Abstract
Most reliable transformation protocols for cereal crops, including sorghum (Sorghum bicolor L. Moench), rely on the use of immature embryo explants to generate embryogenic callus cells that are then transformed using Agrobacterium- or particle-bombardment-mediated DNA delivery. Subsequent to DNA transfer, most protocols rely on selectable markers for the recovery of stably transformed callus that is then regenerated to produce T0 plants. However, these protocols require specific genotypes that are innately capable of efficient embryogenic callus initiation. Here, we describe a system that makes use of the differential expression of the morphogenic regulators Baby Boom (Bbm) and Wuschel2 (Wus2) to achieve transformation in varieties of sorghum typically recalcitrant to standard transformation methods. © 2018 by John Wiley & Sons, Inc.
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