scholarly journals Correlation of morphologic and production traits of honey bee colonies from Serbia

2011 ◽  
Vol 27 (4) ◽  
pp. 1761-1769
Author(s):  
G. Jevtic ◽  
B. Andjelkovic ◽  
Z. Lugic ◽  
D. Djokic ◽  
M. Mladenovic ◽  
...  
Keyword(s):  
Honey Bee ◽  
Morphological Traits ◽  
First Generation ◽  
Second Generation ◽  
Correlation Coefficients ◽  
Reciprocal Relationship ◽  
Production Traits ◽  
In The Beginning ◽  
Bee Colonies ◽  
Honey Yield

State of mutual or reciprocal relationship between traits is determined by the correlation coefficients. Correlation of morphological and production traits was determined in two generations of honey bee colonies. In the first generation, mother queen bees were studied, and in the second generation, their offspring. The study of one generation lasted two years. Morphological traits were determined in the beginning of the study and production traits were determined in the spring and autumn inspections of every year. In the first generation, the positive and mostly high correlation between morphological traits, and honey yield and hygienic behavior was determined. Correlation of morphological traits, colony strength and food supplies per colony ranged from highly positive to slightly negative values. It was found that there was a high correlation between some production traits (colony strength in the spring and autumn inspections and honey yield per colony). In the analysis of offspring (second generation), most traits that were positively correlated in mother generation now, also, showed a similar relationship. The only difference, in contrast to mother generation, was that, for most traits, the intensity of interaction increased.

Honey yield of different commercial apiaries treated with Lactobacillus salivarius A3iob, a new bee-probiotic strain

2018 ◽  
Vol 9 (2) ◽  
pp. 291-298 ◽  
Author(s):  
M. Novicov Fanciotti ◽  
M. Tejerina ◽  
M.R. Benítez-Ahrendts ◽  
M.C. Audisio
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Probiotic Strain ◽  
Control Group ◽  
Unexpected Result ◽  
Lactobacillus Salivarius ◽  
The Impact ◽  
Bee Colonies ◽  
North Western ◽  
Honey Yield

The main objective of this study was to determine the impact of Lactobacillus salivarius A3iob, a honey bee gut-associated strain (GenBank code access KX198010), on honey yield. Independent assays were conducted from May to September 2014 and 2015, in three commercial apiaries: Tilquiza, El Carmen and Yala, all located in north-western Argentina. Local Apis mellifera L. bees were kept in standard Langstroth hives; treated hives were fed once a month with 1×105 cfu/ml viable Lactobacillus cells, administered to the bees through a Doolittle-type feeder in 125 g/l sucrose syrup. Control hives were only given the syrup mixed with MRS sterile broth. The main honey harvest was done in December in all groups and we found that there was an overall increase in honey yield from the treated hives. In 2014, all treated hives produced between 2.3 to 6.5 times more honey than the controls. However, in 2015, higher honey average yields in the treated hives at El Carmen and Yala were obtained, yet not at Tilquiza, because of a slight mishap. They experienced the swarming of several bee colonies due to a higher number of bees without appropriate management, which caused the control group to yield more honey compared to the hives fed with Lactobacillus. Interestingly, at El Carmen, two honey harvests were recorded: one in winter and another in summer (July and December 2015, respectively). This unexpected result arose from the particular flora of the region, mainly Tithonia tubaeformis, which blooms in winter. L. salivarius A3iob cells prove to be a natural alternative that will positively impact the beekeepers’ economy by providing a higher honey yield.

Inheritance of sunflower (Hellianthus annuus L.) seed size in the cross combination L12B х KP11B

2018 ◽  
pp. 21-29
Keyword(s):  
First Generation ◽  
Second Generation ◽  
Correlation Coefficients ◽  
Cross Combination ◽  
Seed Length ◽  
Hybrid Plants ◽  
Significant Difference ◽  
Complementary Interactions ◽  
First And Second Generation ◽  
Selection Of

One of the main parameters in sunflower breeding is the size of seeds. Usually in breeding selections for this purpose is used an indicator of weight of 1000 seeds. It is necessary to know type of inheritance of the size of seeds expressed both in weight of 1000 seeds and in their sizes for selection of parental components at heterosis selection. At the same time, the genetics of these features have been studied much less than other economic features. The aim of the study was to determine the type of inheritance in the first and second generation of signs of weight of 1000 seeds and seed length in combination with crossing lines with conventional round and large long seeds. Comparison of parent lines by weight of 1000 seeds using student's test indicates a significant difference. The second generation offspring were divided into 16 classes. The plants of the first and second generation along with the parent lines were distributed by weight of 1000 seeds. There were measured 68 plants of L12B, 160 plants of KP11B, 25 hybrid plants of the first generation, two progeny of the hybrids of the second generation of 70 and 57 plants. The smallest weight of 1000 seeds of the KP11B line was 85 g, and L12B had the largest 65 g. We assumed three possible ratios of cleavages for digenic control of the trait: 9:6:1, 12:3:1, 15:1. The digenic model was chosen because of the small number of plants of the second generation corresponding to one of the parents. According to the obtained Pearson criteria on the basis of the weight of 1000 seeds, the hypothesis of the digenic recessive control of a smaller weight of 1000 seeds can be unambiguously confirmed – the ratio of 15:1. In our populations of the second generation high correlation coefficients between the signs of weight of 1000 seeds and length of seeds were revealed: 0.66 and 0.68. On the basis of the length of the seeds, the same measurement of each plant of parent lines and hybrids was carried out. The model of splitting 15:1 was reliable for both offspring and their sum when referring to a smaller part of plants with a small seed length, as in the L12B line. Also reliable in all variants was the ratio of 9:6:1 – with the release of the plant class of the second parent line KP11B. It shows differences about control of the length of the achenes of lines KP11B and L12B. Dominant alleles cause a greater length of the achenes. Genes have complementary interactions.

Key management practices to prevent high infestation levels of Varroa destructor in honey bee colonies at the beginning of the honey yield season

2016 ◽  
Vol 131 ◽  
pp. 95-102 ◽  
Author(s):  
Agostina Giacobino ◽  
Ana Molineri ◽  
Natalia Bulacio Cagnolo ◽  
Julieta Merke ◽  
Emanuel Orellano ◽  
...  
Keyword(s):  
Honey Bee ◽  
Varroa Destructor ◽  
Key Management ◽  
Management Practices ◽  
Bee Colonies ◽  
Honey Yield

scholarly journals Study the correlation of morphological and production traits of honey bee (Apis mellifera L.) (Review

2014 ◽  
pp. 61-65
Author(s):  
Erika Péntek-Zakar ◽  
András Jávor ◽  
Szilvia Kusza
Keyword(s):  
Apis Mellifera ◽  
Environmental Factors ◽  
Honey Bee ◽  
Morphological Characteristics ◽  
Morphological Parameters ◽  
Production Traits ◽  
Morphological Differences ◽  
The Given ◽  
Honey Yield

There are several morphological differences among the honey bee subspecies, which proofs that they adapted different way to the environmental factors of the given area. Morphological observations are not the only way to separate subspecies, it is possible on their genetic speciality as well. The authors’s aim in this present study was to examine morphological characteristics of subspecies, furthermore looking for correlation between morphological parameters and honey yield. According to their results, among the most important parameters considered by Hungarian breeders, in the case of the native Apismelliferacarnica subspecies, the proboscis length could be the indirect tool for honey-productivity focused selection.

scholarly journals The Herbal Supplements NOZEMAT HERB® and NOZEMAT HERB PLUS®: An Alternative Therapy for N. ceranae Infection and Its Effects on Honey Bee Strength and Production Traits

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 234
Author(s):  
Rositsa Shumkova ◽  
Ralitsa Balkanska ◽  
Peter Hristov
Keyword(s):  
Honey Bee ◽  
Alternative Therapy ◽  
Holistic Approach ◽  
Post Treatment ◽  
Pcr Analysis ◽  
Production Traits ◽  
Herbal Supplements ◽  
Pests And Diseases ◽  
First Time ◽  
Bee Colonies

Honey bees (Apis mellifera L.) are the most effective pollinators for different crops and wild flowering plants, thus maintaining numerous ecosystems in the world. However, honey bee colonies often suffer from stress or even death due to various pests and diseases. Among the latter, nosemosis is considered to be one of the most common diseases, causing serious damage to beekeeping every year. Here, we present, for the first time, the effects from the application of the herbal supplements NOZEMAT HERB® (NH) and NOZEMAT HERB PLUS® (NHP) for treating N. ceranae infection and positively influencing the general development of honey bee colonies. To achieve this, in autumn 2019, 45 colonies were selected based on the presence of N. ceranae infections. The treatment was carried out for 11 months (August 2019–June 2020). All colonies were sampled pre- and post-treatment for the presence of N. ceranae by means of light microscopy and PCR analysis. The honey bee colonies’ performance and health were evaluated pre- and post-treatment. The obtained results have shown that both supplements have exhibited statistically significant biological activity against N. ceranae in infected apiaries. Considerable enhancement in the strength of honey bee colonies and the amount of sealed workers was observed just one month after the application of NH and NHP. Although the mechanisms of action of NH and NHP against N. ceranae infection are yet to be completely elucidated, our results suggest a new holistic approach as an alternative therapy to control nosemosis and to improve honey bee colonies’ performance and health.

Identification and Treatment of European Foulbrood in Honey Bee Colonies

EDIS ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 7
Author(s):  
Catherine M. Mueller ◽  
Cameron Jack ◽  
Ashley N. Mortensen ◽  
Jamie D. Ellis
Keyword(s):  
Honey Bee ◽  
Bacterial Disease ◽  
American Foulbrood ◽  
Fact Sheet ◽  
European Foulbrood ◽  
Bee Colonies ◽  
Honey Bee Larvae

European foulbrood is a bacterial disease that affects Western honey bee larvae. It is a concern to beekeepers everywhere, though it is less serious than American foulbrood because it does not form spores, which means that it can be treated. This 7-page fact sheet written by Catherine M. Mueller, Cameron J. Jack, Ashley N. Mortensen, and Jamie Ellis and published by the UF/IFAS Entomology and Nematology Department describes the disease and explains how to identify it to help beekeepers manage their colonies effectively and prevent the spread of both American and European foulbrood.https://edis.ifas.ufl.edu/in1272

Do remittances differ depending on migration pathway and length of stay?

2016 ◽  
Vol 1 (1) ◽  
pp. 105-118
Author(s):  
Anita Pugliese ◽  
Julie Ray ◽  
Neli Esipova
Keyword(s):  
Length Of Stay ◽  
First Generation ◽  
Second Generation ◽  
Global Analysis ◽  
Large Sample ◽  
Migration Pathway ◽  
First Generation Migrants ◽  
Second Generation Migrants

This paper reports the results from Gallup’s global analysis of the likelihood of first-generation migrants, second-generation migrants and the native-born to send financial help in the form of money or goods to others inside or outside their respective country of residence. The findings in this paper are based on more than 450,000 interviews conducted through Gallup’s World Poll in 157 countries in 2012, 2013 and 2014. The sample includes more than 26,000 first-generation migrants and more than 20,000 second-generation migrants. The large sample enables Gallup to analyze first-generation migrants by the duration of their stay in their adopted country and compare their remittance behaviors with second-generation migrants and the native-born.

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