Ulster Chieftain is a very early to early maturing potato with a semi-erect growth habit and white flowers. The tubers are oval with white to yellow skin and white flesh, featuring medium to shallow eyes. It has good resistance to potato virus A and tobacco rattle virus, but is susceptible to late blight and low resistance to common scab. The variety is best suited for mealy to fairly firm cooking and has poor suitability for crisping and French fries.
Tuber Characteristics
- Tuber skin colour: White to yellow
- Tuber eye colour: Yellow
- Primary tuber flesh colour: White
- Tuber shape: Oval
- Eye depth: Medium to shallow
- Tuber skin texture: Smooth to intermediate
Tubering Characteristics
- Yield potential: Low to medium-high
- Tubers per plant: Medium to many
- Tuber size: Medium to large
- Tuber shape uniformity: Uniform
- Internal rust spot: Infrequent
- Resistance to external damage: Moderate
- Dormancy period: Medium to long
Utilisation Characteristics
- Cooking type: Mealy (floury type) to fairly firm (multi-purpose type)
- After cooking blackening: Little
- Taste: Good
- Crisp suitability: Poor
- French fry suitability: Poor
- Dry matter content: Low to medium
- Starch content: Low to medium
Resistance to Fungal Diseases
- Late blight on tubers: Very low to high
- Late blight on foliage: Very low to high
- Wart (Synchytrium endobioticum): Field immune (Race 1)
- Gangrene (Phoma foveata): Medium
- Dry rot (Fusarium spp.): Low
Resistance to Bacterial Diseases
- Common scab (Streptomyces scabies): Low to medium
Resistance to Virus Diseases
- Potato virus A: Very high
- Potato virus X: Low
- Potato virus Y (strain not specified): Medium to high
- Potato leaf roll virus: Low to medium
- Tobacco rattle virus: High