Severity of papaya ringspot in different genotypes of the Solo group introduced in Cuba

The severity of Papaya ring-spot virus (PRSV-P) induced symptoms was evaluated in five papaya′s genotypes fromthe Solo group introduced in Cuba. Under field conditions different organs of plants were samples by grading from1 to 5. Additional, evaluations regarding incubation period, number of infected plants and disease intensity wereevaluated under the greenhouse conditions. The intensity of symptoms varies according to experimental conditions.In the fields conditions `Sunset′, `Baixinho de Santa Amalia′ and `Golden′ showed most intensities symptoms, whilethe rest behaved as moderate. Under greenhouse conditions `BH-65′ and `Sunset′ developed strong symptoms,`Golden′ and `Baixinho de Santa Amalia′ were intermediate and `Sunrise Solo′ was the less affected. `Sunset′,`Sunrise Solo′ and `Golden′ showed the most severe affectations in the fruits. In the fields less severe symptomswere developed in the leaves than those in other parts of the plant, and under the greenhouse conditions. These arethe firsts results obtained in Cuba about this genotypes from the Solo group vs PRSV-P, revealing important resultsfor the genetic breeding programs and varieties diversifications studies of this fruit.