Ecological specialization correlates with genotypic differentiation in sympatric host-populations of the pea aphid. Effects of contemporary agricultural land cover on Colorado potato beetle genetic differentiation in the Columbia Basin and Central Sands. Contrasting population structure and demographic history of cereal aphids in different environmental and agricultural landscapes. Morales-Hojas R., Sun J., Iraizoz F.A., Tan X., Chen J.
Understanding Farmscapes and Their Potential for Improving IPM Programs. Butterflies and Plants: A Study in Coevolution.
These population structuring effects are useful for delineating the spatial scale at which whiteflies must be managed and predicting the speed at which alleles associated with insecticide resistance might spread.īemisia tabaci farmscape genetic diversity microsatellite markers population genetics.Įhrlich P.R., Raven P.H. Frequent whitefly population explosions driven by a single or a few major whitefly-suitable hosts planted on a wide spatial scale may be the key factor behind the persistence of a single panmictic population over Georgia's farmscapes. tabaci MEAM1 populations among farmscapes in Georgia. Overall, our results suggest that there is a high level of gene flow among B. tabaci MEAM1 (microsatellite data) revealed only minimal genetic differences among collected populations within and among farmscapes. Population genetics analyses (AMOVA, PCA and STRUCTURE) of B. tabaci MEAM1 haplotype across farmscapes in Georgia. Analysis of 102 mtCOI sequences revealed the presence of a single B. tabaci MED, Dialeurodes citri, Trialeurodes abutiloneus, T. Based on morphological features and mtCOI sequences, five species/cryptic species of whiteflies ( B. Thirty-five populations of adult whiteflies on row and vegetable crops and weeds across major agricultural regions of Georgia were collected from fifteen farmscapes. tabaci MEAM1 colonizing different plant species at a farmscape level in Georgia, United States. In this study, mitochondrial COI gene (mtCOI) sequences and six microsatellite markers were used to examine the population structure of B. A farmscape in this study is defined as heterogenous habitat with crop and non-crop areas spanning ~8 square kilometers.
tabaci could potentially influence their population structure, but this has not been assessed at a farmscape level. The diversity of agroecosystems invaded by B. Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED) are the two most invasive members of the B. Bemisia tabaci is a whitefly species complex comprising important phloem feeding insect pests and plant virus vectors of many agricultural crops.
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