A High-throughput Platform for the Production and Analysis of Transgenic Cassava ( Manihot esculenta ) Plants
2012
A platform for high-throughput production and analysis of transgenic cassava (Manihot esculenta) has been developed for the variety 60444 and implemented to generate plants expressing traits for nutritional enhancement, modified metabolism, promoter analysis and disease resistance. Over a three and a half year period this system has been utilized to produce more than 3500 independent transgenic plant lines from 50 different genetic constructs within a single laboratory. Plants recovered through this system have proven robust and efficacious for engineered traits under greenhouse conditions and within the first confined field trials of transgenic cassava carried out in Uganda, Kenya, Nigeria and Puerto Rico. Detailed procedures are described for the operation of this platform, including all steps in tissue culture, genetic transformation, copy number estimation, greenhouse establishment for shoot and storage root formation and systems for centralized quality control, transgenic plant tracking and regulatory compliance. In addition to providing reliable transgenic plant production for proof of concept studies in the variety 60444, the systems implemented and described here form the structure for high throughput production of transgenic farmer-preferred cultivars of cassava.
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