Ambra

Potato

Variety Description

Variety used for comparison: 'Adora'

Summary: 'Ambra' has white flowers while 'Adora' has red-violet flowers. 'Ambra' has an oval shaped tuber while 'Adora' has an oblong tuber. 'Ambra' has a larger light sprout than 'Adora'. The light sprout is broad cylindrical in shape for 'Ambra' while it is ovoid for 'Adora'. 'Ambra' has stronger anthocyanin on the light sprout base than 'Adora'.

Description:

'Ambra' has a semi-upright growth habit and produces an intermediate type plant. The stems are thin to medium and have weak anthocyanin colouration which is distributed in the leaf axils and upwards on the stem. The nodes have low swelling.

'Ambra' has medium green leaves and an intermediate leaf silhouette. The leaf rachis and petiole have weak anthocyanin colouration. The terminal leaflet is medium ovate in shape with an acuminate shaped tip and cordate shaped base. The terminal and lateral leaflets have an absent or very low frequency of coalescence. The lateral leaflets are medium to large in size and are narrowly ovate in shape with an acute shaped tip and cordate shaped base. The leaf veins are medium in depth. The terminal and lateral leaflets have weak waviness of the margin and have medium glossiness of the upper surface. The leaf blades have sparse pubescence at the apical rosette. The presence of secondary leaflets is medium.

'Ambra' has a medium to high flowering profusion and a medium inflorescence size. The flower buds are strongly persistent and have strong to very strong anthocyanin colouration. The corolla is white in colour. The corolla is medium to large in size and has a moderately prominent star. The peduncle has weak to medium anthocyanin colouration.

The tubers have yellow skin with yellow colour at the base of the eye. The skin develops medium anthocyanin colouration when exposed to light. The skin texture is smooth and the tubers are oval in shape. The tuber eyes are shallow in depth and are predominantly apical in distribution. The tuber eyebrows are not prominent. The tuber flesh is medium yellow in colour with no secondary colour present.

'Ambra' has a large light sprout which is broad cylindrical in shape. The light sprout base has very strong anthocyanin with an absent to low proportion of blue. The base has medium pubescence. The tip of the light sprout is smaller in size in relation to the base. The tip has a closed habit and has absent to very weak anthocyanin colouration. The tip has dense pubescence. There are a medium number of root tips and the lateral roots are short to medium in length.

Origin & Breeding History: 'Ambra' originated from a cross between 'Berber' and 'Caesar', made in Metslawier, The Netherlands in 1989. Selection criteria included yield, quality, disease resistance, pest resistance and agronomic characters.

Tests & Trials: Trials for 'Ambra' were conducted in North Tilley, New Brunswick in 2004. A randomized block design was used with four replicates per variety. All entries were planted in single-row plots and each entry had one replicate per block. Plots consisted of rows 5.5 meters long and between row spacing of 91 cm. Measured characteristics were based on 10 measurements. Colour determinations were made using the RHS colour chart.

Comparison table for 'Ambra' with reference variety 'Adora'

Colour of corolla (RHS)