Genetic Variation in Virulence among Chalkbrood Strains Infecting Honeybees
Author Information
Author(s): Vojvodic Svjetlana, Jensen Annette B., Markussen Bo, Eilenberg Jørgen, Boomsma Jacobus J.
Primary Institution: University of Copenhagen
Hypothesis
Do different strains of Ascosphaera apis differ in virulence when infecting honeybee larvae?
Conclusion
The study found significant variation in virulence among different strains of Ascosphaera apis, with some strains causing much higher mortality in honeybee larvae than others.
Supporting Evidence
- Strains from one clade caused 12-14% mortality while those from another clade induced 71-92% mortality.
- Larvae from one colony showed significantly higher susceptibility to chalkbrood infection than larvae from the other two colonies.
- The study confirms the existence of genetic variation in susceptibility across honeybee colonies.
Takeaway
Some types of chalkbrood fungus are much worse for honeybee larvae than others, which means beekeepers should pay attention to these differences.
Methodology
Honeybee larvae were infected with four strains of Ascosphaera apis under controlled laboratory conditions to assess mortality rates.
Limitations
The study was conducted in a controlled environment, which may not fully represent natural conditions.
Participant Demographics
Honeybee larvae from three different colonies were used in the study.
Statistical Information
P-Value
p<0.0001
Confidence Interval
95% CI
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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