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 / 34

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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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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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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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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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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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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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Conserving the genetic diversity of Bolivian wild potatoes [PhD thesis]
Cadima Fuentes, X. \ 2014
solanum - bolivia - wild relatives - crops - plant genetic resources - conservation - ex situ conservation - in situ conservation - gene banks - biosystematics - genetic diversity - collecting missions
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An ecogeographic analysis of Oryza series Sativae in Asia and the Pacific [PhD thesis]
Banaticla-Hilario, M.C.N. \ 2012
oryza - oryza sativa - oryza nivara - plant genetic resources - phytogeography - plant ecology - diversity - in situ conservation - plant morphology - taxonomy - genetics - gene banks - asia
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Quantitative methods for sampling of germplasm collections : getting the best out of molecular markers when creating core collections [PhD thesis]
Odong, T.L. \ 2012
sampling - germplasm - gene banks - plant genetic resources - statistics - molecular markers - statistical sampling techniques - crops
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Inducing multi-level institutional change through participatory plant breeding in southwest China [PhD thesis]
Li, J. \ 2012
plant breeding - plant breeding methods - farmers - small farms - participation - plant genetic resources - action research - institutions - innovations - china

Abstract:
The expansion of modern hybrid varieties in maize (Zea mays L.) in China has caused the rapid loss of local varieties, including farmer maintained varieties and landraces. With growing international recognition of the importance of agro-biodiversity conservation and on-farm crop improvement, participatory plant breeding has been accepted as a complementary strategy in modern agricultural research. Participatory plant breeding has been conducted in Guangxi province in the Southwest China since 2000. It has introduced technical options to the formal breeding programme as well as institutional options at a range of levels, including new, formalised benefit sharing arrangement among stakeholders. This study seeks to understand these challenges and, through action research to induce supportive multi-level institutional change through and for participatory plant breeding within the local socio-technical context. The core research questions of this study are: • What were the changes in the distribution of maize landraces and hybrids from 1998 to 2008 in the three southwest provinces, Guangxi, Yunnan and Guizhou? • What are the potentials of participatory plant breeding for maize hybrid improvement in this context? • How do the institutional changes in the organization of the seed supply system in China influence small holder-oriented seed supply? • What is the contribution of action researching to institutional innovation in the case of developing access and benefit sharing mechanisms in the context of the participatory plant breeding programme in southwest China? • How has public value been created, strengthened and rewarded through participatory plant breeding and related market mechanisms in selected cases?

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Potato landraces: description and dynamics in three areas of Ecuador [PhD thesis]
Monteros Altamirano, A.R. \ 2011
solanum - potatoes - wild relatives - landraces - solanum tuberosum subsp. andigena - solanum phureja - plant genetic resources - genetic diversity - genetic erosion - disease resistance - phytophthora infestans
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