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Multiple benefits of breeding honey bees for hygienic behavior
Year:
2022
Source of publication :
Journal of Invertebrate Pathology
Authors :
Chejanovsky, Nor
;
.
Erez, Tal
;
.
Soroker, Victoria
;
.
Volume :
193
Co-Authors:

Tal Erez
Elad Bonda
Paz Kahanov
Olav Rueppell
Kaira Wagoner
Nor Chejanovsky
Victoria Soroker

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Honey bee colonies are prone to invasion by pests and pathogens. The combination of the parasitic mite Varroa destructor (Varroa) and the multiple viruses it vectors, is a major driver of colony losses. Breeding for hygienic behavior to reduce Varroa populations is considered a sustainable way to reduce the impact of Varroa on honey bee health. However, hygienic behavior may have a cost to the health of individual bees, both in terms of viral infection risk and immune function. To determine whether selection for hygienic behavior at the colony level is associated with trade-offs in honey bee viral infection and immune function, we compared Varroa populations, viral loads, and individual immune function between honey bee colonies that were bred for high and low hygienic behavior. Specifically, we measured Varroa infestation, Deformed wing virus DWV-A, DWV-B, Acute bee paralysis virus (ABPV), and Israeli acute paralysis virus IAPV viral genome levels in bee samples from artificially inseminated queens in our bi-directional selection program for hygienic behavior in Israel. In addition, we evaluated the expression of 12 genes from the Jak-STAT, Toll, IMD and RNAi immune pathways. We found significantly lower Varroa infestation and DWV loads in highly hygienic colonies than in colonies exhibiting low hygienic behavior. In addition, workers of the hygienic colonies had significantly higher expression of the immune genes PGRP-S2 and hymenoptaecin compared to workers from low hygienic colonies. These results indicate no trade-offs in breeding for hygienic behavior. Hygienic honey bees were associated with reduced Varroa populations and reduced DWV prevalence or load at the colony level. Individual immunity of hygienic bees was increased, which could also contribute to lower virus levels, although lower Varroa levels due to social immunity presumably contributed as well. In sum, we demonstrate multiple health benefits of breeding for honey bee hygiene.

Note:
Related Files :
Acute paralysis virus
deformed wing virus
IMD pathway
Individual immunity
selective breeding
Toll pathway
Varroa
Show More
Related Content
More details
DOI :
10.1016/j.jip.2022.107788
Article number:
107788
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
60776
Last updated date:
31/07/2022 17:14
Creation date:
31/07/2022 16:57
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Scientific Publication
Multiple benefits of breeding honey bees for hygienic behavior
193

Tal Erez
Elad Bonda
Paz Kahanov
Olav Rueppell
Kaira Wagoner
Nor Chejanovsky
Victoria Soroker

Multiple benefits of breeding honey bees for hygienic behavior

Honey bee colonies are prone to invasion by pests and pathogens. The combination of the parasitic mite Varroa destructor (Varroa) and the multiple viruses it vectors, is a major driver of colony losses. Breeding for hygienic behavior to reduce Varroa populations is considered a sustainable way to reduce the impact of Varroa on honey bee health. However, hygienic behavior may have a cost to the health of individual bees, both in terms of viral infection risk and immune function. To determine whether selection for hygienic behavior at the colony level is associated with trade-offs in honey bee viral infection and immune function, we compared Varroa populations, viral loads, and individual immune function between honey bee colonies that were bred for high and low hygienic behavior. Specifically, we measured Varroa infestation, Deformed wing virus DWV-A, DWV-B, Acute bee paralysis virus (ABPV), and Israeli acute paralysis virus IAPV viral genome levels in bee samples from artificially inseminated queens in our bi-directional selection program for hygienic behavior in Israel. In addition, we evaluated the expression of 12 genes from the Jak-STAT, Toll, IMD and RNAi immune pathways. We found significantly lower Varroa infestation and DWV loads in highly hygienic colonies than in colonies exhibiting low hygienic behavior. In addition, workers of the hygienic colonies had significantly higher expression of the immune genes PGRP-S2 and hymenoptaecin compared to workers from low hygienic colonies. These results indicate no trade-offs in breeding for hygienic behavior. Hygienic honey bees were associated with reduced Varroa populations and reduced DWV prevalence or load at the colony level. Individual immunity of hygienic bees was increased, which could also contribute to lower virus levels, although lower Varroa levels due to social immunity presumably contributed as well. In sum, we demonstrate multiple health benefits of breeding for honey bee hygiene.

Scientific Publication
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