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Dissertations / Theses on the topic 'QTL analysi'

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Published: 9 March 2023
Last updated: 19 July 2025

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1

MUSTAFA, MAJID HASSAN MUSTAFA. "BROWN ROT DISEASE DEVELOPMENT IN PEACH(P. PERSICA L. BATSCH): FROM FUNGAL BIOLOGY TO HIGH-THROUGHPUT ON-FIELDPHENOTYPING." Doctoral thesis, Università degli Studi di Milano, 2022. http://hdl.handle.net/2434/924066.

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Brown rot (BR) disease, caused by Monilinia spp., causes significant pre-and post-harvest losses in stone fruit production, especially in humid and warm temperatures. In this thesis, we tried to tackle the subject with three complementary approaches. First, the recent progress in BR resistance in peach fruit was reviewed. Then we highlighted best practices in phenotyping BR susceptibility/resistance procedures in field and in vitro. We concluded that the main factors contributing to disease development are Monilinia inocula availability, environmental conditions, cultivars, fruit stage and man
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Prashar, Ankush. "Arabidopsis QTL analysis using stairs and gene expression." Thesis, University of Birmingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435316.

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3

Taenzler, Bärbel. "QTL-Analyse der Backqualität in Einkornweizen (T. m. monococcum)." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=964783304.

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4

Ma, Junwu. "Genome-wide QTL mapping for complex traits in pigs and focusing analysis on fatness QTL on porcine chromosome X." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/584/.

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Les buts de cette thèse étaient l'acquisition de connaissances sur l'architecture génétique de caractères complexes et l'étude de la variabilité des taux de recombinaison chez le porc. La première partie de cette thèse présente une analyse sur l'ensemble du génome des locus influençant des caractères quantitatifs (QTL) au sein de croisements F2 entre des verrats de race Duroc blanc et des truies Erhulian, protocole développé en Chine à l'université d'agriculture du Jiangxi (JXAU). La population étudiée dans le cadre de cette thèse regroupe de 750 à 1030 animaux F2 mesurés sur 80 caractères con
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von, Delft Annette. "ProteomicQTL (pQTL):Kopplungsanalyse zur Identifizierung genetischer Modulatoren des Plasmaproteoms." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-113003.

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Ziel der vorliegenden Arbeit war die Identifizierung genetischer Faktoren, die das Plasmaproteom regulieren. Die Untersuchungen wurden im Modellsystem einer F2-Kreuzung zweier Inzucht-Mausstämme (FVB.LDLR-/-, C57BL/6.LDLR-/-) durchgeführt, die sich in ihrer Atheroskleroseausprägung unterscheiden. Von jedem der 453 Tiere der F2-Generation wurden Plasmaproteomprofile mittels Massenspektrometrie (MALDI-TOF) generiert. Diese Spektren wurden in zwei unabhängigen Datenanalysen ausgewertet und eine Kopplungsanalyse (QTL-Analyse, quantitative trait loci) der Phänotypen mit jeweils 192 genetischen Mark
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Zhong, Shengqiang. "Integrating QTL analysis into plant breeding practice using Bayesian statistics." [Ames, Iowa : Iowa State University], 2008.

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7

Guess, Adam Joseph. "QTL analysis of ray pattern in Caenorhabditis elegans recombinant inbred lines." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1205197070.

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8

Ousova, Olga. "Analyse d'un QTL d'hypercortisolémie chez le porc : rôle de la transcortine." Bordeaux 2, 2001. http://www.theses.fr/2001BOR28867.

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Cette thèse avait pour but de préciser les facteurs génétiques responsables des différences de cortisolémie entre les races de porc Meishan et Large White. Lors d'études précédentes d'analyse de liaisons génétiques sur le croisement F2 Meishan x Large White, un QTL influençant les taux de cortisol basal et induit par un stress a été cartographié sur le chromosome 7 porcin. Par l'analyse comparative des cartes humaine, murine et porcine nous avons révélé la présence d'un gène candidat positionnel codant pour la transcortine ou CBG (corticosteroid binding globulin). En premier lieu nous avons vé
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Cai, Jin. "Mapping QTL for fusarium head blight resistance in Chinese wheat landraces." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13703.

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Master of Science<br>Department of Agronomy<br>Allan Fritz<br>Fusarium head blight (FHB) is one of the most devastative diseases in wheat. Growing resistant cultivars is one of the most effective strategies to minimize the disease damage. Huangcandou (HCD) is a Chinese wheat landrace showing a high level of resistance to FHB spread within a spike (type II). To identify quantitative traits loci (QTL) for resistance in HCD, a population of 190 recombinant inbred lines (RILs) were developed from a cross between HCD and Jagger, a susceptible hard winter wheat (HWW) released in Kansas. The populati
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Elisabeth, Ahlgren. "Marker generation for Fine Mapping a QTL in the chicken." Thesis, Linköpings universitet, Biologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108983.

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The purpose of this study was to design and test five SNP markers in an inbred chicken cross between Red Junglefowl and domestic White Leghorn of the 8th generation. The markers lie in a region affecting the tonic immobility behaviour which differs significantly between the two species. The markers could be identified by usage of PCR and pyrosequencing. The data obtained were further used in a small scale quantitative trait locus (QTL) analysis. QTL analysis is a statistical method to link phenotypic traits to genotypic data. Four out of five markers could be genotypes and thereby, made it pos
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11

Lisec, Jan. "Identification and characterization of metabolic Quantitative Trait Loci (QTL) in Arabidopsis thaliana." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/2590/.

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Plants are the primary producers of biomass and thereby the basis of all life. Many varieties are cultivated, mainly to produce food, but to an increasing amount as a source of renewable energy. Because of the limited acreage available, further improvements of cultivated species both with respect to yield and composition are inevitable. One approach to further progress in developing improved plant cultivars is a systems biology oriented approach. This work aimed to investigate the primary metabolism of the model plant A.thaliana and its relation to plant growth using quantitative genetics meth
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12

Nettelblad, Carl. "Two Optimization Problems in Genetics : Multi-dimensional QTL Analysis and Haplotype Inference." Doctoral thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180920.

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The existence of new technologies, implemented in efficient platforms and workflows has made massive genotyping available to all fields of biology and medicine. Genetic analyses are no longer dominated by experimental work in laboratories, but rather the interpretation of the resulting data. When billions of data points representing thousands of individuals are available, efficient computational tools are required. The focus of this thesis is on developing models, methods and implementations for such tools. The first theme of the thesis is multi-dimensional scans for quantitative trait loci (Q
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13

Ben, jemaa Slim. "Cartographie fine de qtl de fertilite femelle chez les bovins laitiers franÇais." Phd thesis, AgroParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00005162.

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L'objectif de la thèse est la cartographie fine de QTL de fertilité femelle (FF) chez les races bovines Françaises : la Prim'Holstein (PH), la Normande (NO) et la Montbéliarde (MO). La première étape du projet consiste en une primo-localisation, sur un dispositif de 78 familles, de QTL de FF dans 12 régions génomiques. Six QTL de FF ont été détectés chez la PH et deux chez la NO. La deuxième étape consiste en une cartographie des QTL détectés sur les chromosomes BTA01, BTA02, BTA03 et BTA21 sur un échantillon de 41 familles des trois races. La localisation de ces QTL a été confirmée et précisé
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Wang, Xiaoqiang. "Apport des données d’expression génique à la cartographie de QTL chez les espèces d’élevage." Rennes, Agrocampus Ouest, 2011. http://www.theses.fr/2011NSARB218.

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La recherche du polymorphisme causal d’un QTL est une étape encore longue et difficile dans la plupart des espèces d’animaux domestiques. Dans ce cadre, ce travail porte sur l’intégration d’informations à haut débit sur l’expression des gènes dans un tissu. La démarche traditionnelle consiste à détecter des QTL sur ces données d’expression de gènes (détection de eQTL) en mettant en oeuvre, gène par gène, des méthodes de cartographie d’intervalle. Hors, il apparaît qu’il existe un biais sur la position estimée des QTL, biais aboutissant sur ces données de grande dimension à un nombre anormaleme
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15

Salih, Hanni. "An updated object oriented bovine QTL viewer and genome-wide bovine meta-analysis." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2969.

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16

Pirseyedi, Seyed Mostafa. "QTL Analysis for Fusarium Head Blight Resistance in Tunisian-Derived Durum Wheat Populations." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27014.

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Durum (2n=4x=28; AABB) wheat is the grain of choice for the production of high-quality pasta products. Fusarium spp. are causal pathogens for Fusarium Head Blight (FHB). Limited host resistance to this disease exists among adapated durum cultivars. The use of Tunisian-derived durum lines for integration of FHB resistance in cultivars was evaluated. The genetic characterization of FHB resistance was evaluated, and markers assosciated with FHB resistance are presented in two populations. Two backcross inbred line (BIL) populations derived from cross between a resistant durum genotype `Tunisian 1
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Thumma, Bala Reddy. "QTL analysis of physiological and biochemical traits contributing to drought resistance in stylosanthes /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16386.pdf.

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18

Saint, Pierre Aude. "Méthodes d'analyse génétique de traits quantitatifs corrélés : application à l'étude de la densité minérale osseuse." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00633981.

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La plupart des maladies humaines ont une étiologie complexe avec des facteurs génétiques et environnementaux qui interagissent. Utiliser des phénotypes corrélés peut augmenter la puissance de détection de locus de trait quantitatif. Ce travail propose d'évaluer différentes approches d'analyse bivariée pour des traits corrélés en utilisant l'information apportée par les marqueurs au niveau de la liaison et de l'association. Le gain relatif de ces approches est comparé aux analyses univariées. Ce travail a été appliqué à la variation de la densité osseuse à deux sites squelettiques dans une coho
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Cicek, Mine II. "Genetic Analysis of Quantitative Trait Loci Associated with Seed Sucrose Content Using Molecular Markers in an Interspecific Glycine Cross." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36506.

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Sucrose content is one of the important seed quality traits in soybean, especially for oriental soyfood production. However, little genetic information is available on this quantitative trait yet. A previous study was conducted on seed sucrose content of soybean using a population of F2-derived lines from an interspecific cross between an adapted high-sucrose (8.3%) G. max breeding line (V71-370) and a low sucrose (1.6%) G. soja plant introduction (PI407162). Nineteen marker loci, mapping to seven linkage groups (A1, A2, E, F, L1, I, and M), were significantly associated with seed sucrose
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20

Sallé, Guillaume. "Détection et validation fonctionnelle de régions du génome affectant la résistance aux strongles gastro-intestinaux chez le mouton." Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0154/document.

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Les strongles gastro-intestinaux, dont Haemonchus contortus constituent un problème majeur pour l'élevage des ovins allaitants. Ils entrainent des pertes de production et le recours aux anthelminthiques est remis en question par l'apparition de souches de vers résistantes. La sélection d'ovins plus résistants fait partie des stratégies complémentaires de lutte les plus sérieuses. Cependant sa mise en oeuvre requiert une meilleure compréhension des mécanismes sous-jacents. Cette thèse vise à identifier les régions du génome ovin impliquées dans la résistance aux strongles gastro-intestinaux. Un
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21

Dierks, Claudia. "Molecular genetic analysis of quantitative trait loci (QTL) for osteochondrosis in Hanoverian warmblood horses." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980656702.

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22

Fischer, Birgitta. "Genetische Kartierung und QTL-Analyse agronomischer Eigenschaften der Weinrebe unter besonderer Berücksichtigung der Pilzresistenz." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975961322.

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23

Cabrera, Antonio. "Genetic Analysis and Fruit weight QTL fine mapping in Sweet cherry (Prunus avium L.)." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313531104.

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Stasko, Anna K. "Functional Gene Analysis of Resistance QTL towards Phytophthora sojae on SoybeanChromosome 19." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524139406566913.

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25

Huq, Md Nazmul. "The genetic basis of a domestication trait in the chicken: mapping quantitative trait loci for plumage colour." Thesis, Linköpings universitet, Biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78393.

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Domestication is the process by which animals become adapted to the environment provided by humans. The process of domestication has let to a number of correlated behavioural, morphological and physiological changes among many domesticated animal species. An example is the changes of plumage colour in the chicken. Plumage colour is one of the most readily observable traits that make distinction between breeds as well as between strains within a breed. Understanding the genetic architecture of pigmentation traits or indeed any trait is always a great challenge in evolutionary biology. The main
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Lima, Milena de Luna Alves. "Mapeamento de QTL para produção de grãos e caracters de planta em milho tropical utilizando marcadores microssatelites." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316646.

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Orientadores: Claudio Lopes de Souza Junior, Anete Pereira de Souza<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-06T11:28:57Z (GMT). No. of bitstreams: 1 Lima_MilenadeLunaAlves_D.pdf: 1291219 bytes, checksum: a3a078e58517d0d64e9051437ce18432 (MD5) Previous issue date: 2006<br>Resumo: A maior parte dos caracteres de importância agronômica e econômica do milho estão sob o controle de diversos locos gênicos, denominados locos de caracteres quantitativos (QTL). A possibilidade do uso de marcadores moleculares e o aperfeiçoa
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Masri, Amer. "Use of quantitative trait loci (QTL) affecting muscling in sheep for breeding." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/9526.

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Breeding programmes that use elite sires with the best estimated breeding values for muscling traits have achieved significant improvement in lamb production in the UK. Further acceleration of the rate of genetic gain for the desirable production traits could be achieved using DNA marker-assisted selection (MAS) breeding strategies. The underlying causal genetic variants associated with improved muscling may be unknown and lying between a cluster of genes known as quantitative trait loci (QTL) or could be single nucleotide polymorphisms (SNP). LoinMAXTM, Texel muscling QTL (TM-QTL) and c.*1232
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Braz, Camila Urbano [UNESP]. "Detecção de QTL para maciez da carne em bovinos da raça Nelore." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143485.

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Submitted by Camila Urbano Braz null (camila_urbano@yahoo.com.br) on 2016-08-29T20:11:34Z No. of bitstreams: 1 Tese_Camila_Urbano_Braz.pdf: 2227912 bytes, checksum: 63cf8f89ad9895f8c74ed5d890e0b2f9 (MD5)<br>Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-08-30T18:25:24Z (GMT) No. of bitstreams: 1 braz_cu_dr_jabo.pdf: 2227912 bytes, checksum: 63cf8f89ad9895f8c74ed5d890e0b2f9 (MD5)<br>Made available in DSpace on 2016-08-30T18:25:24Z (GMT). No. of bitstreams: 1 braz_cu_dr_jabo.pdf: 2227912 bytes, checksum: 63cf8f89ad9895f8c74ed5d890e0b2
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Haghdoust, Rouja. "Genetic and molecular analysis of resistance to adapted and non-adapted (heterologous) rust pathogens in barley." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24387.

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Rust diseases caused by Puccinia spp. are specialised to different economically important crops such as wheat and barley and can cause significant crop failure when severe. For many decades, genetic resistance has proven effective in protecting crops against rust pathogens. However, the ability of rust pathogens to evolve rapidly can lead to the emergence of new virulent races that can overcome genetic resistance. Therefore, the identification of new durable sources of resistance is essential for crop production and food security. Barley is a diploid crop with a reference genome sequence that
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Haddadi, Parham. "Analyse physiologique et génétique combinées pour améliorer le contenu en huile et la qualité du tournesol soumis à la sécheresse." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0114/document.

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Le tocophérol, le phytostérol, le pourcentage de protéines des graines, l'huile et les teneurs en acides gras ont été mesurés dans une population de lignées recombinantes (RILS) de tournesol, cultivées sous conditions de sécheresse, irrigation et semis tardif. Une analyse génétique de QTL a été réalisée à partir de ces mesures, en utilisant une carte génétique basée sur des marques SSR et avec des gènes candidats (1) impliqués dans la voie métabolique de tocophérol et phytostérol, (2) des gènes codant des antioxydants enzymatiques, (3) des gènes liés à la sécheresse et (4) des gènes homologues
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Jayawardena, Mahen. "An e-Science Approach to Genetic Analysis of Quantitative Traits." Doctoral thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-111597.

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Many important traits in plants, animals and humans are quantitative, and most such traits are generally believed to be affected by multiple genetic loci. Standard computational tools for mapping of quantitative traits (i.e. for finding Quantitative Trait Loci, QTL, in the genome) use linear regression models for relating the observed phenotypes to the genetic composition of individuals in an experimental population. Using these tools to simultaneously search for multiple QTL is computationally demanding. The main reason for this is the complex optimization landscape for the multidimensional g
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Cicek, Mine. "Genetic marker analysis of three major carbohydrates in soybean seeds." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/29300.

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Carbohydrate content sucrose, raffinose, and stachyose are one of the important seed quality traits in soybean. However, little is known about the genetics of these quantitative traits. Recombinant inbred lines (RIL) were developed from the interspecific hybridization between a Glycine max breeding line (V71-370) and a Glycine soja plant introduction (PI407162). The 308 RILs, each parent, and one cultivar were arranged in a randomized complete block design with two replications and planted at two locations in Virginia. The main objective of the first part of this research was to devise a quick
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Dabbert, Timothy A. "Genetic Analysis of Cotton Evaluated under High Temperature and Water Deficit." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338975.

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Upland cotton (Gossypium hirsutum) is cultivated in many contrasting production environments and is often subjected to a combination of abiotic stresses such as high temperature (heat) and water deficit (drought) stress. In the present dissertation, two recombinant inbred line populations were constructed from heat-tolerant and -susceptible parental lines and evaluated in multiple environments under the presence of two treatments, well-watered (heat stress) and water-limited in the presence of high temperature (combination of heat and drought stresses). We assessed two agronomic traits, seed c
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Rückert, Christine [Verfasser], and Jörn [Akademischer Betreuer] Bennewitz. "Joint QTL analysis of three connected F2-crosses in pigs / Christine Rückert. Betreuer: Jörn Bennewitz." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2012. http://d-nb.info/1027354386/34.

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Ibrahim, Mohamed Seifeldin E. [Verfasser]. "QTL Analysis of Drought Tolerance in Spring Wheat (Triticum aestivum L.) / Seifeldin E Ibrahim Mohamed." Aachen : Shaker, 2007. http://d-nb.info/1170527027/34.

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Amin, Ayman Yhia. "Markers for QTL and bulk segregant analysis of salt tolerance in wheat (Triticum aestivum L.)." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246671.

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Chen, Jing. "Development of novel theory and methods for QTL analysis and inferring crossover interference in autotetraploids." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6703/.

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Polyploidization widely occurs in the evolutionary history of eukaryotes, especially for flowering plants. Exploring the evolutionary and agricultural important role by polyploidy is mystery and challenging job. In the first chapter of this thesis, I developed a quantitative genetics model based on orthogonal contrast scales, which would provide theoretical basis for any further bi-allelic QTL analysis in autotetraploid species. In the next chapter, I developed an interval mapping method for QTL mapping in outbred population for autotetraploid, considering both bivalent and quadrivalent pairin
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Ashtari, Mahini Rahil. "Analysis and Identification of QTL for Resistance to Sclerotinia Sclerotiorum in Pea (Pisum sativum L.)." Diss., North Dakota State University, 2018. https://hdl.handle.net/10365/28867.

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Document incorrectly classified as a thesis on title page (decision to classify as a dissertation from NDSU Graduate School)<br>White mold caused by Sclerotinia sclerotiorumi s one of the most devastating diseases infecting field pea (Pisum sativum L.) which causes severe yield loss worldwide. Population 17 (Lifter/ PI240515), and Population 19 (PI169603/ Medora) were developed by single seed descent and screened by greenhouse evaluation and detached stem assay to identify potential sources of white mold resistance. Twenty-two partial resistant inbred lines were identified with short internode
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Richbourg, Henry L. "QTL analysis for genes conferring tolerance to drought stress and damage from UV-B radiation." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-1/r1/richbourgh/henryrichbourg.pdf.

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Joseph, Bindu. "Genomic analysis of a major seed protein/oil QTL region on soybean linkage group I." [Ames, Iowa : Iowa State University], 2009.

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Zhang, Rong. "Genetic analysis of fruit flavor and aroma volatile compounds in wild strawberry." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670142.

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La maduixa representa el cultiu de baies més consumit a tot el món, amb una producció de 9,2 milions de tones l’any 2017. Els programes de millora tradicionalment s’han centrat en els trets agronòmics, però la qualitat dels fruits s’ha convertit recentment en un objectiu principal. El sabor és el principal factor responsable de la qualitat de la maduixa, sent atractiu per el consumidor. La maduixa diploide (Fragaria vesca) es un model per a el maduixot, gràcies al cicle de vida perenne, genoma reduït, curt període generacional, sistema de transformació genètica senzill i eficient, i als abund
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Mahjani, Behrang. "Methods from Statistical Computing for Genetic Analysis of Complex Traits." Doctoral thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-284378.

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The goal of this thesis is to explore, improve and implement some advanced modern computational methods in statistics, focusing on applications in genetics. The thesis has three major directions. First, we study likelihoods for genetics analysis of experimental populations. Here, the maximum likelihood can be viewed as a computational global optimization problem. We introduce a faster optimization algorithm called PruneDIRECT, and explain how it can be parallelized for permutation testing using the Map-Reduce framework. We have implemented PruneDIRECT as an open source R package, and also Soft
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Giraud, Héloïse. "Genetic analysis of hybrid value for silage maize in multiparental designs : QTL detection and genomic selection." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS013/document.

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La sélection génomique offre de nouvelles perspectives en amélioration des plantes pour la sélection de caractères complexes. Le travail proposé porte sur l’évaluation de son intérêt dans le cadre d’un programme de sélection réciproque pour la valeur d’hybrides entre deux groupes génétiques de maïs complémentaires. Il s’appuie sur un dispositif expérimental original constitué de 900 hybrides produits dans un plan factoriel entre deux dispositifs multiparentaux connectés. L’objectif de la sélection est d’améliorer le rendement ensilage des hybrides tout en améliorant leur digestibilité. Une réf
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Allinne, Clémentine. "Modélisation écophysiologique et analyse génétique pour la recherche de génotypes de tournesol adaptés aux basses températures causées par des semis précoces." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT012A/document.

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Le semis précoce du tournesol, d’un à deux mois par rapport à la période habituelle (Avril dans le sud ouest de la France), a été envisagé pour esquiver les périodes de sécheresses estivales. Cette stratégie conduit à un abaissement des températures de l’ordre de 5 à 10°C durant les premières phases de développement de la culture. L’objectif de ce travail est donc d’identifier des génotypes de tournesol adaptés à des conditions de basses températures en début de cycle, et de fournir des outils pour la sélection de ces nouveaux idéotypes. Dans un premier temps le modèle de culture SUNFLO, dével
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Gianotto, Adriana Cheavegatti. "Desenvolvimento de modelos de causalidade com informações de QTLs para estudo do relacionamento de caracteres fenotípicos relativos à absorção de fósforo em milho." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-26052015-103020/.

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Metodologias de mapeamento de QTLs modernas empregam abordagem multivariada e se beneficiam da matriz de covariâncias fenotípicas para melhorar as estimativas de localização e efeitos de QTLs. No entanto, a correlação fenotípica pode ser em parte atribuída às relações de causalidade entre os fenótipos e mesmo as abordagens de mapeamento de QTLs multivariadas atuais têm desconsiderado tais relacionamentos. Dentre as metodologias científicas desenvolvidas para o estudo da causalidade em dados observacionais, destacam-se os modelos de equações estruturais e os modelos gráficos. Neste trabalho, fo
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Lee, Sungwoo. "Identification of Quantitative Trait Loci for Partial Resistance to Phytophthora sojae in Six Soybean [Glycine max (L.) Merr] Plant Introductions." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366298598.

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Cai, Jin. "Meta-analysis of QTL for Fusarium head blight resistance in Chinese wheat landraces using genotyping by sequencing." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32166.

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Doctor of Philosophy<br>Department of Agronomy<br>Guihua Bai<br>Guorong Zhang<br>Fusarium head blight (FHB) is a devastating fungal disease in wheat, reducing not only grain yield but also quality. The pathogen produces the mycotoxin deoxynivalenol (DON) that induces severe toxicological problems in human and animals. Using host resistance has been the most efficient way to control the disease. To identify quantitative trait loci (QTLs) for FHB resistance in Chinese landrace Haiyanzhong (HYZ), a recombinant inbred lines (RILs) population derived from a cross between HYZ and Wheaton was develop
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au, kryan@ccg murdoch edu, and Karon Magdalene Leanne Ryan. "Variation of flour colour in Western Australia adapted wheat: comparative genomics, molecular markers and QTL analysis." Murdoch University, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061019.130337.

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The yellowness of flour colour ranges is an important quality trait in wheat for end-use products and is determined by the accumulation of carotenoids in the endosperm. The aims of this study were to develop EST-based molecular markers for genes encoding enzymes of the carotenoid biosynthetic pathway leading to xanthophyll accumulation and identify quantitative trait loci for flour colour (b*) and xanthophyll content in Western Australian adapted germplasm. A novel bioinformatic strategy was developed to identify rice genes encoding key enzymes of the carotenoid biosynthetic pathway and to
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Ryan, Karon Magadalene Leanne. "Variation of flour colour in Western Australia adapted wheat : comparative genomics, molecular markers and QTL analysis /." Access via Murdoch University Digital Theses Project, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061019.130337.

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Whitehead, Caragh. "Using QTL analysis of Brachypodium distachyon to understand the genetic basis of grass cell wall saccharification." Thesis, University of York, 2016. http://etheses.whiterose.ac.uk/17697/.

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Second generation biofuels are seen as a sustainable solution to the problem of dwindling fossil fuels stocks. However, the process of converting lignocellulosic biomass to sugars for fermentation is expensive due the recalcitrance of these materials to enzymatic digestion. The identification of quantitative trait loci (QTL) in the model grass species Brachypodium distachyon was undertaken in order to improve our understanding of genes that affect straw digestibility. Initially, the study focused on the analysis of natural accessions to determine if there was variation, in terms of digestibili
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