Related Experiment Video
Updated: Jun 1, 2025
13:39
Protocol for Production of a Genetic Cross of the Rodent Malaria Parasites
Published on: January 3, 2011
15.1K
A generalist vector-transmitted parasite exhibits population genetic structure among host genera
Vincenzo A Ellis1, Mélanie Duc2, Arif Ciloglu3,4
1Department of Entomology and Wildlife Ecology, University of Delaware, Newark, DE, USA.
Parasitology
|January 21, 2025
Summary
Generalist parasites like Haemoproteus majoris show genetic differences between bird host species, even within a single location. This suggests host-specific adaptations can arise despite transmission across multiple hosts.
Area of Science:
- Parasitology
- Evolutionary Biology
- Population Genetics
Background:
- Generalist parasites face diverse selective pressures from multiple hosts.
- Understanding host-specific adaptations in parasites with broad host ranges is challenging.
- Parasite transmission among host species may impact population genetic structure.
Purpose of the Study:
- To investigate the population genetic structure of the avian haemosporidian parasite Haemoproteus majoris (lineage WW2).
- To determine if host species influence parasite genetic differentiation within a single geographic site.
- To explore potential host-specific adaptations in a generalist parasite.
Main Methods:
- Sequencing of 1.13 Mbp of the Haemoproteus majoris genome from 34 infections across 10 host species.
- Utilizing sequence capture protocols to identify 1399 variable sites.
- Employing principal components analysis and analysis of molecular variance (AMOVA) to assess genetic structure.
Main Results:
- Parasite infections from Phylloscopus and Sylvia genera largely separated in principal component analysis.
- Significant genetic variation was detected among host genera, but not among species within genera.
- Genetic differentiation was observed at specific genomic sites, some coding for amino acid changes.
Conclusions:
- Vector-transmitted parasites can exhibit population differentiation among host species even in a single location.
- Host genera appear to be a significant factor in structuring parasite populations.
- Further research is needed to elucidate the mechanisms driving this genetic population structure.
Related Concept Videos
02:18Types of Genetic Transfer Between Organisms
27.0K
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
27.0K
01:25What is Population Genetics?
57.4K
A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
57.4K
00:58Symbiosis
27.4K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
27.4K
01:09Mutation, Gene Flow, and Genetic Drift
58.0K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
58.0K
02:39Gene Flow
34.7K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
34.7K