Summary
The aim of this study was to evaluate the interest of beginning the selection process on a new genetic characteristic, cleistogamy, to manage gene flow in oilseed rape. The first step was to introduce this characteristic in an existing model of gene flow between oilseed rape populations in time and space, GeneSys-Rape. The second step was to evaluate the parameters of the model linked to this characteristic using field experimentations. Cleistogamous oilseed rape was shown to have an autogamy rate as high as 94% and to emit 10 times less pollen than an open-flowered oilseed rape in the same conditions. But the cleistogamous character was also shown to be unstable in the genotypes tested. The third step was to evaluate the interest of cleistogamy using simulations comparing several genotypes with or without cleistogamy in two different cropping systems. These simulations showed that an oilseed rape both dwarf and cleistogamous was interesting to limit gene escape and that a 99%-autogamous oilseed rape was interesting to limit both gene escape from and harvest contamination of the 99%-autogamous oilseed rape.
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Fargue, A., Colbach, N., Pierre, J. et al. Predictive study of the advantages of cleistogamy in oilseed rape in limiting unwanted gene flow. Euphytica 151, 1–13 (2006). https://doi.org/10.1007/s10681-005-9005-3
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DOI: https://doi.org/10.1007/s10681-005-9005-3