Petoskey

Potato

Variety Description

Variety used for comparison: 'Snowden'

Summary: The base of the lightsprout of ‘Petoskey' has a medium intensity of anthocyanin colouration while that of ‘Snowden' has an absent or very weak intensity of anthocyanin colouration. The plants of ‘Petoskey' have an upright growth habit while those of ‘Snowden' have a semi-upright growth habit. The stem of ‘Petoskey' has a low extent of anthocyanin colouration while that of ‘Snowden' has an absent or very low extent of anthocyanin colouration. The plants of ‘Petoskey' have many medium to large inflorescences while those of ‘Snowden' have very few to few very small inflorescences. The inner side of the corolla of ‘Petoskey' has a high extent of medium intensity anthocyanin colouration while that of ‘Snowden' has an absent or very low extent of absent or very weak intensity anthocyanin colouration. The plants of ‘Petoskey' are shorter than those of ‘Snowden'.

Description:

LIGHTSPROUT: small to medium size, medium to many root tips, very short to short lateral shoots
LIGHTSPROUT BASE: ovoid, medium intensity of anthocyanin colouration, low proportion of blue in anthocyanin colouration, medium density of pubescence
LIGHTSPROUT APEX: medium size in relation to base, closed habit, absent or very weak intensity of anthocyanin colouration, medium density of pubescence

PLANT: foliage structure is intermediate type where foliage is half open and stems are partly visible, upright growth habit, many inflorescences, matures late in the season

STEM: low extent of anthocyanin colouration

LEAF: medium size, touching to free arrangement of leaflets, medium number of secondary leaflets, light to medium green upper side, weak intensity of anthocyanin colouration on upper side of midrib
SECOND PAIR OF LATERAL LEAFLETS: narrow in relation to length
TERMINAL AND LATERAL LEAFLETS: absent or very low frequency of coalescence

INFLORESCENCE: medium to large
PEDUNCLE: low extent of anthocyanin colouration
FLOWER BUD: weak intensity of anthocyanin colouration
COROLLA: medium size diameter
COROLLA (INNER SIDE): high extent of anthocyanin colouration, medium intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration

TUBER: round, white flesh
TUBER EYE: shallow, yellow at base
TUBER SKIN: light yellow brown, medium texture

Origin & Breeding History: ‘Petoskey' (experimental designation MSV030-4) originated from the cross between the varieties ‘Beacon Chipper', as the female parent and ‘MSG227-2', as the male parent, conducted at the Michigan State University breeding station in East Lansing, Michigam, USA in 2007. The new variety was designated MSV030-4 in 2009 based on negative mass selection for agronomic characteristics including tuber shape, tuber skin colour, chipping quality as well as disease resistances.

Tests & Trials: : The comparative trial for ‘Petoskey' was conducted by Global Agri Services Inc. in Central Blissville, New Brunswick during the 2025 growing season. The field trial consisted of a single 16-metre-long row for each variety, with rows spaced 1.1 metres apart. Each row contained 70 plants spaced 0.23 metres apart. Measurements were taken from 10 plants, or 10 parts of plants, of each variety. The mean differences were significant at the 5% confidence probability level based on a paired Student's t-test. 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.

Comparison table for 'Petoskey' with reference variety 'Snowden'

Plant height (cm)

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Potato: ‘Petoskey' (left) with reference variety ‘Snowden' (right)