 3 species of B. tabaci complex during host plant shift (from cotton to tobacco) using the Illumina sequencing technology.The different gene expression pattern of energy and carbonhydrate metabolism and detoxification metabolism between MEAM1 and Asia II 3 were the main reasons of their different capacity of adapation. The global transcriptional difference between the invasive whitefly Bemisia tabaci species (MEAM1) and the indigenous whitefly species (Asia II 3) on cotton and tobacco were analyzed using the Illumina sequencing technology.
Project description:The whitefly Bemisa tabaci is a species complex with global distribution and extensive genetic diversity. In this species complex, Middle East-Asia Minor 1 (MEAM1, previously referred to as the ‘B biotype’) species has been spreading rapidly in tropical and subtropical regions. we analyzed the transcriptional responses of the invasive MEAM1 and the indigenous Asia II 3 species of B. tabaci complex during host plant shift (from cotton to tobacco) using the Illumina sequencing technology.The different gene expression pattern of energy and carbonhydrate metabolism and detoxification metabolism between MEAM1 and Asia II 3 were the main reasons of their different capacity of adapation.
Project description:European sculpins (Cottus) harbor an example of a recent hybrid speciation event, which entails the invasion of a new habitat by the hybrid species. We compare the transcriptomes of both parental species and the hybrid species to understand how they differ. F2 crosses between the parent species are compared to the hybrid species and its parent species to identify unique patterns of the hybrid species due to the initial hybridization process or respectively to other processes. See the accompanying publication (Czypionka et al. 2011.Transcriptome changes after genome wide admixture in invasive sculpins Molecular Ecology no doi yet) for more information. The transcriptome was compared between an invasive hybrid species of Cottus (Sieg population n = 8) and its parent species C.rhenanus and C.perifretum. Expression profiles of both parental populations were assessed by two independent replicate population (C.rhenanus: Broel and Naaf; C.perifretum Laarse Beek and Witte Nete; each population n = 8). The transcriptomes of F2 crosses between the populations of C.rhenanus and C.perifretum were assessed with for independent crosses with 4 biological replicates for each cross (n = 4 x 4 = 16). We used a custom design microarray with probes designed based on transcriptome sequencing. We used a newly developed calibration method to account for differences in individual probe binding behavior and to detect and remove probes unfit for analysis. Data stored as “normalized data” are normalized and quality filtered based on this new calibration method and normalized for interarray comparability by division by the 75%tile signal intensity for each array. Please refer to the accompanying publication (Czypionka et al. 2011.Transcriptome changes after genome wide admixture in invasive sculpins Molecular Ecology; no doi yet) for more information.
Project description:Genetic diversity and distribution differ between long-established and recently introduced populations in the invasive mosquito Aedes albopictus
Project description:European sculpins (Cottus) harbor an example of a recent hybrid speciation event, which entails the invasion of a new habitat by the hybrid species. We compare the transcriptomes of both parental species and the hybrid species to understand how they differ. F2 crosses between the parent species are compared to the hybrid species and its parent species to identify unique patterns of the hybrid species due to the initial hybridization process or respectively to other processes. See the accompanying publication (Czypionka et al. 2011.Transcriptome changes after genome wide admixture in invasive sculpins Molecular Ecology no doi yet) for more information.
Project description:Hybridization between Cottus rhenanus and C. perifretum has resulted in an evolutionary young hybrid lineage of invasive Cottus that has colonized a new habitat where the parental species are not found (Nolte et al. 2005; Proc. R. Soc. B 272: 2379–2387). This CGH array was designed to screen for copy number variation among Cottus species and to find gene duplicates that are unique to the hybrid lineage (see also Dennenmoser et al. 2017; Copy number increases of transposable elements and protein coding genes in an invasive fish of hybrid origin).
