Cucurbit Genetics Cooperative Report 19:95 (article 37) 1996
Release of Watermelon Mosaic Virus (WMV) Resistant Watermelon Breeding Lines WM-1, WM-2, WM-3 and WM-4
The U.S. Department of Agriculture, Agricultural Research Service, has released WM-1, WM-2, WM-3 and WM-4 Watermelon mosaic virus 2 resistant breeding lines of watermelon (Citrullus lanatus). These lines are unique in that they are resistant to infection by the FC-1656 strain of WMV prevalent in Florida and demonstrate resistance in the greenhouse to the prevalent isolates of the virus from Arizona, California, Israel, Italy, and New York. In addition, plants which do become infected demonstrate milder symptoms than those produced in more susceptible lines.
These lines were developed at the Plant Genetic Resources Conservation Unit at Griffin, Georgia. WM-1, WM-2, WM-3 and WM-4 were selected from PI's 189316, 189317, and 248178 and 'Egun', respectively. Initial selections were made from 670 accessions evaluated in field and greenhouse tests, and selected resistant plants were selfed for 3-5 generations.
Breeder seed of WM-1, WM-2, WM-3 and WM-4 is available on a pro-rata basis to both public and private breeders. Requests should be sent to the Vegetable Curator, USDA, ARS, 1109 Experiment St., Griffin, GA 30223-1797 USA, or faxed to (770) 229-3324. It is requested that appropriate recognition be made if this germplasm contributes to the development of a new breeding line or cultivar.