1. Perspectives in the beekeeping value chain : innovationand development in the northern region of ColombiaJalelys L. Leones-Cerpa, Martha Cuenca Quicazán, Juan F. Restrepo, Katherine Velandia, Eduardo Sánchez-Tuirán, Karina A. Ojeda, 2024, original scientific article Abstract: Colombia and its regions have abundant botanical wealth and climatic conditions suitable for the development of beekeeping. The Caribbean region is promoting the practice of beekeeping as an activity with benefits to ecosystems, human health, and socioeconomic positioning. The objective of this research is to determine the state of beekeeping in the Colombian Caribbean region and the areas where it is necessary to make improvement actions. The methodology was carried out following bibliographic reviews in databases and government reports, and the surveys were applied through Google Forms. The main results showed the need for more regulations in beekeeping and derived products, the low development of value-added products in the Caribbean region, as well as few technologies for the management of apiaries and the genetic manipulation of bees. The surveys of beekeepers corroborated their perception of some of the areas in which the beekeeping sector requires research and development.
Keywords: Colombian Caribbean region, genetic improvement, honey, value-added products
Published in DKUM: 01.10.2024; Views: 0; Downloads: 4
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2. What has been done in the fight against Varroa destructor : from the past to the presentAleš Gregorc, Caio Eduardo da Costa Domingues, Hidayet Tutun, Sedat Sevin, 2022, review article Abstract: Bees are the major pollinators in natural ecosystems and in the agricultural production of several crops used for human consumption. However, they are exposed to multiple stressors that are causing a serious decline in their population. We highlight a major one among them, the Varroa destructor mite (Varroa) that causes severe impacts on the health of honey bee colonies, transmitting a variety of viruses that can affect the survival ability of individual bees and entire colonies. Diagnosis and mite control methods have been intensively studied in recent decades, with many studies in different areas of knowledge having been conducted. This overview summarizes these studies with a focus on colony defense systems, biological characteristics of the parasite Varroa, diagnostic methods used to establish the infestation level of colonies, and currently used control methods.
Keywords: diagnosis, honey bee disease, mite, parasite, Varroa destructor
Published in DKUM: 18.07.2024; Views: 151; Downloads: 10
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3. Complex population structure and haplotype patterns in the Western European honey bee from sequencing a large panel of haploid dronesDavid Wragg, Sonia E. Eynard, Benjamin Basso, Kamila Canale-Tabet, Emmanuelle Labarthe, Olivier Bouchez, Kaspar Bienefeld, Małgorzata Bieńkowska, Cecilia Costa, Aleš Gregorc, Per Kryger, Melanie Parejo, Alice M. Pinto, Jean-Pierre Bidanel, Bertrand Servin, Yves Le Conte, Alain Vignal, 2022, original scientific article Abstract: Honey bee subspecies originate from specific geographical areas in Africa, Europe and the Middle East, and beekeepers interested in specific phenotypes have imported genetic material to regions outside of the bees' original range for use either in pure lines or controlled crosses. Moreover, imported drones are present in the environment and mate naturally with queens from the local subspecies. The resulting admixture complicates population genetics analyses, and population stratification can be a major problem for association studies. To better understand Western European honey bee populations, we produced a whole genome sequence and single nucleotide polymorphism (SNP) genotype data set from 870 haploid drones and demonstrate its utility for the identification of nine genetic backgrounds and various degrees of admixture in a subset of 629 samples. Five backgrounds identified correspond to subspecies, two to isolated populations on islands and two to managed populations. We also highlight several large haplotype blocks, some of which coincide with the position of centromeres. The largest is 3.6 Mb long and represents 21% of chromosome 11, with two major haplotypes corresponding to the two dominant genetic backgrounds identified. This large naturally phased data set is available as a single vcf file that can now serve as a reference for subsequent populations genomics studies in the honey bee, such as (i) selecting individuals of verified homogeneous genetic backgrounds as references, (ii) imputing genotypes from a lower-density data set generated by an SNP-chip or by low-pass sequencing, or (iii) selecting SNPs compatible with the requirements of genotyping chips.
Keywords: genome, haplotype, honey bee, population genetics, SNP
Published in DKUM: 08.07.2024; Views: 109; Downloads: 9
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4. Virus prevalence in egg samples collected from naturally selected and traditionally managed honey bee colonies across EuropeDavid Claeys Bouuaert, Lina De Smet, Marleen Brunain, Bjørn Dahle, Tjeerd Blacquière, Anne Dalmon, Daniel S. Dezmirean, Dylan Elen, Janja Filipi, Alexandru Giurgiu, Aleš Gregorc, 2022, original scientific article Abstract: Monitoring virus infections can be an important selection tool in honey bee breeding. A recent study pointed towards an association between the virus-free status of eggs and an increased virus resistance to deformed wing virus (DWV) at the colony level. In this study, eggs from both naturally surviving and traditionally managed colonies from across Europe were screened for the prevalence of different viruses. Screenings were performed using the phenotyping protocol of the ‘suppressed in ovo virus infection’ trait but with qPCR instead of end-point PCR and a primer set that covers all DWV genotypes. Of the 213 screened samples, 109 were infected with DWV, 54 were infected with black queen cell virus (BQCV), 3 were infected with the sacbrood virus, and 2 were infected with the acute bee paralyses virus. It was demonstrated that incidences of the vertical transmission of DWV were more frequent in naturally surviving than in traditionally managed colonies, although the virus loads in the eggs remained the same. When comparing virus infections with queen age, older queens showed significantly lower infection loads of DWV in both traditionally managed and naturally surviving colonies, as well as reduced DWV infection frequencies in traditionally managed colonies. We determined that the detection frequencies of DWV and BQCV in honey bee eggs were lower in samples obtained in the spring than in those collected in the summer, indicating that vertical transmission may be lower in spring. Together, these patterns in vertical transmission show that honey bee queens have the potential to reduce the degree of vertical transmission over time.
Keywords: honey bee, suppressed in ovo virus infection, vertical transmission, virus resistance
Published in DKUM: 18.08.2023; Views: 457; Downloads: 47
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5. Supplementary material for paper COLOSS survey: global impact of COVID-19 on bee researchRaffaele Dall'Olio, Tjeerd Blacquière, Maria Bouga, Robert Brodschneider, Norman L. Carreck, Panuwan Chantawannakul, Vincent Dietemann, Lotta Fabricius Kristiansen, Anna M. Gajda, Aleš Gregorc, Asli Ozkirim, Christian Pirk, Victoria Soroker, Geoffrey R. Williams, Peter Neumann, 2020, complete scientific database of research data Keywords: COLOSS, Apis mellifera, coronavirus, COVID-19, honey bee, pandemic, research, extension
Published in DKUM: 19.11.2020; Views: 5533; Downloads: 131
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6. COLOSS survey: global impact of COVID-19 on bee researchRaffaele Dall’Olio, Tjeerd Blacquiere, Maria Bouga, Robert Brodschneider, Norman L Carreck, Panuwan Chantawannakul, Vincent Dietemann, Lotta Fabricius Kristiansen, Anna M. Gajda, Aleš Gregorc, Asli Ozkirim, Christian Pirk, Victoria Soroker, Geoffrey R. Williams, Peter Neumann, review article Abstract: The socio-economic impacts of COVID-19 on society have yet to be truly revealed; there is no doubt that the pandemic has severely affected the daily lives of most of humanity. It is to be expected that the research activities of scientists could be impacted to varying degrees, but no data exist on how COVID-19 has affected research specifically. Here, we show that the still ongoing COVID-19 pandemic has already diversely and negatively affected bee research at a global level. An online survey disseminated through the global COLOSS honey bee research association showed that every participant (n = 230 from 56 countries) reported an impact on one or more of their activities. Activities that require travelling or the physical presence of people (meetings and conferences, teaching and extension) were affected the most, but also laboratory and field activities, daily operations, supervision and other activities were affected to varying degrees. Since the basic activities are very similar for many research fields, it appears as if our findings for bee research can be extrapolated to other fields. In the light of our data, we recommend that stakeholders such as governments and funding bodies who support research should facilitate the wide implementation of web-based information technology required for efficient online communication for research and education, as well as adequately loosened restriction measures with respect to field and laboratory work. Finally, increased flexibility in administration and extension of research grants and fellowships seem to be needed. It is apparent that adequate responses by all stakeholders are required to limit the impact of COVID-19 and future pandemics on bee science and other research fields.
Keywords: COLOSS, Apis mellifera, coronavirus, COVID-19, honey bee, pandemic, research, extension
Published in DKUM: 12.11.2020; Views: 1029; Downloads: 208
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7. Comparison of the two microsporidia that infect honey bees : a reviewMateja Soklič, Aleš Gregorc, review article Abstract: Two microsporidian species, Nosema apis and Nosema ceranae, infect honey bees (Apis mellifera) worldwide. They are obligate intracellular parasites that multiply in the epithelial lining of the bee’s midgut and cause nosemosis. N. ceranae infections were primarily found in Apis cerana and raised interest in the last decade with the discovery of their presence in the European honey bee (Apis mellifera). Nosema spp. utilizes hosts’ energetic reserves for the purpose of propagation and disrupts the digestive processes of the bee. Nosemosis reduces the lifespan of a single bee and affects the performance of the colony. It also has an economic impact through the reduction in the honey and pollen yield of severely infected colonies or even causes them to collapse. Lack of effective therapy for nosemosis is of special concern and calls for scientific attention. Although N. ceranae and N. apis are similar in many aspects, there are important differences between them such as clinical signs of infection or the ability to resist low temperatures.
Keywords: Nosema ceranae, Nosema apis, Honey bee, Microsporidia
Published in DKUM: 14.11.2017; Views: 1268; Downloads: 234
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