Increased disease severity induced by some comoviruses in bean genotypes possessing monogenic dominant resistance to bean common mosaic potyvirus

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dc.creatorMorales, Francisco José
dc.creatorCastaño, M.
dc.date1992
dc.date2014-09-24T08:42:19Z
dc.date2014-09-24T08:42:19Z
dc.date.accessioned2026-06-27T14:28:03Z
dc.descriptionThree comoviruses isolated from diseased bean plants in Brazil (CV-BZ), Venezuela (CV-VZ), and Honduras (CV-HD) were inoculated to 53 bean genotypes possessing or lacking the dominant alleles of the necrosis (I) gene, which conditions resistance to bean common mosaic virus (BCMV). These comoviruses systemically infected all bean genotypes tested, predominantly inducing mosaic and plant malformation. Symptom expression was considerably enhanced in bean cultivars possessing the dominant I gene, particularly when infected by CV-VZ and CV-HD. The latter comovirus also induced necrotic symptoms in dominant I gene bean cultivars, regardless of the absence or presence of specific recessive genes, which protect the I gene against necrotic BCMV strains. The test comoviruses also induced top necrosis in two bean genotypes, Arbolito Retinto and Honduras 46, which do not possess the dominant alleles of the necrosis gene. The implications of these findings are important considering that most of the improved bean cultivars grown in Latin America, the United States, and Europe possess monogenic dominant resistance to BCMV and that some of the chrysomelid vectors of these comoviruses also are present in temperate countries.
dc.identifierhttps://hdl.handle.net/10568/43565
dc.identifier.urihttp://hdl.handle.net/123456789/79033
dc.languageen
dc.publisherScientific Societies
dc.rightsOpen Access
dc.subjectphaseolus vulgaris
dc.subjectcultivars
dc.subjectbean common mosaic virus
dc.subjectresistance
dc.subjectstrains
dc.subjectserology
dc.subjectvariedades
dc.subjectvirus del mosaico común frijol
dc.subjectresistencia
dc.subjectcepas
dc.subjectserologia
dc.titleIncreased disease severity induced by some comoviruses in bean genotypes possessing monogenic dominant resistance to bean common mosaic potyvirus
dc.typeJournal Article

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