Yambu

Strawberry

Variety Description

Variety used for comparison: 'Clery'

Summary: The leaf of 'Yambu' has a medium degree of blistering whereas the leaf of 'Clery' has absent or weak blistering. The leaf of 'Yambu' has strong glossiness whereas that of 'Clery' has a medium degree of glossiness. The shape of the base of the terminal leaflet for 'Yambu' is obtuse whereas that of 'Clery' is acute. 'Yambu' has a shorter petiole than that of 'Clery'. The flower diameter of 'Yambu' is smaller than that of 'Clery'. The fruit of 'Yambu' is moderately shorter than wide whereas the fruit of 'Clery' is moderately longer than wide. The fruit of 'Yambu' is reniform shaped whereas the fruit of 'Clery' is conical shaped. The calyx attachment of 'Yambu' is level with the fruit whereas that of 'Clery' is raised. The sepals of 'Yambu' have an outwards attitude whereas those of 'Clery' have an upwards attitude. The fruit of 'Yambu' is soft to medium in firmness with a light pink flesh colour whereas that of 'Clery' is medium to firm with a whitish flesh colour.

Description:

PLANT: not remontant bearing type, semi-upright growth habit, medium to strong vigour

STOLONS: medium number, weak intensity of anthocyanin colouration, medium pubescence

LEAF: medium size, medium green on upper side, medium degree of blistering, strong glossiness, no variegation
TERMINAL LEAFLET: length equal to width, obtuse base, serrate to crenate margin, concave in cross-section
PETIOLE: medium length, slightly outwards attitude of hairs
STIPULE: absent or very weak to weak intensity of anthocyanin colouration

FLOWERING: begins very early to early
INFLORESCENCE: positioned above foliage, medium number of flowers
PEDICEL: upwards attitude of hairs
FLOWER: calyx same size as corolla, overlapping petal arrangement, stamens present
PETAL: length equal to width, white inner side

CALYX: attachment level with fruit, outwards attitude of sepals, diameter slightly smaller than fruit, medium adherence to fruit
FRUIT: begins ripening very early to early, moderately shorter than wide, medium to large size, reniform shape, moderate difference in shape between terminal fruit and other fruit, medium width of band without achenes
FRUIT SURFACE: medium red, strong glossiness, even or very slightly uneven colour, even or very slightly uneven surface, achenes positioned below fruit surface
FRUIT FLESH: soft to medium firmness, light pink, white core, medium size cavity

Origin & Breeding History: 'Yambu' originated from a cross conducted in 2001 in Wageningen, Netherlands. The cross was made between the female parent variety 'E1991-023' and the male parent variety 'Honeoye'. In 2003, the new variety was selected based on plant maturity, fruit shape and appearance, yield, and fruit adherence for picking in Elst, Gelderland, Netherlands. 'Yambu' was propagated by runner cuttings in autumn of 2003 in Elst, Gelderland, Netherlands.

Tests & Trials: The comparative trial for 'Yambu' was conducted during the summer of 2021 in Granby, Quebec. A total of 720 bareroot plants per variety were planted in 3 replicates of double row raised beds covered with black plastic, in late fall of 2020. The raised beds were approximately 30 metres in length, spaced 1.5 metres apart with 25 cm between the plants. Measured characteristics were taken from 20 plants, or parts of 20 plants. Mean differences were significant at the 5% probability level based on a paired Student's t-test.

Comparison tables for 'Yambu' with reference variety 'Clery'

Petiole length (cm)

Flower diameter (cm)

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Strawberry: 'Yambu' (left) with reference variety 'Clery' (right)

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Strawberry: 'Yambu' (left) with reference variety 'Clery' (right)

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Strawberry: 'Yambu' (left) with reference variety 'Clery' (right)