KAS22

Apple

Variety Description

Varieties used for comparison: 'Novaspy' and 'Liberty'

Summary: The tree of 'KAS22' has an upright growth habit whereas 'Novaspy' has a weeping growth habit and 'Liberty' has a spreading one. The length/width ratio of the leaf of 'KAS22' is large whereas it is medium on both reference varieties. The fruit diameter of 'KAS22' is larger than that of both reference varieties. The overcolour of skin on the fruit of 'KAS22' is a solid red flush with weakly defined stripes whereas it is orange red with stripes only on 'Novaspy' and is a purple red weakly defined flush with strongly defined stripes on 'Liberty'.

Description:

TREE: strong vigour, ramified, upright growth habit, bearing on spurs and long shoots
ONE-YEAR OLD SHOOT: medium thickness, short internodes, light brown on sunny side, dense pubescence on distal half of shoot, medium number of lenticels

LEAF: upwards attitude in relation to shoot, large length/width ratio, medium green, serrate type 2 margin on upper half, absent or very weak pubescence on lower side
PETIOLE: small extent of anthocyanin colouration at base

FLOWER: predominantly dark pink at balloon stage, overlapping arrangement of petals, stigma positioned above anthers, begins flowering mid-season

YOUNG FRUIT: large extent of anthocyanin overcolour
FRUIT: medium size, medium height/diameter ratio, obloid shape, moderate ribbing, moderate crowning at calyx end, medium-sized eye, medium length sepals, mid-season harvest maturity and early eating maturity
FRUIT SKIN: moderate glaucosity, absent or weak greasiness, yellow ground colour, large area of russet around stalk attachment, absent or small area of russet on cheeks and around eye basin, medium number of medium sized lenticels
OVERCOLOUR: relatively large, medium red, pattern solid flush with weakly defined broad stripes
STALK: medium length and thickness
STALK CAVITY: medium depth and broad
EYE BASIN: medium depth and width
FRUIT FLESH: firm, yellowish, moderately open aperture of locules in transverse section

FRUIT QUALITY: strong browning of the flesh one hour after being cut, medium percentage of malic acid and total sugars in the juice

DISEASE REACTION: moderately resistant to apple scab (Venturia inaequalis)

Origin & Breeding History: 'KAS22' arose from the cross 'S28-18-36' as the female parent with 'Stark Splendor' as the male parent which was conducted in 1975 at the Agriculture & Agri-Food Research Station in Kentville, Nova Scotia. Seedlings of the initial cross were grafted on the semi-dwarf rootstock MM.106 and were planted in a replicated trial in 1979. The selection criteria included fruit size, firmness, flavour, texture, storage adaptability, flavour and texture retention following storage and resistance to disease and insects.

Tests & Trials: Tests and trials were conducted in 2008 and 2009 at the Agriculture & Agri-Food Horticulture Research Center in Kentville, Nova Scotia. The original planting consisted of 5 trees of 'KAS22', 12 trees of 'Novaspy' and 9 trees of 'Liberty'. The trial was planted in 1998 in a RCB design, with trees spaced 3.5 meters apart within the row and rows spaced 5.0 meters apart.

Comparison tables for 'KAS22' with reference varieties 'Novaspy' and 'Liberty'

Leaf length (cm)

Leaf width (cm)

Flower diameter (when petals pressed in horizontal position) (cm)

Fruit diameter (cm)

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Apple: 'KAS22' (left) with reference varieties 'Novaspy' (centre) and 'Liberty' (right)

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Apple: 'KAS22' (left) with reference varieties 'Novaspy' (centre) and 'Liberty' (right)