Novisel Veitía RodríguezBritta KowalskiLourdes R. GarcíaIdalmis Bermúdez-CaraballosoMayra Acosta-SuárezPedro Orellana PérezCarlos QuintanaNayanci Portal GonzálezReinaldo Quiñones Ramos2026-03-222026-03-22200710.1111/j.1439-0434.2007.01282.xhttps://doi.org/10.1111/j.1439-0434.2007.01282.xhttps://andeanlibrary.org/handle/123456789/47327Citaciones: 22Abstract Reaction to the culture filtrate of Alternaria solani (Sorauer) was used as an indicator in an in vitro screening test to select lines with decreased field susceptibility to early blight from a population of 1000 putative mutants. Plantlets of cv. ‘Desirée derived from irradiated callus of potato were inoculated in vitro with a culture filtrate of A. solani (Sorauer). Of the 45 lines selected and subsequently evaluated under conditions of natural infection in the greenhouse six showed lesser degrees of early blight infection than the cv. Desirée control. The six lines selected in the greenhouse retained lower degrees of infection during 2 years of field trials.enBiologyAlternaria solaniBlightInoculationCallusHorticulturePopulationIn vitroGreenhouseBotanyarticle