Molecular marker variability for southern root-knot nematode resistance in sweetpotato |
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Authors: | Mwamburi Mcharo Don R LaBonte Chris Clark Mary Hoy James H Oard |
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Institution: | (1) Louis Bolk Institute (LBI), Hoofdstraat 24, NL-3972 LA Driebergen, The Netherlands;(2) Centre for Genetic Resources, The Netherlands (CGN), P.O. Box 16, NL-6700 AA Wageningen, The Netherlands |
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Abstract: | Summary 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. |
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Keywords: | base populations characterisation of gene bank accessions onion (Allium cepa) organic agriculture organic plant breeding participatory selection |
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