What is Híbrido de Timor?

Híbrido de Timor (HdT) is a naturally occurring hybrid between Coffea arabica and Coffea canephora (Robusta) discovered in Timor-Leste in the mid-20th century. It's one of the very few documented natural interspecific hybrids of these two species - and its discovery changed the trajectory of coffee breeding worldwide.

The significance is in what it carries: natural resistance to coffee leaf rust, inherited from its Robusta parent, combined with enough Arabica genetics to produce fertile offspring when crossed back with Arabica. That made it an extraordinarily useful breeding tool.

Catimor, Sarchimor, Castillo, Lempira, Ruiru 11, and dozens of other cultivars planted across the world today exist because of HdT's genetics. It's not commercially cultivated at meaningful scale - it's the unsung genetic source behind most of the world's rust-resistant Arabica production. When you read about any disease-resistant cultivar in this glossary, there's a good chance HdT is somewhere in the family tree.