What is the Colombia F8 coffee varietal?

Colombia F8 is a Cenicafé breeding line - the eighth backcross generation of a programme that started with the Colombia F1, itself a cross between Caturra and Híbrido de Timor. Each successive generation involved crossing back with high-quality Arabica parents, progressively recovering cup quality while retaining leaf rust resistance from HdT.

By the F8 stage, the Robusta genetic contribution from HdT has been substantially diluted. The significance is that each generation demonstrated something important: combining disease resistance with good cup quality is possible, you just have to work patiently at it.

Colombia F8 itself isn't widely planted commercially. Its importance is as evidence in the breeding argument - that the two goals aren't mutually exclusive - which informed the development of Castillo and other commercially released cultivars that followed.