Using the genealogical method of selection it were obtained Genealogical two new varieties resistant against to main tobacco diseases in Cuba. One called Havana 2.1.1 obtained from the cross Corojo x Bel 61-9, which was called Havana 2.1.1, is an early dark tobacco resistant to: blue mould disease caused by Peronospora tabacina Adam, the black shank caused by Phytophthora parasitica variety nicotianae, to tobacco mosaic virus called TMV and to weather fleck; the other variety Havana 16.50.3, is the result of a selection from a double cross: Criollo x Pulawski by Escambray -70 x PBD6 through which were combined into a single genotype resistance to blue mould, to the black shank and to TMV. The agricultural technique was conduced in irrigation conditions.
The two obtained varieties have a small potential yield and a relatively low organoléptical quality than the traditional varieties, because of these limitations they are not considered for the future as commercial varieties. They are recommended as an excellent basic material for the genetic improvement of the Cuban dark tobacco.