Topic
Varroa sensitive hygiene
About: Varroa sensitive hygiene is a research topic. Over the lifetime, 714 publications have been published within this topic receiving 24928 citations. The topic is also known as: VSH.
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01 Jan 1990
2 citations
01 Jan 2007
TL;DR: The reproductive ability of varroa mites was determined approximately 240 h after cell sealing in worker brood from four Africanized honey bee (AHB) colonies and four hybrid (HF1) colonies.
Abstract: Varroa destructor is a worldwide ectoparasite of serious economic importance for beekeeping. Severe colony mortality is routine in parasitized European honey bees (EHB) colonies in Europe, Asia and North America. This study was carried out in Heredia, Costa Rica. The reproductive ability of varroa mites was determined approximately 240 h after cell sealing in worker brood from four Africanized honey bee (AHB) colonies and four hybrid (HF1) colonies. Several variables were measured for foundress female mites: fertility, production of a mature female mite, production of only immature offspring, production of only female or only male offspring and no reproduction at all. No significant differences were found between AHB and HF1 in the percentage of fertile foundress mites (X 2 = 3.66, P= 0.06), the percentage of foundress mites that produced mature female offspring (X 2 = 0.53, P= 0.47), and the percentage of
2 citations
TL;DR: An evaluation of the potential and limitations of selecting on decreased mite reproduction traits to obtain V. destructor-resistant honeybee colonies and a refined nomenclature is proposed to allow for a more precise implementation of such selection and output reporting.
Abstract: Abstract The invasive parasitic mite, Varroa destructor (Anderson and Trueman), is the major biotic threat to the survival of European honey bees, Apis mellifera L. To improve colony survival against V. destructor, the selection of resistant lineages against this parasite is considered a sustainable solution. Among selected traits, mite fertility and fecundity, often referred to as suppressed mite reproduction are increasingly used in breeding programmes. However, the current literature leaves some gaps in the assessment of the effectiveness of selecting these traits toward achieving resistance. In the population studied here, we show a low repeatability and reproducibility of mite fertility and fecundity phenotypes, as well as a low correlation of these traits with infestation rates of colonies. Phenotyping reliability could neither be improved by increasing the number of worker brood cells screened, nor by screening drone brood, which is highly attractive for the parasite and available early in the season, theoretically allowing a reduction of generation time and thus an acceleration of genetic progress in selected lineages. Our results provide an evaluation of the potential and limitations of selecting on decreased mite reproduction traits to obtain V. destructor-resistant honeybee colonies. To allow for a more precise implementation of such selection and output reporting, we propose a refined nomenclature by introducing the terms of decreased mite reproduction and reduced mite reproduction, depending on the extent of mite reproduction targeted. We also highlight the importance of ensuring accurate phenotyping ahead of initiating long-lasting selection programmes. Graphical Abstract
2 citations