Madrid

Potato

Variety Description

Variety used for comparison: 'Montreal'

Summary: The lightsprout of ‘Madrid' is small to medium in size while that of ‘Montreal' is large. The base of the lightsprout of ‘Madrid' is globose in shape and has a medium intensity of anthocyanin colouration while that of ‘Montreal' is broad cylindrical and has a strong intensity of anthocyanin colouration. The apex of the lightsprout of ‘Madrid' has a closed habit, a very weak to weak intensity of anthocyanin colouration, and absent or very sparse pubescence while that of ‘Montreal' has an intermediate habit, a medium intensity of anthocyanin colouration, and medium to dense pubescence. The lightsprout of ‘Madrid' has very few root tips while that of ‘Montreal' has few root tips. The leaf of ‘Madrid' is large to very large while that of ‘Montreal' is medium sized. The flower bud of ‘Madrid' has an absent or very weak intensity of anthocyanin colouration while that of ‘Montreal' has a weak intensity of anthocyanin colouration. The plants of ‘Madrid' are taller than those of ‘Montreal'. The plants of ‘Madrid' have a late to very late time of maturity while those of ‘Montreal' have an early to mid-season time of maturity. The tuber flesh of ‘Madrid' is light yellow while that of ‘Montreal' is yellowish white.

Description:

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

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

STEM: low extent of anthocyanin colouration

LEAF: large to very large, touching to free arrangement of leaflets, medium number of secondary leaflets, medium green upper side, very weak to weak 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 width in relation to length

PEDUNCLE: absent or very low extent of anthocyanin colouration
INFLORESCENCE: medium size
FLOWER BUD: absent or very weak intensity of anthocyanin colouration
COROLLA: medium to large diameter
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: short-oval, light yellow flesh
TUBER EYE: shallow to medium depth, yellow at base
TUBER SKIN: yellow, smooth texture

Origin & Breeding History: 'Madrid' (experimental designation KM 05-82-73) originated from the cross between ‘Fabula' as the female parent and 'Bellini' as the male parent, conducted at the J.M. Kannegieter breeding station in Emmeloord, Netherlands in 2004. One of the resulting progeny was selected and designated KM 05-82-73 in 2006 based on negative mass selection including tuber size, tuber number, tuber skin texture, yield potential and disease resistance.

Tests & Trials: The comparative trial for 'Madrid' was conducted by Global Agri Services Inc. in Central Blissville, New Brunswick during the 2024 growing season. The field trial consisted of a single 14.86 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 'Madrid' with reference variety 'Montreal'

Plant height (cm)

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Potato: ‘Madrid' (left) with reference variety ‘Montreal' (right)