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        Genetic variation for secondary seed dormancy and seed longevity in a set of black-seeded European winter oilseed rape cultivars.

        Author
        Schatzki, Jörg
        Allam, Mai
        Kloeppel, Coretta
        Nagel, Manuela
        Börner, Andreas
        Möllers, Christian
        Attention
        2299/11714
        Abstract
        Secondary seed dormancy in oilseed rape is a phenomenon that allows seeds to survive in the soil for many years without germination. Following soil cultivation, dormant seeds may germinate in subsequent years, and they are the main reason for the occurrence of volunteer oilseed rape plants in successive crops. Inheritance of secondary dormancy may be related to seed longevity (SL) in the soil. Genetic reduction in secondary dormancy and SL could provide a mean to reduce the frequency of volunteer plants and especially the dispersal of transgenic oilseed rape. The aim of the present study was to analyse secondary dormancy, germination rate and SL of 28 black-seeded winter oilseed rape cultivars using in vitro laboratory tests. The material was tested in field experiments at six different locations in Germany in 2008/2009. Significant effects of the genotype and the location on all traits were found. Heritability was high for secondary dormancy (0.97) and moderate for germination rate (0.70) and SL (0.71). Results indicate that a selection for low secondary dormancy would be effective.
        Publication date
        2013-04
        Published in
        Plant Breeding
        Published version
        https://doi.org/10.1111/pbr.12023
        Other links
        http://hdl.handle.net/2299/11714
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