This project is a collaboration involving the Roose and Close labs at UCR and the Fred Gmitter and Jose Chaparro labs at the University of Florida. The main goal is to develop genetic linkage maps of sweet orange and trifoliate orange. Genetic linkage maps are used to improve the efficiency of breeding and to identify genes that, if altered using biotechnology, would confer desired traits on the plant. The maps developed under this project will be the most detailed and accurate available for citrus. CRB funding enables us to obtain matching funds from the UC Discovery program (about $1.35 for each $1 of CRB funds).