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Academic literature on the topic 'Qfly'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Qfly"

1

Kean, J. M. "Modelling winter survival mating and trapping of Queensland fruit fly in Auckland New Zealand." New Zealand Plant Protection 69 (January 8, 2016): 153–59. http://dx.doi.org/10.30843/nzpp.2016.69.5896.

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In February 2015 an established population of the Queensland fruit fly (Qfly Bactrocera tryoni) was detected in Grey Lynn Auckland It was questionable whether Qfly might successfully overwinter in Auckland and how trap efficacy and mating behaviour would be affected by winter conditions During the official biosecurity response to eradicate Qfly these questions were addressed using published Qfly models that had been developed and parameterised from biological data from its native range A model for cold acclimatisation suggested that Auckland winters would not be sufficiently cold to cause significant mortality of adult Qfly but substantial cold mortality might occur in more southern locations The temperature requirement for mating suggested mating would be relatively rare from June to October and two models for relative trap efficacy suggested that traps would be relatively ineffective until late spring (OctoberNovember) The Ministry for Primary Industrys biosecurity response was successful with no detection of Qfly after March 2015 and eradication formally declared in December 2015
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2

Majumder, Rajib, Phillip W. Taylor, and Toni A. Chapman. "Dynamics of the Queensland Fruit Fly Microbiome through the Transition from Nature to an Established Laboratory Colony." Microorganisms 10, no. 2 (January 26, 2022): 291. http://dx.doi.org/10.3390/microorganisms10020291.

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The transition from nature to laboratory or mass rearing can impose significant physiological and evolutionary impact on insects. The Queensland fruit fly (also known as ‘Qfly’), Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), is a serious economic pest that presents major challenges for horticulture industries in Australia. The sterile insect technique (SIT) is being developed to manage outbreaks in regions that remain free of Qfly and to suppress populations in regions where this species is endemic. The biology of Qfly is intimately connected to its microbiome. Therefore, changes in the microbiome that occur through domestication have implications for SIT. There are numerous studies of the microbiome in Qfly larvae and adults, but there is little information on how the microbiome changes as Qfly laboratory colonies are established. In this study, high-throughput Illumina sequencing was used to assess the Qfly microbiome in colonies reared from wild larvae, collected from fruit, for five generations, on a gel-based larval diet. Beta diversity analysis showed that the bacterial communities from Generation 5 (G5) clustered separately from earlier generations. At the genus level, bacterial communities were significantly different between the generations and mostly altered at G5. However, communities were found similar at phyla to family taxonomic levels. We observed high abundance of Morganella and Burkholderia at the genus level in the larval and pupal stages respectively at G5, but these were not detected in earlier generations. Overall, our findings demonstrate that the domestication process strongly affects the Qfly microbiome and prompts questions about the functional relationship between the Qfly and its microbiome, as well as implications for the performance of insects that have been domesticated and mass-reared for SIT programs.
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3

Maelzer, DA. "Fruit-Fly Outbreaks in Adelaide, Sa From 1948-49 to 1985-86 .2. The Phenology of Both Pestilent Species." Australian Journal of Zoology 38, no. 5 (1990): 555. http://dx.doi.org/10.1071/zo9900555.

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The pattern of occurrences of larvae and of trapped flies within outbreaks is different for Qfly, Dacus tryoni, and Medfly, Ceratitis capitata. For Qfly outbreaks, most flies are trapped before the first larva is found. In Medfly outbreaks, most if not all flies are usually trapped after the first larva is found. The difference is probably due to the higher efficiency of the Qfly trap. The phenology of each of the two species in Adelaide is similar to that in the areas where each is endemic, with peaks of fly catches and occurrences of larvae which mostly represent generations. For Qfly, the peaks of fly catches mostly correspond to those around Sydney, but there is no obvious spring (September-October) peak in Adelaide, possibly because of the very small total number of flies caught. For Medfly the peaks of fly catches are similar to those in Perth, except that only six flies have been caught between September and November. Medfly apparently has more generations per season in Adelaide than does Qfly, but the overall rate of increase of each species per season may be similar. Interceptions of infested fruit at road blocks suggest that there could be a single peak of
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4

Majumder, Rajib, Brodie Sutcliffe, Phillip W. Taylor, and Toni A. Chapman. "Microbiome of the Queensland Fruit Fly through Metamorphosis." Microorganisms 8, no. 6 (May 26, 2020): 795. http://dx.doi.org/10.3390/microorganisms8060795.

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Bactrocera tryoni (Froggatt) (Queensland fruit fly, or “Qfly”) is a highly polyphagous tephritid fruit fly and a serious economic pest in Australia. Qfly biology is intimately linked to the bacteria and fungi of its microbiome. While there are numerous studies of the microbiome in larvae and adults, the transition of the microbiome through the pupal stage remains unknown. To address this knowledge gap, we used high-throughput Next-Generation Sequencing (NGS) to examine microbial communities at each developmental stage in the Qfly life cycle, targeting the bacterial 16S rRNA and fungal ITS regions. We found that microbial communities were similar at the larval and pupal stage and were also similar between adult males and females, yet there were marked differences between the larval and adult stages. Specific bacterial and fungal taxa are present in the larvae and adults (fed hydrolyzed yeast with sugar) which is likely related to differences in nutritional biology of these life stages. We observed a significant abundance of the Acetobacteraceae at the family level, both in the larval and pupal stages. Conversely, Enterobacteriaceae was highly abundant (>80%) only in the adults. The majority of fungal taxa present in Qfly were yeasts or yeast-like fungi. In addition to elucidating changes in the microbiome through developmental stages, this study characterizes the Qfly microbiome present at the establishment of laboratory colonies as they enter the domestication process.
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5

Dominiak, B. C., L. J. McLeod, R. Landon, and H. I. Nicol. "Development of a low-cost pupal release strategy for Sterile Insect Technique (SIT) with Queensland fruit fly and assessment of climatic constraints for SIT in rural New South Wales." Australian Journal of Experimental Agriculture 40, no. 7 (2000): 1021. http://dx.doi.org/10.1071/ea99166.

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Sterile pupae of Queensland fruit fly (Qfly) Bactrocera tryoni (Froggatt) were released to suppress wild Qfly populations at 3 sites in New South Wales and to assess a pupal release strategy using the bed technique. Sterile pupae were released from September 1997 to June 1998 from sand and vermiculite beds. A total of 24.6 million pupae were released with a male recapture rate of 0.101% (not corrected for adult emergence rate). Adult emergence rates were 25% at Tullibigeal; 39% at Ungarie and 46, 41, 71 and 54% respectively at 4 locations at Lake Cargelligo (mean 46%). Corrected recapture rates using cue-lure traps were 0.88% at Tullibigeal, 0.08% at Ungarie and 0.15% at Lake Cargelligo (mean 0.21%). When wild fly populations increased at Lake Cargelligo, a bait spraying program was used which substaintially reduced the catches of both sterile and wild flies in traps. Analyses using the CLIMEX model showed that the climate at Lake Cargelligo town (with irrigation) was suitable for fruit flies. CLIMEX indicated that the unmodified rural environment was unsuitable for fruit fly survival due to a summer moisture deficit. The Meats daily survival rate decrement of 58–72% was similar to that found for some similar studies in Australia but lower than for certain other release programs. No significant bird or ant predation was observed.
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Castro-Vargas, Cynthia, Gunjan Pandey, Heng Lin Yeap, Michael J. Lacey, Siu Fai Lee, Soo J. Park, Phillip W. Taylor, and John G. Oakeshott. "Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)." PLOS ONE 17, no. 8 (August 24, 2022): e0273210. http://dx.doi.org/10.1371/journal.pone.0273210.

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Rectal gland volatiles are key mediators of sexual interactions in tephritid fruit flies. We used solid-phase microextraction (SPME) plus gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC-FID) to substantially expand rectal gland chemical characterisation of the Queensland fruit fly (Bactrocera tryoni (Diptera: Tephritidae); Qfly). The SPME GC-MS analysis identified 24 of the 30 compounds previously recorded from Qfly rectal glands, plus another 21 compounds that had not previously been reported. A few amides and fatty acid esters dominated the chromatograms of males and females respectively, but we also found other esters, alcohols and aldehydes and a ketone. The GC-FID analyses also revealed over 150 others, as yet unidentified, volatiles, generally in lesser amounts. The GC-FID analyses also showed 49 and 12 compounds were male- and female-specific, respectively, both in single sex (virgin) and mixed sex (mostly mated) groups. Another ten compounds were male-specific among virgins but undetected in mixed sex groups, and 29 were undetected in virgins but male-specific in mixed sex groups. The corresponding figures for females were four and zero, respectively. Most short retention time peaks (including a ketone and an ester) were male-specific, whereas most female-biased peaks (including five fatty acid esters) had long retention times. Our results indicate previously unsuspected diversity of rectal gland volatiles that might have pheromone functions in males, but far fewer in females.
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Meats, A. W., A. D. Clift, and M. K. Robson. "Incipient founder populations of Mediterranean and Queensland fruitflies in Australia: the relation of trap catch to infestation radius andmodels for quarantine radius." Australian Journal of Experimental Agriculture 43, no. 4 (2003): 397. http://dx.doi.org/10.1071/ea02070.

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We examined data from 75 infestations of the Mediterranean fruit fly (Medfly) and 286 of the Queensland fruit fly (Qfly) that have occurred in quarantined and normally fly-free zones in Australia from 1974 to 2000. The radius of occurrence of both adult male flies and infested fruit was almost always less than 1 km. The rare cases where there was an isolated occurrence beyond 1 km of an epicentre were most likely due to (and can be treated as) separate introductions. Our analysis shows that effective quarantine radii for suspension of fly-free status should be related to the number of flies trapped around the epicentre and the density of the trap array (if the appropriate code of practice is applied). Most detections of fruit flies involve the trapping of very few flies and 18% of Medfly infestations and 71% of Qfly infestations that are detected are not classified as outbreaks and are left to die out without any treatment. For each species, we have used 3 alternative methods to calculate confidence limits for infestation radii. The upper limits could also serve as quarantine radii. These limits increase with the rate of trapping of male flies and have a theoretical probability of 3/100 000 (i.e. probit 9) of being exceeded. The quarantine radii for most declared outbreaks, when calculated with any of our methods, would be small because the number of flies detected is usually only just above the threshold for such a declaration. If our methods were used for beneficial species or for re-introductions of endangered species, the lower confidence limits could be used to calculate the size of inoculum required for a high probability of initial establishment.
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8

Lee, Juho, Hyeonwoo Yeo, and Yong-Hoon Kim. "Quasi-Fermi level splitting in nanoscale junctions from ab initio." Proceedings of the National Academy of Sciences 117, no. 19 (April 23, 2020): 10142–48. http://dx.doi.org/10.1073/pnas.1921273117.

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The splitting of quasi-Fermi levels (QFLs) represents a key concept utilized to describe finite-bias operations of semiconductor devices, but its atomic-scale characterization remains a significant challenge. Herein, the nonequilibrium QFL or electrochemical potential profiles within single-molecule junctions obtained from the first-principles multispace constrained-search density-functional formalism are presented. Benchmarking the standard nonequilibrium Green’s function calculation results, it is first established that algorithmically the notion of separate electrode-originated nonlocal QFLs should be maintained within the channel region during self-consistent finite-bias electronic structure calculations. For the insulating hexandithiolate junction, the QFL profiles exhibit discontinuities at the left and right electrode interfaces and across the molecule the accompanying electrostatic potential drops linearly and Landauer residual-resistivity dipoles are uniformly distributed. For the conducting hexatrienedithiolate junction, on the other hand, the electrode QFLs penetrate into the channel region and produce split QFLs. With the highest occupied molecular orbital entering the bias window and becoming a good transport channel, the split QFLs are accompanied by the nonlinear electrostatic potential drop and asymmetric Landauer residual-resistivity dipole formation. Our findings underscore the importance of the first-principles extraction of QFLs in nanoscale junctions and point to a future direction for the computational design of next-generation semiconductor devices.
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9

Bux, Lal, Dalu Li, Muhammad Faheem, Nour Ali, Muzafar Hussain Sirohi, Mehtab Ali, Ali Nawaz Kumbhar, et al. "Detection of QTLs for Outcrossing-Related Traits in CSSL Population Derived from Primitive Japonica Accession Ludao in the Genetic Background of O. sativa spp. Japonica Restorer C-bao Using RSTEP-LRT Method." Agronomy 10, no. 1 (December 23, 2019): 28. http://dx.doi.org/10.3390/agronomy10010028.

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The outcrossing traits in rice (Oryza sativa L.) affect the yield of hybrid seed production. Using a cytoplasmic male sterile (CMS) line with good outcrossing traits, such as short flag leaf length (FLL), narrow flag leaf width (FLW), wide flag leaf angle (FLA), and elongated panicle neck length (PNL), for hybrid rice seed production, it is possible to avoid the procedure of cutting flag leaves and make the supplementary pollination feasible by machine. In this study, a japonica restorer C-bao as the receptor parent and a primitive japonica accession Ludao as the donor parent were used to construct a chromosome segment substitution line (CSSL) population. The CSSL population was used to detect quantitative trait loci (QTLs) for the four outcrossing traits using a likelihood ratio test based on the stepwise regression (RSTEP-LRT) method. The CSSL population constructed consisted of 163 lines covering 90.7% of the donor genome. Among the seven QTLs detected in the CSSL population, four QTLs were detected in both years. qFLL-4 explained 6.70% of the two-year-averaged phenotypic variance, and the alleles from Ludao decreased FLL 5.1 cm. qFLA-1.1 and qFLA-1.2 explained 7.85% and 21.29% of the 2-year-averaged phenotypic variance respectively, and the alleles from Ludao increased FLA 17.38° and 31.50°. qPNL-8 explained 8.87% of the 2-year-averaged phenotypic variance, and the alleles from Ludao increased PNL 4.44 cm. These favorable alleles identified could be used to improve the outcrossing traits of parents for hybrid rice seed production in rice.
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10

Usman, Mustofa, M. Komarudin, Munti Sarida, Wamiliana Wamiliana, Edwin Russel, Mahatma Kufepaksi, Iskandar Ali Alam, and Faiz A.M. Elfaki. "Analysis of Some Variable Energy Companies by Using VAR(p)-GARCH(r,s) Model : Study From Energy Companies of Qatar over the Years 2015–2022." International Journal of Energy Economics and Policy 12, no. 5 (September 27, 2022): 178–91. http://dx.doi.org/10.32479/ijeep.13333.

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In this study, the nature of the weekly stock price relationships of several Qatar energy companies, namely the weekly stock price of Qatar Fuel Company (QFLS), Qatar Gas Transport Company (QGTS), and Qatar Electricity and Water Company (QEWC), will be discussed. The duration of data weekly stock price is from January 2015 to April 2022. This study aimed to obtain the best model for the weekly stock price relationship of the three companies QFLS, QGTS, and QEWC. The multivariate time series analysis method will be used to evaluate the data. From the analysis using multivariate time series modeling, the best model is VAR(3)-GARCH)(1,1). Based on this best model, further analysis is carried out, namely Granger causality, impulse response function (IRF), and forecasting for the next 12 periods. The Granger causality test found that the QFLS has Granger causality on the QGTS (unidirectional), while the QGTS and QEWC variables have bidirectional Granger causality. The IRF analysis indicated that if there is a shock of 1 standard deviation in QFLS, then QFLS and QEWC will fluctuate for the first six weeks and move toward equilibrium from the seventh week onwards, while the impact on QGTS can be ignored. Suppose there is a shock of 1 standard deviation in the QGTS. In that case, the QFLS and QEWC will respond by fluctuating for the first six weeks, and at the seventh week and move toward equilibrium, while the impact on QGTS can be ignored; and if there is a shock of 1 standard deviation in QEWC, then QFLS and QEWC will respond negatively and fluctuating for the first six weeks, and at the seventh week toward equilibrium, while the impact on QGTS is negligible. Forecasting for the next 12 periods shows that the farther the forecasting period, the larger the standard error. This indicates that the ffarther the period is, the more unstable it is.
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Books on the topic "Qfly"

1

Brunken-Wegner, Hertha. QFL: Haben sie Filzläuse ? : die Erlebnisse einer ganz und gar unmilitärischen Nachrichtenhelferin bei der Reichsluftwaffe. Oldenbourg (Allemagne): Ziese Verlag, 1991.

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Québec (Province). Comité patronal de négociation des commissions pour catholiques. Agreement binding on the one hand, the Employer Bargaining Committee for Catholic School Boards, Catholic Confessional School Boards and Dissident School Boards for Catholics (CPNCC) and on the other hand, the Canadian Union of Public Employees (CUPE) affiliated with the Québec Federation of Labour (QFL) on behalf of the unions representing support staff employees of school boards for Catholics of Québec in accordance with the act respecting the process of negotiation of the collective agreements in the public and parapublic sectors (R.S.Q., chapter R-8.2). [Québec]: Comité patronal de négociation des commissions scolaires pour catholiques, 1996.

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Québec (Province). Comité patronal de négociation des commissions pour catholiques. Agreement binding on the one hand, the Employer Bargaining Committee for Catholic School Boards, Catholic Confessional School Boards and Dissident School Boards for Catholics (CPNCC) and, on the other hand, the Syndicat des employés et employées professionnels-les et de bureau, section locale 57, and the Syndicat des employés-es professionnels-les et de bureau, section locale 440 (SEPB), affiliated with the Québec Federation of Labour (QFL) on behalf of the unions representing the support staff employees of school boards for Catholics of Québec in accordances with the act respecting the process of negotiation of the collective agreements in the public and parapublic sectors (R.S.Q., chapter R-8.2). [Québec]: Comité patronal de négociation des commissions scolaires pour catholiques, 1996.

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Agreement binding on the one hand, the Employer Bargaining Committee for Catholic School Boards, Catholic Confessional School Boards and Dissident School Boards for Catholics (CPNCC) and on the other hand, the Union des employés et employés de service, section locale 800, affiliated with the Québec Federation of Labour (QFL) on behalf of the unions representing the support staff employees of School Boards for Catholics of Québec in accordance with the act respecting the process of negotiation on the collective agreement in the public and parapublic sectors (R.S.Q., chapter R-8.2). [Québec]: Comité patronal de négociation des commissions scolaires pour catholiques, 1996.

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Conference papers on the topic "Qfly"

1

Wolfertstetter, Fabian, Robin Fonk, Christoph Prahl, Marc Röger, Stefan Wilbert, and Jesús Fernández-Reche. "Airborne soiling measurements of entire solar fields with Qfly." In SOLARPACES 2019: International Conference on Concentrating Solar Power and Chemical Energy Systems. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0028968.

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"Calibrating a Jump-Diffusion Model of an endemic invasive: Metamodels, statistics and Qfly." In 19th International Congress on Modelling and Simulation. Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2011. http://dx.doi.org/10.36334/modsim.2011.e16.sadler.

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Borle, Shivani W., and Amol D. Potgantwar. "QFL for the Web Data Extraction from Multiple Data Sources." In 2015 International Conference on Computing Communication Control and automation(ICCUBEA). IEEE, 2015. http://dx.doi.org/10.1109/iccubea.2015.90.

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Lopez, Lidia, Alessandra Bagnato, Antonin Ahberve, and Xavier Franch. "QFL: Data-Driven Feedback Loop to Manage Quality in Agile Development." In 2021 IEEE/ACM 43rd International Conference on Software Engineering: Software Engineering in Society (ICSE-SEIS). IEEE, 2021. http://dx.doi.org/10.1109/icse-seis52602.2021.00015.

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