PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012

     

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Virulence contribution and recognition of homologs of the Verticillium dahliae effector Ave1 [PhD thesis]
Boshoven, Jordi C. \ 2017
verticillium dahliae - plant pathogenic fungi - plant pathogens - disease resistance - virulence factors - virulence - immunity - host parasite relationships - plant-microbe interactions - symbiosis - mutagenesis - resistance breeding
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Unravelling the genetic base of the meiotic recombination landscapes in two varieties of the button mushroom, Agaricus bisporus [PhD thesis]
Sedaghat Telgerd, Narges \ 2017
fungi - agaricus bisporus - mushrooms - genetics - breeding - meiosis - recombination
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Investigating the fruit texture genetic control in apple and its interplay with the production of volatile compounds using multi-family based analysis and genome wide association mapping [PhD thesis]
Full text publicly available; under embargo until:2019-09-21
Di Guardo, Mario \ 2017
malus domestica - apples - fruit - fruit growing - genetics - plant breeding - genome analysis
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Genetic diversity of potato for nitrogen use efficiency under low input conditions in Ethiopia [PhD thesis]
Getahun, Baye Berihun \ 2017
solanum tuberosum - potatoes - genetic diversity - nitrogen - plant breeding - ethiopia - nutrient use efficiency
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Disentangling hexaploid genetics : towards DNA-informed breeding for postharvest performance in chrysanthemum [PhD thesis]
Geest, Geert van \ 2017
chrysanthemum - plant breeding - postharvest quality - hexaploidy - polyploidy - quantitative trait loci - phenotypes - linkage mapping - metabolomics - polymorphism - dna
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Prospects of whole-genome sequence data in animal and plant breeding [PhD thesis]
Binsbergen, Rianne van \ 2017
next generation sequencing - dna sequencing - quantitative trait loci - cattle - genomics - solanum lycopersicum - animal breeding - plant breeding
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Unraveling the genetics of Botrytis cinerea resistance in Gerbera hybrida [PhD thesis]
Fu, Yiqian \ 2017
gerbera - plant pathogenic fungi - botrytis cinerea - disease resistance - genetic mapping - transcriptomics - quantitative trait loci - plant breeding
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Genetic studies towards elucidation of drought tolerance of potato [PhD thesis]
Tessema, Biructawit Bekele \ 2017
solanum tuberosum - potatoes - drought resistance - plant breeding - genetic analysis - quantitative trait loci
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Identification of metabolites involved in heat stress response in different tomato genotypes [PhD thesis]
Paupière, Marine J. \ 2017
solanum lycopersicum - tomatoes - genotypes - heat stress - heat tolerance - pollen - metabolomes - metabolites - metabolomics
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Susceptibility genes: an additional source for improved resistance [PhD thesis]
Full text publicly available; under embargo until:2019-05-16
Sun, Kaile \ 2017
solanum tuberosum - potatoes - solanum lycopersicum - tomatoes - genes - susceptibility - plant pathogenic fungi - phytophthora infestans - disease resistance - plant breeding
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Susceptibility pays off : insights into the mlo-based powdery mildew resistance [PhD thesis]
Appiano, Michela \ 2016
solanum lycopersicum - tomatoes - disease resistance - susceptibility - oidium neolycopersici - genes - gene expression - genomics - molecular breeding - plant breeding
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Development and application of a 20K SNP array in potato [PhD thesis]
Vos, Peter \ 2016
solanum tuberosum - potatoes - genotypes - single nucleotide polymorphism - data analysis - plant breeding - linkage disequilibrium - genome analysis - tetraploidy
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The allo-octoploid strawberry: simply complex [PhD thesis]
Dijk, Thijs van \ 2016
fragaria ananassa - strawberries - polyploidy - microsatellites - linkage mapping - genome analysis - quantitative trait loci - genetic mapping - flowering - plant breeding
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Targets and tools for optimizing lignocellulosic biomass quality of miscanthus [PhD thesis]
Weijde, Tim van der \ 2016
miscanthus - bioethanol - biomass - biofuels - lignocellulose - fuel crops - plant breeding - cell walls - cell wall components - genetic diversity - genetic variation - biomass conversion - biobased economy

Abstract:
Miscanthus is a perennial energy grass characterized by a high productivity and resource-use efficiency, making it an ideal biomass feedstock for the production of cellulosic biofuels and a wide range of other biobased value-chains. However, the large-scale commercialization of converting biomass into cellulosic biofuel is hindered by our inability to efficiently deconstruct the plant cell wall. Overall the compendium of knowledge generated within the framework of this thesis provided insights into the variation in biomass quality properties in miscanthus, increased our understanding of the molecular, genetic and environmental factors influencing its conversion efficiency into biofuel and provided tools to exploit these factors to expand the use of miscanthus as a lignocellulose feedstock.

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Adventitious root formation in Arabidopsis : underlying mechanisms and applications [PhD thesis]
Massoumi, Mehdi \ 2016
arabidopsis thaliana - adventitious roots - formation - plant development - quantitative traits - etiolation - auxins - explants - molecular biology - gene expression - dna methylation - rooting - ontogeny - plant breeding
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Aspects of bulblet growth of lily in vitro [PhD thesis]
Askari, Naser \ 2016
lilium - in vitro - growth - in vitro regeneration - abiotic conditions - stress - bulbs
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Heat stress tolerance responses in developing tomato anthers [PhD thesis]
Bita, Craita Elena \ 2016
tomatoes - solanum lycopersicum - anthers - heat stress - stress tolerance - heat tolerance - heat shock - transcriptomics - reproductive performance - gene expression profiling - meiosis

Abstract:
Generally, tomato is considered sensitive to heat stress. During the development of the tomato male gametophyte, anther development and particularly the first stage of meiosis are the most sensitive phases. Our goal was to analyse the general molecular response to moderate heat stress (MHS) in tomato meiotic anthers and then characterise aspects of the response to heat in tolerant genotypes. Understanding the metabolic changes that occur in heat tolerant varieties/lines during heat stress is essential for the production of tomato crops adapted to variable temperature increases. First, cDNA-AFLP was employed to reveal a general spatial and temporal response to MHS in a standard cultivar. The results showed about 1% of the analysed genes having significant modulation (down-regulation) in expression after just 2h of stress. Several transcripts were identified and associated to a response to heat. Additional analyses revealed that the candidate genes are expressed in the tapetum, but also in other tissues (Chapter 3). The Combimatrix technology has been used to fingerprint differences in response to heat between a tolerant and a sensitive genotype, with the aim of detecting candidate tolerance genes. The microarray analysis also shows about 1% of the genes having a significant modulation in expression after 2h of stress, and that the tolerant genotype reacts with fewer transcriptomic changes and exhibiting high constitutive levels of transcripts involved in protection and thermotolerance. In the heat-tolerant genotype, the majority of changes in gene expression is represented by up-regulation, while in the heat-sensitive genotype there is a general trend to down-regulate gene expression, soon after MHS. The putative functions associated with the genes identified by cDNA-AFLP or microarrays indicate involvement of heat shock, metabolism, antioxidant and development pathways. Based upon the observed differences in response to MHS and on literature sources, we identified a number of candidate transcripts involved in heat-tolerance. A functional analysis of expression modulation by qRT-PCR was performed in several pairs of genotypes and the results confirm observations from microarray regarding gene modulation (Chapter 4). An experimental approach to obtain insight into the hormonal regulation of the response to heat is described in chapter 5. Additional observations and results are discussed in chapter 6.

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Development of a breeding strategy for nitrogen use efficiency in spinach (Spinacia oleracea L.) [PhD thesis]
Chan Navarrete, Jose Rafael \ 2016
spinacia oleracea - spinach - plant breeding - nitrogen - nutrient use efficiency - genetic mapping - nitrogen fertilizers - fertilizer application - genetic diversity - nitrogen response
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Genetics and regulation of combined abiotic and biotic stress tolerance in tomato [PhD thesis]
Kissoudis, Christos \ 2016
solanum lycopersicum - tomatoes - disease resistance - stress tolerance - defence mechanisms - plant diseases - abiotic injuries - stress response - phenotypic variation - genetic analysis - plant breeding - salt tolerance
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Role of MLO genes in susceptibility to powdery mildew in apple and grapevine [PhD thesis]
Pessina, Stefano \ 2016
malus domestica - apples - vitis vinifera - grapes - plant pathogenic fungi - podosphaera leucotricha - erysiphe necator - disease resistance - susceptibility - genes - gene expression - gene knock-out - resistance breeding
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