Population structure of a vector‐borne plant parasite

  title={Population structure of a vector‐borne plant parasite},
  author={Kelsey M Yule and J. A. Koop and N. Alexandre and Lauren R Johnston and N. Whiteman},
  journal={Molecular Ecology},
Parasites are among the most diverse groups of life on Earth, yet complex natural histories often preclude studies of their speciation processes. The biology of parasitic plants facilitates in situ collection of data on both genetic structure and the mechanisms responsible for that structure. Here, we studied the role of mating, dispersal and establishment in host race formation of a parasitic plant. We investigated the population genetics of a vector‐borne desert mistletoe (Phoradendron… Expand
The influence of climatic niche preferences on the population genetic structure of a mistletoe species complex.
Evaluating the factors associated with population differentiation in mistletoes of the Psittacanthus schiedeanus complex in Mexico considers this to be part of a more comprehensive ecological model of mistletoe host-race formation that incorporates the effects of climatic niche evolution. Expand
Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
The observed genetic and geographic patterns suggest that these Psittacanthus populations could have entered a distinct evolutionary pathway, and provides evidence for highlights on the importance of the Pleistocene climate changes, habitat differences, and potential host shifts in the evolutionary history of Neotropical mistletoes. Expand
Association of putatively adaptive genetic variation with climatic variables differs between a parasite and its host
Temperature was relatively more important in predicting allelic turnover in the specialist mistletoe while precipitation was more important for the host, suggesting that parasitic plants and host species may respond differently to selective pressures, potentially as a result of differing nutrient acquisition strategies. Expand
Reproductive ecology of a parasitic plant differs by host species: vector interactions and the maintenance of host races
Comparing mistletoe populations on mesquite and another common host species for which genetically distinct host races are known, strong but asymmetric pre-zygotic isolating barriers between mistletoes on the two hosts are estimated. Expand
Intraspecific competition for host resources in a parasite
It is found that intraspecific competition exists for xylem resources between mistletoe individuals, including host carbon, and that Mistletoe co-infections might attenuate virulence to maintain access to resources in particularly stressful ecological environments. Expand
Uncorrelated mistletoe infection patterns and mating success with local host specialization in Psittacanthus calyculatus (Loranthaceae)
Evaluated host adaptation is evaluated by describing the local patterns of infection (prevalence and intensity) of P. calyculatus mistletoes on three native host tree species and one introduced species and carried out cross-pollination experiments to examine how pollination affects infection patterns of different host species. Expand
Genetic differentiation among Psittacanthus rhynchanthus (Loranthaceae) populations: novel phylogeographic patterns in the Mesoamerican tropical lowlands
This study analyses the distribution, expansion and colonization patterns, and genetic differentiation among Psittacanthus rhynchanthus populations in Mesoamerica and suggests that Pleistocene expansion of suitable habitat, environmental segregation, and, perhaps host shifts, have acted as the isolation mechanisms between the two lineages. Expand
Unravelling host-mediated effects on hemiparasitic Mexican mistletoe Psittacanthus calyculatus (DC.) G. Don traits linked to mutualisms with pollinators and seed dispersers
The effects of host species, study site and floral trait covariates affected significantly all fitness measures, indicating that mistletoes’ reproductive fitness is affected differently depending on the host species and their site of occurrence. Expand
Efficiency of an air curtain as an anti-insect barrier: the honey bee as a model insect.
Results show that an air curtain operating at an airflow velocity of 7.5 m s-1 may prevent a strong flyer with high kinetic energy, such as the honey bee, from entering a building, and air curtains offer an alternative approach for combating vector-borne diseases. Expand


Population structure of a parasitic plant and its perennial host
There was no significant correlation between geographic and genetic distance (estimated as pairwise FST), either for the host or for the parasite, and host and parasite genetic distance matrices were uncorrelated, suggesting that sites with genetically similar host populations are unlikely to have genetically similar parasite populations. Expand
Host and parasite life history interplay to yield divergent population genetic structures in two ectoparasites living on the same bat species
It is suggested that although host and parasite life history interact to yield similar transmission patterns in both parasite species, the level of gene flow and eventual spatiotemporal genetic stability is differentially affected. Expand
Host races in plant-feeding insects and their importance in sympatric speciation.
  • M. Drès, J. Mallet
  • Biology, Medicine
  • Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 2002
This work provides verifiable criteria to distinguish host races from other biotypes, and discusses applications of an understanding of host races in conservation and in managing adaptation by pests to control strategies, including those involving biological control or transgenic parasite-resistant plants. Expand
The Diversity of Parasites
The emphasis for future research must shift from pattern description to the elucidation of the processes responsible for the structure and diversity of parasite faunas, and a better integration of ecological and historical approaches to the study of parasite diversity should make this objective possible. Expand
Co‐phylogeography and comparative population genetics of the threatened Galápagos hawk and three ectoparasite species: ecology shapes population histories within parasite communities
Comparative microevolutionary studies of multiple parasites occurring on a single host species suggest that the ischnoceran louse may yield insight into the cryptic evolutionary history of its endangered host, potentially aiding in its conservation management. Expand
Speciation by host switch in brood parasitic indigobirds
It is shown that all indigobird species are similar genetically, but are significantly differentiated in both mitochondrial haplotype and nuclear allele frequencies, which support a model of recent sympatric speciation. Expand
Evolutionary relationships, cospeciation, and host switching in avian malaria parasites.
Global assessments of the relationship between parasite and host phylogenetic trees, using Component and ParaFit, failed to detect significant cospeciation, suggesting parasite speciation may happen more often in conjunction with the acquisition of new hosts followed by divergent selection between host lineages in sympatry. Expand
Host Jumps and Radiation, Not Co‐Divergence Drives Diversification of Obligate Pathogens. A Case Study in Downy Mildews and Asteraceae
It is shown that phylogenies of Bremia and Asteraceae are significantly congruent, and maximum clade age estimation and sequence divergence comparison reveal that congruence is not due to long-term coevolution but rather due to host-shift driven speciation (pseudo-cospeciation). Expand
Coevolution between Lamellodiscus (Monogenea: Diplectanidae) and Sparidae (Teleostei): The Study Of a Complex Host‐Parasite System
Abstract.— Host‐parasite coevolution was studied between Sparidae (Teleostei) fishes and their parasites of the genus Lamellodiscus (Monogenea, Diplectanidae) in the northwestern Mediterranean Sea.Expand
Evolution in action: climate change, biodiversity dynamics and emerging infectious disease
  • E. Hoberg, D. Brooks
  • Biology, Medicine
  • Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2015
Ecological Fitting (EF) provides many opportunities for rapid host switching in changing environments, without the evolution of novel host-utilization capabilities, which fuel the expansion phase of the Oscillation Hypothesis of host range and speciation and the generation of novel combinations of interacting species within the Geographic Mosaic Theory of Coevolution. Expand