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

     

Records 1 - 20 / 54

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Tales of the unpredictable : learning about institutional frameworks that support farmer management of agro-biodiversity [PhD thesis]
Boef, W.S. de \ 2000
agriculture - biodiversity - farmers - management - plant genetic resources - in situ conservation
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Management of genetic variability in rice (Oryza sativa L. and O. glaberrima Steud.) by breeders and farmers in Sierra Leone [PhD thesis]
Jusu, M.S. \ 1999
rice - Oryza sativa - genetic variation - plant genetic resources - farmers' attitudes - plant breeding - Sierra Leone
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Conservation and utilization of natural resources in the East Usambara forest reserves : conventional views and local perspectives [PhD thesis]
Kessy, J.F. \ 1998
forestry - forests - nature reserves - nature conservation - forestry practices - socioeconomics - natural resources - land use - tenure systems - afforestation - tanzania - non-wood forest products - national wealth
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Long term storage of clonal material of lily (Lilium L.) [PhD thesis]
Bonnier, F.J.M. \ 1997
lilium - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - tissue culture - embryo culture - storage - liliaceae - ornamental plants
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Parkia biglobosa (Leguminosae) en Afrique de l'Ouest : biosystematique et amelioration [PhD thesis]
Ouedraogo, A.S. \ 1995
mimosoideae - fabaceae - forestry - trees - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - west africa - parkia biglobosa
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The genus Lolium : taxonomy and genetic resources [PhD thesis]
Loos, B.P. \ 1994
grasses - poaceae - lolium - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - taxonomy - botany - isoenzymes - enzymology - plant anatomy - plant morphology
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Beta section beta : biogeographical patterns of variation, and taxonomy [PhD thesis]
Letschert, J.P.W. \ 1993
chenopodiaceae - taxonomy - botany - fodder beet - beta vulgaris - sugarbeet - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources - flora - phytogeography - germination - seed germination - seed dormancy - sicily - beta
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The use of crop growth simulation in evaluation of large germplasm collections : distribution, variation and evaluation of Syrian durum wheat landraces = [Het gebruik van gewasgroeisimulatie in de evaluatie van grote genenbank collecties : verspreiding, variatie en evaluatie van Syrische durum tarwe landrassen] [PhD thesis]
Elings, A. \ 1992
growth - crops - computer simulation - simulation - simulation models - gene banks - genetic resources - germplasm - resource conservation - plant genetic resources
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Diversity in cannabis [PhD thesis]
Meijer, E. de \ 1994
cannabidaceae - plant genetic resources - plant breeding
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Studies on breeding schemes in a closed pig population [PhD thesis]
Roo, G. de \ 1988
animal breeding - improvement - inbreeding - pigs - resistance - selection

Abstract:
Doel van dit modelonderzoek was het optimaliseren van fokprogramma's. Het onderzoek richtte zich op het fokbeleid voor een gesloten varkensbedrijf, aangezien dit een kleine populatie betreft, waarin zowel selectie als inteelttoename van belang zijn en waarbij het onduidelijk is hoe een optimaal fokbeleid eruit moet zien. De fokresultaten op een dergelijk bedrijf worden door veel factoren beinvloed, zoals de populatie-omvang en -structuur, de omvang van de uitgangspopulatie en de toe te passen selectie- en paringsstrategie. Effecten van variatie in een aantal van deze factoren op de fokresultaten en de inteelttoename zijn onderzocht. De studie kan, naast varkens- en koeienfokkers, ook van betekenis zijn voor bijvoorbeeld fokkers van zeldzame huisdieren

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The systematic description of cacao clones and its significance for taxonomy and plant breeding [PhD thesis]
Engels, J.M.M. \ 1986
biological nomenclature - classification - clones - cocoa - gene banks - genetic resources - germplasm - plant genetic resources - resource conservation - taxonomy - theobroma cacao
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Molecular determination and genetic modification of flower colour in Lilium spp [PhD thesis]
Fatihah Hasan Nudin, Nur \ 2018
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Towards a flexible plant breeders’ rights system in Kenya [PhD thesis]
Munyi, Peter Gitahi \ 2017
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Seeds as biosocial commons : an analysis of various practices in India [PhD thesis]
Patnaik, Archana \ 2016
rice - seeds - plant genetic resources - plant genetics - seed production - seed storage - community development - gender - social environment - india - rural development
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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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Potato quality traits: variation and genetics in Ecuadorian potato landraces [PhD thesis]
Cuesta Subía, Xavier \ 2013
solanum tuberosum - solanum - potatoes - landraces - wild relatives - quality - ideotypes - genetic variation - quantitative traits - breeding programmes - plant breeding - plant genetic resources - ecuador
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Exploiting wild tomato genetic resources for resistance to Tomato Yellow Leaf Curl Virus [PhD thesis]
Caro Rios, Carolina Myluska \ 2015
solanum lycopersicum - tomatoes - wild relatives - plant genetic resources - disease resistance - tomato yellow leaf curl virus - gene mapping - solanum habrochaites - introgression - plant breeding
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Adaptation of the brown planthopper, Nilaparvata lugens (Stål), to resistant rice varieties [PhD thesis]
Ferrater, Jedeliza B. \ 2015
insect pests - nilaparvata lugens - adaptation - oryza sativa - rice - cultivars - pest resistance - symbionts - yeasts - endosymbionts
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Management of rice seed during insurgency : a case study in Sierra Leone [PhD thesis]
Mokuwa, G.A. \ 2015
oryza glaberrima - oryza sativa - hybrid varieties - plant genetic resources - seeds - food security - family farms - farm management - west africa - sierra leone
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The conservation and use of crop genetic resources for food security [PhD thesis]
Khoury, C.K. \ 2015
plant genetic resources - genetic diversity - germplasm - agricultural development - climate adaptation - wild relatives - ex situ conservation - food security

Abstract:
Cum laude graduation Among the factors hindering the conservation of crop genetic resources is a lack of essential information regarding this diversity. Questions include: (a) what is the status of diversity in our food systems, and where are the greatest vulnerabilities?, (b) where can genetic diversity be found that can be useful in increasing productivity and mitigating these vulnerabilities?, (c) is this genetic diversity available in the present and in the long term?, and (d) what steps are needed to improve the ability for researchers to access genetic resources critical for present and future crop improvement? This thesis aims to contribute to the knowledge required to answer these questions through an exploration of the need for, potential of, challenges and constraints regarding, and necessary steps to enhance the conservation and use of crop genetic diversity.

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