Dissertations / Theses on the topic 'Genetic diversity'
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Quinton, Margaret. "Genetic diversity in selected populations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0016/NQ47407.pdf.
Full textBarker, Gary L. A. "Genetic diversity in Emiliania huxleyi." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294614.
Full textFitzcharles, Elaine M. "Genetic diversity of Antarctic fish." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/6860.
Full textOlsson, Jenny. "Genetic diversity and hardiness in Scots pine from Scandinavia to Russia." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160222.
Full textThomson, Brent Robert. "Genetic Diversity in Wheat: Analysis using Diversity Arrays Technology (DArT) in bread and durum wheats." Thesis, The University of Sydney, 2011. http://hdl.handle.net/2123/8087.
Full textPaul, Richard E. L. "The genetic diversity of Plasmodium falciparum." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318788.
Full textTownsend, S. J. "Genetic diversity and domestication in sheep." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368146.
Full textWilliams, Louise Jane. "Recombinational mechanisms in human genetic diversity." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342483.
Full textRogers, Emma Jayne. "Haplotype evolution and human genetic diversity." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342507.
Full textRitz, Liliane R. "Genetic diversity in the tribe Bovini /." [S.l.] : [s.n.], 1997. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Full textSchmid, Marianne. "Genetic diversity in Swiss cattle breeds /." [S.l.] : [s.n.], 1998. http://www.stub.unibe.ch/html/haupt/datenbanken/diss/bestell.html.
Full textCeccobelli, Simone. "Genetic diversity of mediterranean autochthonous chicken breeds." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3422653.
Full textLe razze locali possono essere considerate parte della storia di molte popolazioni umane, così come materiale importante dal punto di vista scientifico. La catalogazione, la caratterizzazione e il controllo di routine della variabilità delle risorse genetiche animali sono pratiche fondamentali nelle strategie di miglioramento genetico e nei programmi di conservazione. La genetica molecolare ci fornisce importanti strumenti per analizzare la variabilità genetica tra e all’interno delle razze. Numerosi approcci sono stati sviluppati e utilizzati per comprendere i diversi aspetti che contribuiscono alla differenziazione delle razze. Questa tesi è costituita da tre contributi scientifici. L’obiettivo del primo (Capitolo 3) è stato quello di studiare la variabilità e analizzare la struttura di popolazione di due razze avicole Italiane (Ancona e Livorno), poiché possono essere considerate una fonte preziosa di variabilità genetica. Sono stati raccolti campioni di sangue da 131 animali e genotipati mediante l’utilizzo di un panel di 30 marcatori microsatelliti. Gli indici genetici calcolati suggeriscono un deficit di eterozigosità e un certo livello di consanguineità (eterozigosità media osservata = 0,46; eterozigosità media attesa = 0,53; FIS in Ancona e Livorno = 0,251 e 0,086). L’albero delle distance inter-individuali DAS, elaborato mediante l’algoritmo Neighbour-Jouning, e l’analisi FCA, hanno evidenziato una elevata variabilità interna in Livorno rispetto alla razza Ancona. L’analisi mediante il software STRUCTURE ha evidenziato l’unicità genetica delle due razze oggetto di studio e la presenza di subgruppi nella razza Ancona, derivanti da un possibile isolamento genetico. Nel quarto capitolo, è descritta la caratterizzazione genetica di cinque razze avicole italiane (Ancona, Livornese bianca, Modenese, Romagnola e Valdarnese Bianca), incluse le loro origini, la loro differenziazione e il loro attuale livello di variabilità genetica. Il primo obiettivo di tale studio è di indagare l’origine genetica di queste cinque razze di pollo italiane sulla base delle informazioni provenienti dal DNA mitocondriale (mtDNA). Il secondo obiettivo è stato quello di valutare la variabilità genetica, la struttura di popolazione e le loro relazioni genetiche mediante l’utilizzo di 27 marcatori molecolari microsatelliti. Al fine di raggiungere tali obiettivi, è stato sequenziato un frammento di 506 bp della regione D-loop del DNA mitocondriale di 50 animali delle cinque razze avicole oggetto di studio. Sono stati individuati diciotto siti di variabilità che hanno definito 12 aplotipi. Questi ultimi sono stati assegnati a tre aplogruppi, probabilmente attribuiti a due linee materne. I risultati hanno mostrato che il 90% degli aplotipi ricade nell’aplogruppo E, originario del subcontinente Indiano come descritto in precedenza da altri autori. Per l’analisi microsatellitare, 137 singoli campioni di sangue sono stati raccolti nelle cinque razze italiane oggetto di studio. Un totale di 147 alleli è stato rilevato in 27 marcatori microsatelliti. Le cinque razze Italiane hanno mostrato un livello di consanguineità leggermente superiore (FIS = 0,08) rispetto alle popolazioni commerciali utilizzate come razze di riferimento. L’analisi con il software STRUCTURE ha rilevato una chiara separazione delle cinque razze Italiane da queste popolazioni riferimento; una seconda analisi delle sole razze oggetto di studio ha permesso di discriminare le singole razze italiane. Scopo del terzo studio è stato quello di descrivere la variabilità genetica e le relazioni tra sedici popolazioni avicole allevate nel bacino del Mediterraneo, mediante il sequenziamento della regione D-loop del DNA mitocondriale e l’utilizzo di un panel di 27 marcatori molecolari microsatelliti (Capitolo 5). Un frammento di 506 bp del D-loop mitocondriale è stato sequenziato in 160 campioni di DNA. Sono stati osservati 25 siti di variabilità e 21 aplotipi che definiscono tre aplogruppi e probabilmente tre linee materne. Il principale aplotipo, individuato nelle popolazioni del Mediterraneo, è rappresentato dall’E1 derivante dal subcontinente Indiano. Altre sequenze sono incluse negli aplogruppi A e B, i quali originano dal sud della Cina e dal Giappone. Per l’analisi microsatellitare, sono stai racconti 465 campioni di sangue. I risultati indicano che circa il 22% della variabilità totale origina da variazioni che intercorrono tra le popolazioni oggetto di studio. L’analisi di STRUCTURE ha rilevato un’ampia mescolanza genetica in molte delle popolazioni studiate. In conclusione, adeguate misure di conservazione dovrebbero essere attuate al fine di minimizzare fenomeni di consanguineità e d’incrocio incontrollato nelle razze studiate. Particolare attenzione, pertanto, è richiesta al fine di conservare e salvaguardare queste razze potenzialmente vulnerabili.
Gardner, Michelle. "Genetic diversity of " brain genes" across worldwide." Doctoral thesis, Universitat Pompeu Fabra, 2007. http://hdl.handle.net/10803/7169.
Full textL'objectiu de l'estudi té dos vessants: per una banda l'anàlisi de la diversitat genètica en un conjunt de gens implicats en malaltia humana, en aquest cas en malaltia psiquiàtrica, en poblacions humanes mundials, amb la intenció d'assentar les bases per propers esforços de mapatge genètic; i per altra banda analitzar la diversitat genètica en aquest conjunt de gens per tal de descobrir evidències d'esdeveniments històrics, incloent possibles evidències de selecció.
The work presented in this thesis is a study of the genetic variation in a set of genes related to neurological function ('Brain genes'). Twenty two genes are examined, all of which are involved in either the Dopaminergic, Serotonergic or the Glutamatergic systems of neurotransmission.
The objective of the study has two aspects: on the one hand the analysis of genetic variation in a set of genes which are implicated in human disease, in this case psychiatric disease, across global human populations, towards the end of providing some new insight for gene mapping efforts, and on the other hand the study of genetic variation in this set of genes may reveal traces of the population history events undergone, including possible evidence for selection.
Wilkinson, Samantha. "Genetic diversity and structure of livestock breeds." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/6488.
Full textGustafson, Steven Matt. "An analysis of diversity in genetic programming." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/10057/.
Full textClarke, Stephen James. "Genetic diversity in nativeIrish oak and ash." Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397902.
Full textMauricio, Isabel Larguinho. "Genetic diversity in the Leishmania donovani complex." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2000. http://researchonline.lshtm.ac.uk/682281/.
Full textSoto, Esteban. "Genetic and virulence diversity of Flavobacterium columnare." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-05292007-091752.
Full textPalo, Jukka. "Genetic diversity and phylogeography of landlocked seals." Helsinki : University of Helsinki, 2003. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/palo/.
Full textKoban, Evren. "Genetic Diversity Of Native And Crossbreed Sheep Breeds In Anatolia." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605694/index.pdf.
Full text, Karayaka, HemSin, Norduz, Kangal, Konya Merinosu, Tü
rkgeldi) and one Iraqi breed (Hamdani) were analyzed by sampling from breeding farms and local breeders. After excluding close relatives by Kinship analysis, the genetic variation within breeds was estimated as gene diversities (HE), which ranged between 0.686 and 0.793. The mean number of observed alleles (MNA) ranged between 5.8 and 11.8. The allele frequency distribution across Turkey showed no gradient from east to west expected in accordance with the Neolithic Demic Diffusion model. The differentiation between different samples of Akkaraman, Dagliç
and Karayaka breeds was tested by FST index. Akkaraman1 sample from the breeding farm was significantly (P<
0.001) different from the other two Akkaraman samples. Deviation from HW expectations observed for Akkaraman1, ivesi, Morkaraman and HemSin breeds. AMOVA analysis revealed that most of the total genetic variation (~90%) was partitioned within the individuals. In parallel to this observation, when factorial correspondence analysis and shared alleles distances were used to analyze the relationship between the individuals of the breeds, there was no clear discrimination between breeds. Moreover, NJ tree constructed based on DA genetic distance, and PC analyses were used to analyze among breed differentiation. Delaunay Network drew 4 genetic boundaries (two of them being parallel to geographic boundaries) between breeds. All the results indicated that Kivircik was the most differentiated breed. Finally, Mantel Test and Bottleneck analysis did not reveal a significant result. Kivircik breed, among all native Turkish breeds, was found to be the genetically closest to the European breeds based on the loci analyzed. The genetic variation in Turkish breeds was not much higher than that of European breeds, which might be a consequence of the recent sharp decrease in sheep number.
Lee, Suk-wah, and 李淑華. "Fungicide resistance and genetic diversity of Penicillium digitatum inHong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31226255.
Full textMoody, Jonathan. "Genetic diversity in the processing and transcriptomic diversity in the targeting of microRNAs." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/25409.
Full textWint, Ashley A. "Genetic Diversity in Native and Invasive Rubus (Rosaceae)." TopSCHOLAR®, 2008. http://digitalcommons.wku.edu/theses/17.
Full textGraham, Elaine Brigid. "Genetic diversity and crossing relationships of Lycopersicon chilense /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.
Full textLarsson, Pär. "The genetic composition and diversity of Francisella tularensis." Doctoral thesis, Umeå University, Clinical Microbiology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1139.
Full textFrancisella tularensis is the causative agent of the debilitating, sometimes fatal zoonotic disease tularemia. To date, little information has been available on the genetic makeup of this pathogen, its evolution, and the genetic differences which characterize subspecific lineages. These are the main areas addressed in this thesis.
The work indicated a high degree of genetic conservation of F. tularensis, both on the sequence level as determined by sequencing and on the compositional level, determined by array-based comparative genomic hybridizations (aCGH). One striking finding was that subsp. mediasiatica was most similar to subsp. tularensis, despite their natural confinement to Central Asia and North America, respectively. All genetic Regions of Difference RD found by aCGH distinguishing lineages were had resulted from repeat-mediated excision of DNA. This was used to identify additional RDs. Such data along with a multiple locus sequence analysis suggested an evolutionary scenario for F. tularensis.
Based on genomic information, a novel typing scheme for F. tularensis was furthermore devised and evaluated. This method provided increased robustness compared to previously used methods for F. tularensis typing, while retaining a capacity for high resolution.
Finally, the genomic sequence of the highly virulent F. tularensis strain SCHU S4 was determined and analysed. Evidenced by numerous pseudogenes and disrupted metabolic pathways, the bacterium appears to be undergoing a genome reduction process whereby a large proportion of the genetic capacity gradually is lost. It is likely that F. tularensis has irreversibly has evolved into an obligate host-dependent bacterium, incapable of a free-living existence. Unexpectedly, the bacterium was found to be devoid of common virulence mechanisms such as classic toxins, or type III and IV secretion systems. Instead, the virulence of this bacterium is probably largely the result of specific and unusual mechanisms.
Uimaniemi, L. (Leena). "Maintenance of genetic diversity in four taiga specialists." Doctoral thesis, University of Oulu, 2004. http://urn.fi/urn:isbn:9514274105.
Full textLarsson, Pär. "The genetic composition and diversity of Francisella tularensis /." Umeå : Umeå universitet, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1139.
Full textIsmail, Mohamed. "Molecular genetic diversity among natural populations of Populus." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/26273.
Full textMay, Shoshanna. "Fitness and genetic diversity in Bufo calamita populations." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505908.
Full textCraven, Kelly D. "COEVOLUTION AND GENETIC DIVERSITY IN GRASS-ENDOPHYTE SYMBIOSES." UKnowledge, 2003. http://uknowledge.uky.edu/gradschool_diss/431.
Full textCooper, Fiona Mary Phillips. "Geographic distribution and genetic diversity of black poplar." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246878.
Full textMassawe, Festo J. "Phenotypic and genetic diversity in Bambara groundnut landraces." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342048.
Full textWard-Rainey, Naomi Louise. "Genetic diversity in members of the order Planctomycetales." Thesis, University of Warwick, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390026.
Full textSavage, Anne Margaret. "Genetic diversity and photosynthetic characteristics of zooxanthellae (Symbiodinium)." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369298.
Full textHarris, Kathryn Ann. "Genetic diversity and evolution of hepatitis C virus." Thesis, Open University, 2000. http://oro.open.ac.uk/58053/.
Full textYang, N. "Population history and genetic diversity in the Americas." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/668017/.
Full textAlves, Mara Lisa. "Exploring maize genetic diversity – a quality-driven perspective." Doctoral thesis, Universidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica António Xavier, 2018. http://hdl.handle.net/10362/78960.
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Tobar, Pinon Maria Gabriela. "Genetic Diversity of the Guatemalan Climbing Bean Collections." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28447.
Full textUSAID
Legume Innovation Lab Project
North Dakota State University (NDSU)
ICTA
Gutiérrez, Lucía. "Genetic diversity in cultivated and wild Hordeum species." [Ames, Iowa : Iowa State University], 2008.
Find full textWilley, N. J. "Rust Resistance in Wheat-Diversity and Genetic Studies." Thesis, The University of Sydney, 2011. https://hdl.handle.net/2123/29227.
Full textAlruhaili, M. H. B. "Genetic diversity of African isolates of Toxoplasma gondii." Thesis, University of Salford, 2016. http://usir.salford.ac.uk/37753/.
Full textLazar, Katherine. "The genetic diversity of Teratosphaeria cryptica in Australia." Thesis, Lazar, Katherine (2016) The genetic diversity of Teratosphaeria cryptica in Australia. PhD thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/39531/.
Full textda, Fonseca Batista Vera Alexandra Garcia. "Defining marine meiofaunal genetic diversity using 454 sequencing." Thesis, Bangor University, 2011. https://research.bangor.ac.uk/portal/en/theses/defining-marine-meiofaunal-genetic-diversity-using-454-sequencing(549559f2-3dc7-4baf-b6e1-a5d1a17aef5a).html.
Full textDíaz, Oscar. "Genetic diversity in Elymus species (Triticeae) with emphasis on the Nordic region /." Svalöv : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5493-X.pdf.
Full textRasmussen, Greig S. "Memorializing the loss of genetic diversity, a genetic archive and memorial for Calgary." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0035/MQ66979.pdf.
Full textMasumbuko, Linus. "Study of genetic diversity and micropopagation of Coffea arabica L. and evaluation of genetic diversity in Cocos nucifera L. from Tanzania /." Alnarp : Dept. of Crop Science, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200598.pdf.
Full textSelemani, George Paul. "Genetic diversity and population structure of plasmodium falciparum from four epidemiological locations in Malawi." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/d1021026.
Full textAtangana, Alain Rene. "Phenotypic diversity in fruit and seed traits, and neutral genetic diversity in Allanblackia Floribunda." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27171/27171.pdf.
Full textAllanblackia floribunda or tallow tree is a tropical forest-tree species that is valued for its seeds, which are rich in hard fat consisting mostly of stearic and oleic acids, reported to lower plasma cholesterol levels, thus reducing the risks of heart attack. Owing to this fat profile, Allanblackia oil is used for margarine production and in soap and ointments manufacture, and seeds extracted from Allanblackia fruits by local communities are traded. We determined whether the species could be genetically improved for fruit/seed production by sampling 17 to 40 fruits from each of 70 trees that were distributed among four sites in wild stands. Fat was extracted from the seeds, and stearic and oleic acid content of the fat was estimated using methods developed in this study. Phenotypic variation in fruit/seed traits was assessed within- and among-trees, and among sites. Repeatabilities were estimated for measured characters, and relationships between these characters investigated. Twenty “plus trees” were selected for breeding, and implications for improvement discussed. Then we isolated and characterized ten microsatellite primer pairs for A. floribunda. Seven of these microsatellite loci were polymorph for both Allanblackia gabonensis and Allanblackia stanerana species as well. Using eight informative microsatellite loci, we have characterized the genetic structure of A. floribunda natural populations from Cameroon, and inferred the recent history of rainforests from Central Africa. No significant difference was identified in genetic parameters between wild stands and the breeding population, indicating that breeding A. floribunda from 20 trees would not reduce nuclear genetic diversity. However, a slight increase in inbreeding was observed in the breeding population, and recommendations for genetic diversity conservation during tree improvement in the species are made.
Acar, Hande. "Bioinformatic Analyses In Microsatellite-based Genetic Diversity Of Turkish Sheep Breeds." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612585/index.pdf.
Full textl, Hemsin, Ç
ine Ç
apari, Norduz, Herik, Akkaraman, Dagliç
, Gö
kç
eada, Ivesi, Karayaka, Kivircik and Morkaraman
in total represented by 628 individuals) were analyzed based on 20 microsatellite loci. Loci were amplified by Polymerase Chain Reactions and products were electronically recorded and converted into [628 x 20] matrix representing genotypes of individuals. Reliability of the genotyping and genetic diversity analyses were done by means of various bioinformatics tools. For the analyses, various statistical methods (Fisher'
s Exact Test, Neighbor-Joining tree construction, Factorial Correspondence Analysis (FCA), Analysis of Molecular Variation, Structure Analysis and Delaunay Analysis) were used. Since, inputs of some software were not compatible with the outputs of other software some Java classes were written whenever necessary. Analyses revealed that among the major breeds Dagliç
, Karayaka and Morkaraman breeds are highly admixed but Kivircik, Akkaraman and Ivesi are relatively distinct. Among the minor breeds, distinctness of Hemsin, Sakiz, Ç
ine Ç
apari, Gö
kç
eada and Karagü
l are more pronounced compared to all of the examined breeds. Since highly admixed individuals can be identified by Structure and FCA tests, results of the present study, which is part of a national project with the acronym TURKHAYGEN-I (www.turkhaygen.gov.tr), were found to be promising in establishing and managing relatively pure conservation flocks for the Turkish native sheep breeds which are believed to be the reservoirs of genetic variability.
Chipili, Jack. "Characterisation of populations of Magnaporthe grisea the rice blast fungus in some of the West African countries." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326952.
Full text