Broadening the genetic base of onion to develop better-adapted varieties for organic farming systems
- 139 Downloads
As organic farming refrains from high and chemical inputs it needs varieties better adapted to organic conditions to improve the yield stability and quality of crops. In order to make genebank accessions more accessible for the utilisation in organic breeding programmes, a participatory research project with farmers was carried out in 2002 and 2003. From the Dutch genebank collection 37 onion accessions, divided into five different groups (according to their market use), were selected and planted at a commercial organic farm. Farmer participation in characterisation and evaluation of the material resulted in including additional plant traits for genebank characterisation as well as new selection criteria for breeding. It also provided researchers insight into how organic farmers evaluate and value certain plant traits. Variation for important properties was found within and between the five groups. To establish base populations, the farmers, in collaboration with the researchers, selected the best genotypes within the five groups of onion accessions. The new base populations may be exploited in order to achieve better-adapted material for organic farming systems.
Key wordsbase populations characterisation of gene bank accessions onion (Allium cepa) organic agriculture organic plant breeding participatory selection
Unable to display preview. Download preview PDF.
- Boukema, I.W., 1999. Current status of the CGN Allium collection. In: L. Maggioni, D. Astley, H. Rabinowitgh, J. Keller & E. Lipman (Compilers), Report of a Working Group on Allium, Sixth meeting, 23–25 October 1997, Plovdiv, Bulgaria, pp. 44–45. IPGRI, Rome, Italy.Google Scholar
- De Melo, P.E., 2003. The root systems of onion and Allium fistulosum in the context of organic farming: A breeding approach, pp. 127. Ph.D. Thesis, Wageningen University, Wageningen, The Netherlands.Google Scholar
- IPGRI, ECP/GR, AVRDC, 2001. Descriptors for Allium (Allium spp.). International Plant Genetic Resources Institute, Rome, Italy; European Cooperative Programme for Crop Genetic Resources Networks (ECP/GR), Asian Vegetable Research and Development Centre Taiwan.Google Scholar
- Lammerts van Bueren, E.T., P.C. Struik & E. Jacobsen, 2002. Ecological concepts in organic farming and their consequences for an organic ideotype. Neth J Agric Sci 50: 1–26.Google Scholar
- Lammerts van Bueren, E.T., R. van den Broek & C. ter Berg, 2003. Passende Rassen: uien-rassenonderzoek voor biologische bedrijfs-systemen 2001–2002, pp. 60. Louis Bolk Instituut, Driebergen/ Praktijkonderzoek Plant en Omgeving-AGV, Lelystad.Google Scholar
- Lammerts van Bueren, E.T., L.J.M. van Soest, L. de Groot, I.W. Boukema, A.M. Osman, 2004. Karakteriseren en beoordelen van genenbankmateriaal van zaai-uien voor de biologische landbouw. 32 pp. Louis Bolk Instituut/Centrum voor Genetische Bronnen in Nederland.Google Scholar