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.
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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.
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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