Seedless Valencia Oranges
Claire Federici (UC Riverside, Dept. of Botany and Plant Sciences) examines Olinda Valencia oranges, hoping to locate seedless fruit. This group of Valencia trees are part of a long-running plant breeding project at Lindcove that is headed by Dr. Mikeal Roose, and is the same project that has brought low-seeded mandarins to global markets. The Valencia trees were grown from irradiated budwood, which has the intended result of occasionally disrupting the genes that promote seed formation. If a tree is found to have low-seeded fruit, then its budwood is likely to produce low-seeded fruit, and a new low-seeded line of Olinda is created!
While several varieties of seedless or low-seeded Valencias are commercially available, notably Delta and Midknight, the popular seedy Olinda variety is favored by San Joaquin Valley growers for high productivity and tolerance of hot summers.
Claire Federici looking for seedless Valencias