Iceberg Lettuce Breeding Lines with Resistance to Verticillium Wilt Caused by Race 1 Isolates of Verticillium dahliae

Davis, announce the release of two breeding lines of lettuce (Lactuca sativa L.). Lines RH08-0472 and RH08-0475 are F 9 iceberg-type lettuce breeding lines with resistance to verticillium wilt caused by V. dahliae. They were selected from the cross 'Tiber' ('La Brillante' 'Pacific'). Resistance is derived from 'La Brillante', a Batavia-type lettuce cultivar with resistance to Race 1 isolates of V. dahliae. These breeding lines are suitable for commercial production in both V. dahliaeinfested and non-infested fields. They are being released for commercialization of verticillium wilt-resistant iceberg cultivars and for use as parents in further breeding of resistant cultivars.