Abstract
Huanglongbing (HLB) threatens the survival of the Florida citrus industry. The UF CREC citrus improvement team has made several significant contributions for the development of HLB resistant germplasm. Both conventional as well as genetically engineered cultivars have been developed that can grow in the presence of HLB. Among the two citrus improvement techniques, engineering citrus remains the fastest method for improvement of an existing commercial citrus cultivar and has been a key component in our overall citrus improvement strategy.