SJP84-5230

Apple

Variety Description

Varieties used for comparison: 'M.9' and 'M.26'

Summary: One-year-old shoots of the apple rootstock variety 'SJP84-5230' have less pubescence on the upper half than the reference varieties, less shiny bark and shorter internodes than 'M.9'. 'SJP84-5230' has smaller leaves than the reference varieties. Leaves of 'SJP84-5230' have less pubescence and are lighter green than those of 'M.26'. The fruit of 'SJP84-5230' is smaller than that of 'M.26'. The fruit of 'SJP84-5230' is ellipsoid in shape and has no eye basin, whereas that of 'M.26' is flat and has a broad and moderately deep eye basin.

Description:

TREE: end use as clonal rootstock, weak to intermediate vigour, few basal shoots, mainly wavy growth of basal shoot, absent or very low tendency to produce suckers, poor root anchorage, extreme dwarfing effect

DORMANT ONE-YEAR OLD SHOOT: weak pubescence on upper half, weak shine of bark, weak to strong flexibility, moderate number of mid-size lenticels, predominantly reddish brown on sunny side
LATERAL BUD: small, pointed tip, adpressed to slightly held out position relative to axis of shoot, small to medium support
GROWING TIP: red

SHOOT TIP LEAVES: concave in cross section, absent or very weak pubescence on upper side, yellowish-green on lower side, no secondary colour
LEAF: no lobes, small, oriented upwards, length/width ratio of 1.6, cuspidate apex, serrate margin, weak glossiness on upper side, sparse pubescence on lower side, weak anthocyanin colouration of veins, light green to medium green on upper side, absent or very weak anthocyanin colouration on upper side, stipule medium to large

FLOWER BUD: purple (RHS 58A), light pink to medium pink at full balloon stage
FLOWER: single type, green pedicel
PETAL: ovate to oblong, touching to overlapping margins, purple (RHS 58A) on upper side and lower side

FRUIT: very small, ellipsoid in shape, symmetric or asymmetric in side view, moderate ribbing, moderate outward crowning at distal end, small to medium closed eye, persistent calyx in mature fruit, moderate to long sepals overlapping at base, no eye basin, thin and very long stalk, narrow and shallow stalk cavity
FRUIT SURFACE: no bloom, no waxiness of skin, green-yellow ground colour, moderate amount (40-60%) of red to orange over colour, solid and washed out over colour, no russet, slightly prominent small lenticels
FRUIT IN CROSS-SECTION: yellowish flesh, moderate core line, closed locules

SEED: brown, globose-conical in shape

Origin & Breeding History: 'SJP84-5230' originated from a cross between 'Robusta 5' and variety 'M.27' ('M.13' × 'M.9') performed in 1975 at the Rootstock Breeding Program of Agriculture and Agri-Food Canada in St-Jean-sur-Richelieu, Quebec. It has been undergoing evaluations since 1984 in several locations in Quebec (Frelighsburg, Mont-St-Grégoire, L'Acadie and Dunham). 'SJP84-5230' was planted in 1997 in replicated trials at the Agriculture and Agri-Food Canada substation of Frelighsburg, at the Agriculture and Agri-Food Canada substation of L'Acadie, and at two grower sites for evaluating its performance as a rootstock for McIntosh Summerland scions.

Tests & Trials: Trials for variety 'SJP84-5230' were conducted at the Agriculture and Agri-Food Canada substations of Frelighsburg and L'Acadie, Quebec Trees were planted in a randomized block design, with four replicates in 3 metre rows with trees 40 cm apart. All colour characteristics were determined using the 2001 Royal Horticultural Society (RHS) colour chart and measured characteristics were based on ten measurements.

Comparison tables for 'SJP84-5230' with reference varieties 'M.9' and 'M.26'

Length of internode (cm)

Width of leaf (cm)

Click on image for larger view

Apple: 'SJP84-5230' (top) with reference varieties 'M.9' (centre) and 'M.26' (bottom)