Toronto

Potato

Variety Description

Variety used for comparison: 'Bintje'

Summary: The tip of the lightsprout of 'Toronto' has an asent or very sparse to sparse density of pubescence while that of 'Bintje' has medium to dense pubescence. . The stem of 'Toronto' has a low extent of anthocyanin colouration halfway up the stem while the stem of 'Bintje' has a medium extent of anthocyanin colouration along the entire stem. The second pair of lateral leaflets of 'Toronto' are medium sized while those of 'Bintje' are large. The plants of 'Toronto' mature mid to late in the season while those of 'Bintje' mature late to very late in the season. The tuber of 'Toronto' is long oval in shape with light beige skin and eyes of shallow to medium depth while the tuber of 'Bintje' is long with yellow skin and deep to very deep eyes.

Description:

LIGHTSPROUT: medium sized, ovoid, medium number of root tips, short lateral shoots
LIGHTSPROUT BASE: strong intensity of anthocyanin colouration, high proportion of blue in anthocyanin colouration, absent or very sparse to sparse pubescence
LIGHTSPROUT TIP: small in relation to base, closed habit, strong intensity of anthocyanin colouration, absent or very sparse to sparse pubescence

PLANT: stem type foliage structure where foliage is open and stems are clearly visible, upright to semi-upright growth habit, medium to high frequency of flowers, matures mid to late season

STEM: low extent of anthocyanin colouration halfway up the stem

LEAF: medium sized outline, open, medium presence of secondary leaflets, medium green upper side, medium extent and weak to medium intensity of anthocyanin colouration on upper side of midrib, absent or very low frequency of coalescence of terminal and lateral leaflets
SECOND PAIR OF LATERAL LEAFLETS: medium sized, leaflet is narrower than long
LEAFLET: weak degree of waviness of margin, medium depth of veins, dull on upper side, pubescence absent on blade at apical rosette

PEDUNCLE: absent or very low extent of anthocyanin colouration
INFLORESCENCE: medium sized
FLOWER BUD: weak extent of anthocyanin colouration
COROLLA: medium sized
COROLLA (INNER SIDE): absent or very low extent and absent or very weak intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration

TUBER: long oval, light yellow flesh
TUBER EYE: shallow to medium depth, yellow at base
TUBER SKIN: light beige, absent or very weak anthocyanin colouration in reaction to light

Origin & Breeding History: 'Toronto' (experimental designation D 03-11-01) originated from a cross conducted between 'A092-021', as the female parent, and 'BRU 93-136', as the male parent, in the J.P. van Loon breeding program in Dronten, Netherlands in 2002. Seed from the cross was grown in a greenhouse in 2003 with resulting tubers planted in the field in Dronten, Netherlands in 2004. D 03-11-01 was selected in 2004 based on time of maturity, disease resistance, processing and tablestock qualities, tuber shape and flesh colour.

Tests & Trials: The comparative trial for 'Toronto' was conducted by Global Agri Services Inc. during the 2021 growing season in Central Blissville, New Brunswick. The field trial consisted of a single, 20 metre long row per variety. Each row contained 65 plants spaced 0.3 metres apart with inter-row spacing of 1.1 metres. Measurements were taken from 10 plants, or 10 parts of plants, of each variety. Lightsprout characteristics were assessed on 10 tubers harvested from the comparative trial and observed approximately 2.5 to 3 months after sprouting was promoted by exposing the tubers to an external agent.

Click on image for larger view

Potato: 'Toronto' (left) with reference variety 'Bintje' (right)

Click on image for larger view

Potato: 'Toronto' (left) with reference variety 'Bintje' (right)