Resistance in natural populations of three wild Lactuca species from Israel to highly virulent Californian isolates of Bremia lactucae

摘要: Seedlings of 213 accessions representing 9, 14, and 10 Israeli natural populations the wild Lactuca serriola, L. saligna, aculeata, respectively, were initially screened for their resistance to a pathotype CAVIII isolate Bremia lactucae. All 60 serriola susceptible while all 83 saligna resistant. Out 69 aculeata accessions, 36 (52.2 %) From those resistant 56 23 L. then tested at seedling stage reaction against five highly virulent isolates originating from California two current major pathotypes novel type B. lactucae; true leaves adult plants also with out these isolates. Our study supports previous observations that is However, our results provide additional evidence may not be an absolutely non-host plant lactucae least stage, which in agreement other recent data this species. Sixteen (69.6 %) expressed tested, even as well plants. This probably first report detailed screening some aculeata. These patterns reactions show species within primary lettuce gene pool, should considered attractive source germplasm breeding cultivated (L. sativa).