Related Experiment Video
Updated: Jul 14, 2026
09:38
Site-Directed φC31-Mediated Integration and Cassette Exchange in Anopheles Vectors of Malaria
Published on: February 2, 2021
Genetic exchange and sub-structuring in Theileria annulata populations
William Weir1, Leila Ben-Miled, Tülin Karagenç
1Parasitology Group, Division of Infection and Immunity, Institute of Comparative Medicine, Glasgow University Veterinary School, Bearsden Road, Glasgow G61 1QH, UK. w.weir@vet.gla.ac.uk
Molecular and Biochemical Parasitology
|June 2, 2007
Summary
Genetic diversity in Theileria annulata, a cattle parasite, was analyzed using new genetic markers. High diversity exists within and between countries, with populations structured geographically, impacting control strategies for tropical theileriosis.
Area of Science:
- Veterinary Parasitology
- Population Genetics
- Molecular Biology
Background:
- Tropical theileriosis, caused by Theileria annulata, significantly impacts cattle health globally.
- Understanding parasite genetic diversity is crucial for effective control strategy development.
- The T. annulata genome sequence enables the creation of novel genetic markers.
Purpose of the Study:
- To develop and utilize a panel of genetic markers to investigate Theileria annulata population structure.
- To quantify genetic variation within and between T. annulata isolates from different geographical regions.
- To assess the genetic exchange and population structure of T. annulata.
Main Methods:
- Bioinformatic analysis of the T. annulata genome to identify microsatellite loci.
- PCR amplification and characterization of polymorphic markers from diverse parasite stocks.
- Genotyping of cloned and uncloned T. annulata isolates using a panel of 10 polymorphic markers.
- Population genetic analysis including F(ST), Nei's genetic distance, and linkage disequilibrium.
Main Results:
- A panel of 10 polymorphic microsatellite markers was developed for T. annulata.
- High genotypic diversity was observed within and between geographical populations.
- Parasite populations exhibit significant geographical sub-structuring, correlating with distance.
- Linkage disequilibrium was detected overall, but linkage equilibrium was found in Tunisian isolates.
Conclusions:
- The developed genetic markers are effective for studying T. annulata population genetics.
- Significant genetic diversity and geographical structure in T. annulata populations necessitate tailored control strategies.
- Further research into genetic exchange mechanisms is warranted to understand parasite population dynamics.
Related Concept Videos
01:09Mutation, Gene Flow, and Genetic Drift
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).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...
02:39Gene Flow
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
02:18Types of Genetic Transfer Between Organisms
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.
02:18Types of Genetic Transfer Between Organisms
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.