HortScience · 1980 · 32 citations · 0 references
AgriculturePlant PathologyPlant SciencesPlant GeneticsPlant VirologyVirologyManagement Of Plant Viral DiseasesPlant Disease ResistancePlant PathogenesisPlant Virus ResistancePlant VirusesResistance Breeding For Viral DiseasesPlant IntroductionPlant Viral PathogenesisViral Diseases Of CropsVirus DiseasesVirus-resistant PlantsVirus-resistant Varieties
Abstract A source of resistance to widespread and severe mosaic caused by cucumber mosaic virus (CMV) on late summer-grown lettuce in New York State was found in plant introduction (PI) 261653, an accession of Lactuca saligna L. from Portugal. Resistance to CMV was dominant in F 1 plants of L. saligna × L. sativa L. However, this resistance was proved to be viral strain specific, necessitating the search for an additional source for the control of a newly recognized strain of CMV able to infect PI 261653 systemically.