Arabica
Hibrido de Timor
Also known as: Timor Hybrid, HdT
Hibrido de Timor ( Timor Hybrid ) is a natural interspecific hybrid between Arabica and Robusta, discovered on the island of Timor . It is one of the most important varieties in coffee breeding history, as it is the source of rust resistance in Catimor , Sarchimor , and many other resistant varieties.
Key Takeaways
- Hibrido de Timor is a natural interspecific hybrid between Arabica and Robusta, discovered on the island of Timor in the 1920s.
- Hibrido de Timor is the most important source of rust resistance in Arabica coffee breeding.
- Hibrido de Timor is a parent of Catimor, Sarchimor, Colombia variety, Castillo, Ruiru 11, and many other resistant varieties.
- Hibrido de Timor is a tetraploid (like Arabica), which allows it to be crossed with Arabica varieties.
- The Robusta ancestry in Hibrido de Timor provides resistance to coffee leaf rust, coffee berry disease, and some nematodes.
Hibrido de Timor ( Timor Hybrid ) is a natural interspecific hybrid between Arabica and Robusta, discovered on the island of Timor . It is one of the most important varieties in coffee breeding history, as it is the source of rust resistance in Catimor , Sarchimor , and many other resistant varieties.
Hibrido de Timor (Timor Hybrid) is a natural interspecific hybrid between Arabica and Robusta, discovered on the island of Timor. It is one of the most important varieties in coffee breeding history, as it is the source of rust resistance in Catimor, Sarchimor, and many other resistant varieties.
Origin
Island of Timor (Indonesia/Timor-Leste). Natural interspecific hybrid of Arabica and Robusta.
History
Hibrido de Timor was discovered on the island of Timor (divided between Indonesia and Timor-Leste) in the 1920s. It is a natural interspecific hybrid between Arabica (Coffea arabica) and Robusta (Coffea canephora). The hybrid was discovered when farmers noticed trees that had Arabica-like beans but were resistant to coffee leaf rust, which was devastating the region. Hibrido de Timor was collected and distributed to coffee research stations worldwide. It became the most important source of rust resistance in Arabica coffee breeding, serving as a parent of Catimor, Sarchimor, Colombia variety, Castillo, Ruiru 11, and many other resistant varieties.
Discovery
Discovered on the island of Timor in the 1920s.
Genetics and Lineage
Hibrido de Timor is a natural interspecific hybrid between Coffea arabica and Coffea canephora (Robusta). It is a tetraploid (like Arabica), which allows it to be crossed with Arabica varieties. The Robusta ancestry provides resistance to coffee leaf rust and other diseases.
Parent Varieties
Hybrid Status: Hibrido de Timor is a natural interspecific hybrid between Arabica and Robusta. It is not a cultivated coffee variety itself but is used as a parent in breeding programs.
Growth Characteristics
Hibrido de Timor is a tall, vigorous tree. It has Arabica-like beans but Robusta-like resilience.
Tree Size: Tall (3 to 4 meters at maturity)
Yield: Moderate.
Disease Resistance: High resistance to coffee leaf rust (the primary reason for its importance in breeding). Also resistant to coffee berry disease and some nematodes.
Climate and Growing Conditions
Hibrido de Timor thrives in tropical conditions and is adaptable to a range of environments.
Climate Preferences: Tropical climate. Adaptable.
Rainfall: 1,500 to 2,500mm annually.
Elevation Range: 500-1,500 meters
Processing Compatibility
Compatible with all processing methods, though it is primarily used for breeding, not commercial coffee production.
Roasting Behavior
Hibrido de Timor beans are medium density.
Cup Profile
Hibrido de Timor itself is not commonly consumed as a standalone variety. Its cup quality is generally inferior to pure Arabica, but it is used for breeding,...
Acidity
Low to medium.
Sweetness
Moderate.
Body
Medium to full.
Professional Cupping Notes
Not commonly cupped as a standalone variety.
Common Defects
- •Cup quality is inferior to pure Arabica
- •Primarily used for breeding, not direct consumption
Brewing Recommendations
Not commonly brewed as a standalone variety.
Countries Where Grown
Notable Farms
Interesting Facts
- •Hibrido de Timor is a natural interspecific hybrid between Arabica and Robusta, discovered on the island of Timor in the 1920s.
- •Hibrido de Timor is the most important source of rust resistance in Arabica coffee breeding.
- •Hibrido de Timor is a parent of Catimor, Sarchimor, Colombia variety, Castillo, Ruiru 11, and many other resistant varieties.
- •Hibrido de Timor is a tetraploid (like Arabica), which allows it to be crossed with Arabica varieties.
- •The Robusta ancestry in Hibrido de Timor provides resistance to coffee leaf rust, coffee berry disease, and some nematodes.
Frequently Asked Questions
Sources
- •World Coffee Research
- •Centro de Investigação das Ferrugens do Cafeeiro (CIFC)
Related Varieties
Arabica Coffee Varieties: Origin, Flavor & Genetics
Arabica is known for its complex, aromatic, and nuanced flavor. It generally has higher acidity, lighter body, and more aromatic complexity than Robusta. Notes range from floral and citrus (highland African) to chocolate and caramel (Central and South American). Sweetness is generally high, with clean, balanced cups being the hallmark of quality Arabica.
ArabicaBatian
Batian was developed to combine disease resistance with the cup quality of SL28. Well-grown Batian produces a bright, juicy cup with notes of blackcurrant,...
ArabicaCastillo
Castillo's cup quality is debated. Well-grown Castillo at high elevations can produce clean, balanced cups with notes of chocolate, caramel, citrus, and mild...
ArabicaCatimor
Catimor's cup quality varies widely depending on the specific line, growing conditions, and processing. Well-grown Catimor can produce clean, balanced cups...
ArabicaColombia Variety
The Colombia variety produces a clean, balanced cup with medium acidity, medium body, and notes of chocolate, nuts, caramel, and mild citrus. The cup is good...
RobustaRobusta Coffee: Flavor, Caffeine & Growing Regions
Bold, strong, and earthy. Known for heavy body, low acidity, and notes of dark chocolate, nuts, and grain. Can exhibit earthy, woody, or rubbery notes in lower-quality lots. Fine Robusta (carefully processed) can produce a cleaner, sweeter cup with chocolate and caramel notes.
ArabicaRuiru 11
Ruiru 11's cup quality is debated. Well-grown Ruiru 11 can produce a bright, fruity cup reminiscent of SL28 but generally with less complexity and intensity....
ArabicaSarchimor
Sarchimor's cup quality varies by line and growing conditions. Well-grown Sarchimor can produce clean, balanced cups with notes of chocolate, nuts, and...
Related Encyclopedia Entries
Castillo Coffee Variety
Castillo is Colombia's most widely planted variety, bred by Cenicafé as a disease-resistant descendant of Catimor. Successive selections improved cup quality significantly, and well-grown Castillo from high-altitude farms in Caldas and Nariño delivers sweet, balanced cups that far exceed its reputation.
Origins & GeographyCoffea Arabica: The Specialty Coffee Species Explained
Arabica coffee (Coffea arabica) is a species of coffee plant native to the highland forests of Ethiopia and South Sudan. It is the most widely cultivated coffee species worldwide, accounting for approximately 60 to 70 percent of global coffee production. Arabica is prized for its complex flavor, refined acidity, and aromatic diversity, producing notes ranging from floral and citrus to chocolate and caramel depending on origin, variety, and processing.
Origins & GeographyCoffea Robusta: The Hard-Body Coffee Species Explained
Robusta coffee (Coffea canephora) is the second most cultivated coffee species after Arabica, accounting for approximately 30 to 40 percent of global coffee production. Native to sub-Saharan Africa, Robusta is hardier, more disease resistant, and grows at lower elevations than Arabica. It contains roughly twice the caffeine of Arabica and produces a heavier body, lower acidity, and more bitter cup profile.
Coffee ScienceCoffee Leaf Rust
Hemileia vastatrix belongs to the order Pucciniales and is an obligate biotrophic fungus, meaning it requires living host tissue to survive. The infection cycle begins when urediniospores are deposited on the abaxial (underside) surface of the coffee leaf, typically via wind or rain splash. Germination occurs only in the presence of free water—such as dew or rainfall—within a temperature range of 15°C to 28°C. Upon germination, the fungus enters the leaf through the stomata and establishes a mycelium that colonizes the internal tissue. The visual manifestation of the disease begins as small, chlorotic spots that expand into characteristic orange, powdery pustules. These pustules contain thousands of spores capable of further infection. The physiological impact includes a rapid reduction in photosynthetic capacity and the eventual abscission of the leaf. Severe cases lead to 'dieback,' where the plant's branches wither due to carbohydrate depletion, often resulting in the death of the tree or a total loss of the following year's crop.
Coffee ScienceExtraction
Extraction is the process of dissolving soluble compounds from ground coffee into water, producing the beverage we know as coffee. During extraction, water pulls acids, sugars, lipids, carbohydrates, and melanoidins from the coffee grounds in a sequence that shapes flavor, body, and aroma.
Related Book Chapters
- •Chapter 4: Varietals & Cultivars
- •Chapter 2: Coffee Origins
- •Chapter 13: The Future of Coffee
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Keith E. Lyons
Author, Researcher & Coffee Educator
Keith E. Lyons is the author of The Complete World of Coffee and the publisher behind Lyons Den Publishing. A licensed trauma therapist turned specialty coffee writer, Keith blends scientific rigor with genuine passion for the craft of coffee.
Last Reviewed
August 10, 2026
Sources & References
(2)Claims are cited to verifiable sources. Peer-reviewed research is marked.
- 1World Coffee Research
- 2Centro de Investigação das Ferrugens do Cafeeiro (CIFC)
Authoritative References
Editorial Standards
- • Fact-checked against peer-reviewed coffee science research and industry standards.
- • Reviewed by the author with documented sources for every factual claim.
- • Updated regularly; the "Last Reviewed" date reflects the most recent verification.
- • Corrections are made promptly when new research or evidence emerges.
Our editorial process prioritizes accuracy, scientific rigor, and practical relevance for coffee enthusiasts and professionals alike.
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