Rainier Russet

Potato

Variety Description

Variety used for comparison: 'Teton Russet'

Summary: The base of the lightsprout of 'Rainier Russet' has a weak to medium intensity of anthocyanin colouration with a medium proportion of blue while that of 'Teton Russet' has a very strong intensity of anthocyanin colouration with a high proportion of blue. The base of the lightsprout of 'Rainier Russet' has dense pubescence while that of 'Teton Russet' has a medium density of pubescence. The lightsprout of 'Rainier Russet' has many root tips while that of 'Teton Russet' has a medium number of root tips. The plants of 'Rainier Russet' have a semi-upright growth habit while the plants of 'Teton Russet' have an upright growth habit. The stem of 'Rainier Russet' has a medium extent of anthocyanin colouration halfway up the stem while the stem of 'Teton Russet' has a high extent of anthocyanin colouration along the entire stem. The plants of 'Rainier Russet' are taller than those of 'Teton Russet'. The plants of 'Rainier Russet' have a very high frequency of flowers while those of 'Teton Russet' have a low frequency of flowers.

Description:

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

PLANT: foliage structure is leaf type where foliage is closed and stems are not or hardly visible, semi-upright growth habit, very high frequency of flowers, matures late in the season

STEM: medium extent of anthocyanin colouration halfway up the stem

LEAF: medium sized outline, open openness, weak presence of secondary leaflets, light to medium green upper side, absent or very low extent of absent or very weak intensity 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 size, leaflet is narrower than long
LEAFLET: absent or very weak to weak waviness of margin, shallow veins, dull to medium glossiness on upper side, pubescence absent on blade at apical rosette

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

TUBER: long oval to long, white flesh
TUBER EYE: shallow to medium depth, yellow at base
TUBER SKIN: reddish brown

Origin & Breeding History: 'Rainier Russet' (experimental designation AO06191-1) originated from the cross between A99134-1 as the female parent and 'Canela Russet' as the male parent, conducted at the University of Idaho Research and Extension Center and USDA/ARS breeding Program in Aberdeen, Idaho, USA. One of the resulting progeny was selected and designated AO06191-1 in 2009 based on tuber shape and uniformity, internal quality, yield, disease resistance and processing quality.

Tests & Trials: The comparative trial for 'Rainier Russet' was conducted by Global Agri Services Inc. in Central Blissville, New Brunswick during the 2023 growing season. The field trial consisted of a single 15.2 metre long row per variety. Rows were spaced 1.1 metres apart with each row containing 65 plants spaced 0.23 metres apart. Measurements were taken from 10 plants, or 10 parts of plants, of each variety. The mean difference was significant at the 5% 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 'Rainier Russet' with reference variety 'Teton Russet'

Plant height (cm)

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Potato: 'Rainier Russet' (left) with reference variety 'Teton Russet' (right)

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Potato: 'Rainier Russet'

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Potato: 'Rainier Russet' (left) with reference variety 'Teton Russet' (right)