J. A. D. Anderson

‘Karaka’: A new fresh market potato with high resistance to Globodera pallida and G. rostochiensis

Abstract ‘Karaka’ is a new potato cultivar with high resistance to all populations of potato cyst nematode (Globodera pallida and G. rostochiensis) that occur in New Zealand. Its main market niche is as an early to early maincrop fresh market potato, and it has some potential for french fry production.

‘Gladiator’: A new potato cultivar with high resistance to potato cyst nematode and powdery scab suitable for french fries and fresh market

Abstract ‘Gladiator’ is a new maincrop potato (Solanum tuberosum L.) cultivar with resistance to both potato cyst nematode species (Globodera rostochiensis and G. pallida) and powdery scab (Spongospora subterranea). It has long oval, block‐shaped tubers suitable for french fry manufacture when mature and for fresh market when still immature.

‘Moonlight’: A new dual‐purpose main crop potato (Solanum tuberosum) cultivar

Abstract ‘Moonlight’ is a new early‐main to main crop potato (Solanum tuberosum) cultivar with high yield potential that has been developed for both the fresh market and French fry production. Tubers are oval and have white flesh. ‘Moonlight’ has moderate resistance to the cream potato cyst nematode (Globodera pallida) and has the H1 gene for resistance to G. rostochiensis. It also has moderately high resistance to powdery scab (Spongospora subterranea) and bacterial soft rot (Erwinia sp.)

‘Dawn'—a new early‐maincrop fresh market/crisping potato cultivar

Abstract ‘Dawn’ is a new, high‐yielding, early‐maincrop potato (Solanum tuberosum L.) cultivar suited to the fresh market and crisp manufacture. Tubers are round‐oval in shape and have white flesh. This variety has moderate resistance to late blight (Phytophthora infestans) and to powdery scab (Spongospora subterranea).

‘White Delight’: A new maincrop fresh market potato cultivar

Abstract ‘White Delight’ is a new, high yielding, maincrop potato (Solarium tuberosum L.) cultivar suitable for the fresh market and crisp manufacture. Tubers are round—oval in shape and have white flesh. This variety has moderate resistance to late blight (Phytophthora infestans) and to bacterial soft rot (Erwinia sp.).

Effects of specific gravity and cultivar on susceptibility of potato (Solanum tuberosum) tubers to blackspot bruising and bacterial soft rot

Abstract Ten potato (Solanum tuberosum) cultivars were assessed for resistance to bacterial soft rot caused by Erwinia carotovora subsp. atroseptica, and to blackspot bruising. Specific gravities of individual potato tubers varied within each cultivar and between cultivars. Within all 10 cultivars tested, as tuber‐specific gravity increased, the severity of bacterial soft rot decreased, and the severity of bruising increased. Among the seven New Zealand‐bred cultivars, mean soft rot susceptibilities lay along a continuum, with cultivars having higher mean soft rot losses as mean specific gravity increased. Two of the three overseas cultivars exhibited very different responses from those bred in New Zealand. In contrast, for blackspot bruising, six of the New Zealand‐bred cultivars and two overseas cultivars lay approximately on a continuum of increasing mean bruise score as mean specific gravity increased, similar to the within‐cultivar relationships. The remaining New Zealand‐bred cultivar and the overseas cultivar ‘Fianna’ were quite different, having much lower mean bruise scores than predicted by the trend line of the other cultivars. ‘Fianna’ in particular exhibited both low bruising and low soft rot incidence in this experiment.

‘Pacific’: A new fresh market and crisping potato cultivar

Abstract ‘Pacific’ is a new mid‐season to main‐crop potato (Solanum tuberosum L.) cultivar suitable for both crisping and the fresh market. Tubers are round to round‐oval with light yellow flesh. ‘Pacific’ has partial resistance to the cream potato cyst nematode (Globodera pallida).

‘Driver’: A new, early, fresh market potato cultivar

Abstract ‘Driver’ is a new early to mid‐season potato (Solanum tuberosum L.) cultivar developed mainly for the fresh market. Tubers are round–oval in shape and have white flesh. ‘Driver’ has moderate resistance to the cream potato cyst nematode (Globodera pallida). It also has moderate resistance to powdery scab (Spongospora subterranea) and to bacterial soft rot (Erwinia sp.).

'Red Rascal' : a new red-skinned, fresh market potato

Abstract ‘Red Rascal’ is an attractive, oval‐shaped, bright red‐skinned potato (Solanum tuberosum L.) cultivar with white flesh. It is mid‐late season maturing and is suitable for prepack/ fresh market sales. This cultivar has shown high resistance to powdery scab (Spongospora subterranea) and late blight (Phytophthora infestans).

‘Kiwitea’: A new processing potato cultivar

Abstract ‘Kiwitea’ is a new early‐mid season maturing potato (Solanum tuberosum L.) that has been developed mainly for the french fry industry. Tubers are round‐oval to oval in shape and have white flesh. Sugar levels are generally low. ‘Kiwitea’ is sufficiently early maturing to process well from the field as a second early potato, and also stores well for later processing out of storage.