Language selection


Joan J


Denomination: 'Joan J'
Botanical Name: Rubus
Applicant/Holder: Jennings, Derek L.
Clifton, Honey Lane, Otham
Kent County
United Kingdom
Breeder: Derek L. Jennings, Maidstone, United Kingdom
Agent in Canada: Smart & Biggar LLP
P.O. Box 2999, Station D
900-55 Metcalfe Street
Ottawa, Ontario
K1P 5Y6
Tel: 613-232-2486
Application Date: 2006-06-13
Application Number: 06-5505
Grant of Rights Date: 2010-06-03
Certificate Number: 3881
Date rights revoked: 2012-10-16

Variety Description

Variety used for comparison: 'Joan Squire'

Summary: Bloom on the current season's cane of 'Joan J' is medium whereas it is absent on 'Joan Squire'. The current season's canes of 'Joan J' are shorter than those of 'Joan Squire'. The leaves of 'Joan J' have equally three and five leaflets per leaf whereas 'Joan Squire' has predominantly five leaflets per leaf. The fruit of 'Joan J' is short to medium in length whereas the fruit of 'Joan Squire' is medium to long. The fruit of 'Joan J' is broad conical in lateral view whereas the fruit of 'Joan Squire' is medium conical.


PLANT: medium number of current season's canes, fruit bearing both on current season's cane in summer and on current season's cane in autumn
VERY YOUNG SHOOT: no anthocyanin colouration at apex during rapid growth

CANE: mid-season emergence, medium bloom, absent or very weak anthocyanin colouration, short internode, short vegetative bud
SPINES: absent

LEAF: medium green, equally three and five leaflets per leaf, straight to convex profile in cross-section, weak rugosity, overlapping lateral leaflets

FLOWERING: mid-season
PEDICEL: absent or very few spines
PEDUNCLE: no anthocyanin colouration
FLOWER: medium size

FRUIT RIPENING: mid-season
FRUIT: short to medium length, medium in width, medium length/width ratio, broad conical in lateral view, medium size single drupe, medium red, weak glossiness, medium firmness, medium adherence to plug

Origin & Breeding History: 'Joan J' resulted from crossing 'Joan Squire' (female parent) with 'Terri-Louise' (male parent) which was made in 1993 at Medway Fruits in Maidstone, Kent, United Kingdom. 'Joan J' was first selected in 1995. Selection criteria were earliness of fruiting, fruit size and flavour, fruit productivity and plant growth habit. 'Joan J' was reproduced using vegetative propagation.

Tests & Trials: The tests and trials for 'Joan J' were planted in the spring of 2008 in 21 cm diameter pots filled with a commercial soil-less potting mix and raised in a greenhouse. There were 15 pots spaced 30 cm apart for each variety in the row and spaced one meter apart between rows. Data was collected during the 2008 and 2009 growing seasons.

Comparison table for 'Joan J' with reference variety 'Joan Squire'

Current season's cane length (cm)

  'Joan J' 'Joan Squire'
mean 107.00 128.00
std. deviation 12.78 17.79

Click on image for larger view
Joan J
Raspberry: 'Joan J' (left) with reference variety 'Joan Squire' (right)

Click on image for larger view
Joan J
Raspberry: 'Joan J' (left) with reference variety 'Joan Squire' (right)

Date modified: