A University of Florida Research Foundation Professor, located at the Citrus Research and Education Center (UF-CREC). He has worked on citrus breeding, genetics, and genomics for more than 30 years. Research topics have included development of marker-assisted selection tools; host-pathogen interactions; genetic control of fruit color, flavor and aroma; disease resistance; and market/consumer-driven approaches to citrus breeding. He led the International Citrus Genome Consortium to release the first publicly available whole genome sequence resources in 2011.