MINNB42

Apple

Variety Description

Variety used for comparison: 'Honeycrisp'

Summary: The extent of anthocyanin colouration on the young fruit of 'MINNB42' is small whereas it is absent or very small on the young fruit of 'Honeycrisp'. The relative area of over colour on the fruit of 'MINNB42' is medium to large whereas the relative area for 'Honeycrisp' is small to medium sized. The intensity of the over colour on the fruit of 'MINNB42' is medium to strong whereas for 'Honeycrisp' it is of weak to medium intensity. The over colour on the fruit of 'MINNB42' is a solid flush with weakly defined stripes whereas the over colour for 'Honeycrisp' is a weakly defined flush with strongly defined stripes.

Description:

TREE: weak vigour, ramified, spreading growth habit, fruit bearing on spurs and long shoots, begins flowering mid-season, mid-season to late fruit harvest and eating maturity

ONE-YEAR-OLD SHOOT: medium to thick, medium brown on side facing sun, sparse to medium density of pubescence on distal half, medium number of lenticels

PETIOLE: medium extent of anthocyanin colouration from base
LEAF BLADE: upwards attitude in relation to shoot, medium length to width ratio, strong intensity of green on upper side, biserrate incisions of margin on distal half, medium density of pubescence on lower side

FLOWER: predominantly light pink at balloon stage, intermediate arrangement of petals, stigmas positioned above anthers

YOUNG FRUIT: small extent of anthocyanin over colour
FRUIT: medium to large, medium height to diameter ratio, conic and globose shape, absent or weak degree of ribbing, absent or weak crowning at calyx end, medium length sepal
FRUIT SKIN: absent or weak degree of bloom, absent or weak degree of greasiness, yellow green ground colour, medium to large relative area of over colour, medium to strong intensity of red over colour, over colour distributed as solid flush with weakly defined stripes, narrow to medium width stripes, absent or small area of russet around stalk attachment, absent to small area of russet on cheeks, absent or small area of russet around eye basin, many medium to large lenticels
FRUIT STALK: medium thickness
FRUIT STALK CAVITY: medium depth, medium width
FRUIT EYE: small to medium sized
FRUIT EYE BASIN: medium depth, narrow
FRUIT FLESH: medium degree of firmness, cream coloured, closed or slightly open aperture of locules in transverse section

Origin & Breeding History: 'MINNB42' originated as a naturally occurring branch mutation of the variety 'Honeycrisp'. The new variety was discovered by the breeders, David Bedford and James Luby, in Excelsior, Minnesota, USA in 1999. Selection of 'MINNB42' was based on the extent and intensity of the red over colour, resistance to disease, time of harvest maturity, fruit shape, number of lenticels, acidity and storage life.

Tests & Trials: The comparative trial for 'MINNB42' was conducted from 2020 to 2021 at Summerland Varieties Corp. test plots, in Summerland, British Columbia. The trial consisted of 10 trees of 'MINNB42' planted in 2017 on M9 rootstock and 10 trees of 'Honeycrisp' planted in 2012 on M9-Nic29 rootstock. An adjacent field of more than 20 trees of 'MINNB42' was also used for assessment. Trees were planted approximately 0.61 metres apart within a row and the rows were 3 metres apart. Observations and measurements were taken on 10 trees or 10 parts of trees for all varieties.

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Apple: 'MINNB42' (top) with reference variety 'Honeycrisp' (bottom)