Tyson

Potato

Variety Description

Variety used for comparison: 'Sifra'

Summary: The lightsprout of 'Tyson' is medium sized and spherical in shape whereas that of 'Sifra' is small and ovoid. The base of the lightsprout of 'Tyson' has a strong to very strong intensity of anthocyanin colouration and sparse pubescence whereas that of 'Sifra' has a medium to strong intensity of anthocyanin colouration and a medium density of pubescence. The lightsprout tip for 'Tyson' has a strong to very strong intensity of anthocyanin colouration whereas that of 'Sifra' has an absent or very weak intensity of anthocyanin colouration. The plants of 'Tyson' have a semi-upright growth habit whereas the plants of 'Sifra' have an upright growth habit. The inner side of the corolla for 'Tyson' has a strong intensity of anthocyanin colouration whereas that of 'Sifra' has an absent or very weak intensity of anthocyanin colouration. The tuber of 'Tyson' has light yellow flesh whereas the tuber of 'Sifra' has cream coloured flesh.

Description:

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

PLANT: foliage structure is stem to intermediate type where foliage is open to half open and stems are clearly to partly visible, semi-upright growth habit, matures late in the season

STEM: low extent of anthocyanin colouration along entire stem

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

PEDUNCLE: low extent of anthocyanin colouration
INFLORESCENCE: medium to high frequency per plant, small to medium sized
FLOWER BUD: low extent of anthocyanin colouration
COROLLA: medium sized
COROLLA (INNER SIDE): high extent and strong intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration

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

Origin & Breeding History: 'Tyson' originated from a cross between 'Sylvana', as the female parent, and 'Curano', as the male parent, conducted in 2004 at the HZPC Research B.V. in Metslawier, Netherlands. 'Tyson' was selected from the resulting F1 in 2005, based on yield, internal and external tuber quality, and disease resistance.

Tests & Trials: The comparative trial for 'Tyson' was conducted by Global Agri Services Inc. during the 2019 growing season in Drummond, New Brunswick. The trial consisted of a single, 21 metre long row per variety. Each row contained 70 plants spaced 0.3 metres apart with an inter-row spacing of 0.9 metres.

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Potato: 'Tyson' (left) with reference variety 'Sifra' (right)