Abstract
ABSTRACT Two approaches are being used to develop castor (Ricinus communis L.) cultivars with reduced levels of toxin. Conventional sexual hybridization was used to develop F6 lines of castor that have a 75-70% reduction in ricin + RCA toxins. The plants will be combined with transgenic castor plants which have a potential for > 99% reduction in ricin content. Subsequent selection in segregating generations should provide a 99.9% reduction in protein toxins allowing development of a very low toxin (VLT) castor cultivars. These cultivars would allow production of castor in the U.S. while increasing the value of the high protein meal remaining after extraction of the castor oil.
Published Version
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