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Tesi sul tema "Insect nematodes Molecular genetics"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 29 gennaio 2023

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1

Pinyon, Rebecca A. "Isolation and characterisation of novel non-ribosomal peptide synthetase genes from the entomopathogenic Xenorhabdus bovienii T228." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09php659.pdf.

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2

Saeb, Amr. "Phylogenetic and population genetic studies on some insect and plant associated nematodes." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1158348092.

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3

Saeb, Amr T. M. "Phylogenetic and population genetic studies on some insect and plant associated nematodes." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158348092.

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4

Cameron, Janet. "An assessment of the use of molecular techniques in insect conservation." Thesis, Keele University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309765.

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5

Swasdipan, Nicharat. "Molecular-genetics of olfaction and its roles in social insect behaviour /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16457.pdf.

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6

Earp, David John. "Molecular genetics and biochemistry of mosquitocidal delta-endotoxins of Bacillus thuringiensis." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238652.

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7

Blackburn, Dana. "Virulence of Photorhabdus spp.: Examining the Roles of Environment, Evolution, and Genetics in Insect Mortality." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6163.

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Abstract (sommario):

Entomopathogenic nematodes (EPNs) (genera Heterorhabditis and Steinernema) kill their invertebrate hosts with the aid of a mutualistic bacterium. The bacteria (Xenorhabdus spp. for steinernematids and Photorhabdus spp. for heterorhabditids) are primarily responsible for killing the host and providing the nematodes with nutrition and defense against secondary invaders. Photorhabdus is a Gram-negative bacterium in the Enterobacteriaceae family with high virulence towards their insect hosts. To achieve high mortality rates Photorhabdus produces a variety of virulence factors such as toxins, lipas

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8

Beck, Markus Hans. "Molecular genetics of host manipulation and competition in an insect parasitoid system." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09ACP/09acpb393.pdf.

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Bibliography: leaves 108-128. Maternal protein secretions from the parthenogenetic endoparasitoid wasp Venturia canescens Gravenhorst (Hymenoptera: Ichneumonidae) were analysed regarding their ability to protect the parasitoid egg against the host immune system. These secretions include nucleic acid-free glycoproteins, called virus-like particles (VLPs) that are produced in the ovarian calyx gland. Results found that VLP-free calyx fluid has the ability to actively suppress host defence reactions, rather than VLPs on the egg surface being solely responsible for the protection of the egg. It wa

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9

Saunders, Robert David Comrie. "Molecular analysis of a female-sterile mutation in Drosophila melanogaster." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/12900.

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10

Wilkie, Hazel Evelyn. "Identifying and exploiting the molecular basis of resistance to gastro-intestinal nematodes in sheep." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/22920.

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Teladorsagia circumcincta is a common parasitic nematode of the sheep abomasum, causing reduced growth in young lambs. The widespread development of anthelmintic resistant parasites has driven the need for alternative control strategies. Resistant immunity is acquired through repeated exposure to the parasite. The immune response and clinical outcome vary greatly between animals, but resistance is heritable. The aims of this project were: 1) understand how sheep respond to nematode infection; 2) understand and identify genes associated with the response; 3) identify variation within those gene

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11

Bush, Elizabeth Rosina. "Molecular biology and expression of some ligand-gated ion channels from the nematodes Ascaris suum and Caenorhabditis elegans." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246225.

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12

Partridge, Frederick A. "Molecular genetic analysis of the caenorhabditis elegans gene bus-8." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670093.

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13

Hunt, Brendan G. "Molecular evolution in the social insects." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43655.

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Abstract (sommario):

Social insects are ecologically dominant because of their specialized, cooperative castes. Reproductive queens lay eggs, while workers take part in brood rearing, nest defense, and foraging. These cooperative castes are a prime example of phenotypic plasticity, whereby a single genetic code gives rise to variation in form and function based on environmental differences. Thus, social insects are well suited for studying mechanisms which give rise to and maintain phenotypic plasticity. At the molecular level, phenotypic plasticity coincides with the differential expression of genes. This d

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14

Vaid, Alka. "Application of molecular biological techniques to the study of Pasteuria penetrans, an obligate parasite of plant parasitic nematodes." Thesis, University of Greenwich, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286079.

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15

徐增富 and Zengfu Xu. "Proteinase inhibitor II from Solanum americanum, molecular characterization and potential use in generating insect-resistanttransgenic vegetables." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B30252453.

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16

Dhladhla, Busisiwe I. R. "Enumeration of insect viruses using microscopic and molecular analyses: South African isolate of cryotophlebia leucotreta granulovirus as a case study." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1008395.

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Abstract (sommario):

Baculoviruses have been used as biocontrol agents to control insect pests in agriculture since the 1970s. Out of the fifteen virus families known to infect insects, baculoviruses offer the greatest potential as insect biopesticides, due to their high host specificity which makes them extremely safe to humans, other vertebrates, plants and non-target microorganisms. They comprise of two genera: nucleopolyhedroviruses (NPVs) and granuloviruses (GVs). The South African isolate of Cryptophlebia leucotreta granulovirus (CrleGV-SA) which is infectious for the false codling moth (FCM), Thaumatotibia

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17

Viljakainen, L. (Lumi). "Evolutionary genetics of immunity and infection in social insects." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514289286.

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Abstract In social insects a major cost of social life is the high number of pathogens found in large societies and the greater likelihood of transmission of pathogens among closely related individuals. The aim of this thesis was to investigate the effect of high pathogen pressure on the molecular evolution of genes involved in the innate immune system in social insects. In addition, the transmission dynamics of the intracellular bacteria Wolbachia in wood ants was examined. By comparing DNA sequences from diverse species of ants and honeybees it was shown that the immune genes in hymenopteran

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18

Mahalak, Karley Kristine. "The role of the EGF pathway and sur-2/Med23 in vulval development of nematodes." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471593738.

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19

Florin, David A. "Morphometric and molecular analyses of the sand fly species Lutzomyia shannoni (Dyar 1929) (Diptera: Psychodidae: Phlebotiminae) collected from seven different geographical areas in the southeastern United States /." Download the dissertation in PDF, 2006. http://www.lrc.usuhs.mil/dissertations/pdf/Florin2006.pdf.

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20

Manivannan, Sathiya Narayanan. "TRANSCRIPTIONAL CONTROL OF AN ESSENTIAL RIBOZYME AND AN EGFR LIGAND REVEAL SIGNIFICANT EVENTS IN INSECT EVOLUTION." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437053490.

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21

Arruda, Ligia Hansen. "Caracterização estrutural da interação de serino proteinases de Spodoptera frugiperda (Lepidoptera: Noctuidae) e inibidores de proteinases de plantas." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-24052011-091301/.

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Abstract (sommario):

As plantas desenvolveram diferentes mecanismos para reduzir o ataque de insetos, incluindo compostos protéicos de defesa, como os inibidores de proteinases (IPs). Os insetos, ao longo da evolução, desenvolveram estratégias para superar as barreiras defensivas das plantas, permitindo a sua alimentação e desenvolvimento, como a super expressão de genes de enzimas digestivas sensíveis e insensíveis aos IPs de plantas. Uma das abordagens desse trabalho foi identificar novas serinoproteinases no intestino de lagartas de Spodoptera frugiperda. Duas novas quimotripsinas e trê novas tripsinas foram id

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22

Vendrami, Daniel Pagotto. "Estudos populacionais de Triatoma sordidae e Triatoma costalimai (Hemiptera:Reduviidae) baseado em marcadores mitocondriais e morfometria geométrica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/99/99131/tde-22122017-114847/.

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Triatoma sordida é considerada de importância secundária no ciclo da Doença de Chagas humana, uma vez que vem ocupando o lugar de Triatoma infestans no peri-domicílio das casas. Triatoma costalimai é considerada uma espécie silvestre e endêmica do cerrado brasileiro. Recentemente tem ocorrido um aumento do número de invasões domiciliares por T. sordida e T. costalimai, devido ao impacto causado pelo homem no meio ambiente. Ambas as espécies já foram encontradas naturalmente infectadas por Trypanosoma cruzi e, portanto, contribuem para o ciclo antropozoótico da doença. O presente trabalho teve

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23

Choe, Chong Pyo. "The role of pair-rule genes in Tribolium segmentation." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/209.

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24

Pinyon, Rebecca A. "Isolation and characterisation of novel non-ribosomal peptide synthetase genes from the entomopathogenic Xenorhabdus bovienii T228 / Rebecca A. Pinyon." Thesis, 2002. http://hdl.handle.net/2440/21756.

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25

Arefin, Md Badrul. "Molecular characterization of the Drosophila responses towards nematodes." Doctoral thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-134346.

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Abstract (sommario):

A sophisticated evolutionary conserved innate immune system has evolved in insects to fight pathogens and to restrict damage in harmful (danger) situations including cancer. A significant amount of knowledge about different infection models in Drosophila has been generated in past decades, which revealed functional resemblances and implications for vertebrate systems. However, how Drosophila responds towards multicellular parasitic nematodes and in danger situations is still little understood. Therefore, the aim of the thesis was to characterize multiple aspects of the host defense in the two

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26

Soobramoney, Lee-Anne Odelle. "The characterization and biological control potential of an endemic entomopathogenic nematode and its symbiotic bacterium through behavioural, molecular and genomic approaches." Thesis, 2016. http://hdl.handle.net/10539/21748.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. Johannesburg, 2016.<br>The entomopathogenic nematodes (EPNs) have emerged as an important group of insect pests. The EPNs which comprise the Steinernema genus share symbiotic associations with Xenorhabdus bacteria. This research project focused on isolating and characterizing a novel and indigenous EPN isolate with its associated bacteria. The biological control potential of the nematode was investigated in the areas of host i

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27

Beck, Markus Hans. "Molecular genetics of host manipulation and competition in an insect parasitoid system / by Markus Hans Beck." Thesis, 1998. http://hdl.handle.net/2440/14765.

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Abstract (sommario):

Bibliography: leaves 108-128.<br>ix, 128, [10] leaves, [32] leaves of plates : ill. (some col.) ; 30 cm.<br>Maternal protein secretions from the parthenogenetic endoparasitoid wasp Venturia canescens Gravenhorst (Hymenoptera: Ichneumonidae) were analysed regarding their ability to protect the parasitoid egg against the host immune system. These secretions include nucleic acid-free glycoproteins, called virus-like particles (VLPs) that are produced in the ovarian calyx gland. Results found that VLP-free calyx fluid has the ability to actively suppress host defence reactions, rather than VLPs on

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28

Chakraborty, Saikat. "Molecular Ecology of the Primitively Eusocial Wasp Ropalidia Marginata : Relatedness, Queen Succession and Population Genetics." Thesis, 2015. http://etd.iisc.ernet.in/2005/3676.

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Altruism is defined as a trait in an individual that increases some other individual’s fitness at the expense of her own. Therefore, existence of such traits in a population is an evolutionary paradox, as natural selection should eliminate such a trait. Extreme altruism in the form of eusociality where individuals relinquish their own reproduction to help raise other’s offspring has been an enigma in evolutionary biology since Darwin. Primitively eusocial organisms provide one with a unique system to study the evolution and maintenance of altruism as in these kind of species most of the indivi

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29

Rhoades, Paul Raymond. "Four Aspects of Dogwood Pollination: Insect Visitation, a Novel approach to Identify Pollen, Floral Volatile Emission, and Tracking Parentage." 2010. http://trace.tennessee.edu/utk_gradthes/744.

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Abstract (sommario):

Part 1: Visitation of potential pollinators to Cornus florida and C. kousa flowers was assessed in East Tennessee in 2008 and 2009. Data regarding insect visitation rates to multiple trees per location were gathered throughout the flowering period. Diurnal and seasonal variations in visitation were recorded. Pollen coverage was assessed on portions of captured insect exoskeletons that were most likely to contact the stigma. Eleven families in four insect orders were collected from C. florida and 26 families in five orders from C. kousa. The most important pollinators in eastern Tennessee w

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30

Sikhakhane, Thandeka Nokuthula. "Genetics of Russian wheat aphid (Diuraphis noxia) resistance in bread wheat (Triticum aestivum L.) accession CItr 2401." Diss., 2017. http://hdl.handle.net/10500/22961.

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Abstract (sommario):

The Russian wheat aphid (RWA) (Diuraphis noxia Kurdjumov) is one of the important insect pests of wheat (Triticum aestivum L.), barley (Hordeum vulgare L.) and other grasses. To date, there are four RWA biotypes identified in South Africa. The virulent biotypes emerged, partly due to climate change and new genetic variations within populations of RWA; hence there is a need to improve host-plant resistance, as an effective control measure. Bread wheat (Triticum aestivum L.) accession Cereal Introduction (CItr) 2401 is known to be resistant to all RWA biotypes worldwide. The goal of this study w

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