Joan Irene

Raspberry

Denomination: 'Joan Irene'
Botanical Name: Rubus
Applicant/Holder: Jennings, Derek L.
Clifton, Honey Lane, Otham
Kent County
Maidstone
ME15 SRJ
United Kingdom
Breeder: Derek L. Jennings, Maidstone, United Kingdom
Agent in Canada: Smart & Biggar
P.O. Box 2999, Station D
55 Metcalfe Street, Suite 900
Ottawa, Ontario
K1P 5Y6
Canada
Tel: 613-232-2486 ex. 1279
Application Date: 2007-07-13
Application Number: 07-5969
Grant of Rights Date: 2008-11-01
Certificate Number: 3385
Date rights revoked: 2013-04-09

Variety Description

Variety used for comparison: 'Joan J'

Summary: 'Joan Irene' differs from 'Joan J' mainly in cane length, number of leaflets, relative position of lateral leaflets, length and width of lateral leaflets, time of fruit ripening and fruit size. 'Joan Irene' has a longer current season's cane than 'Joan J'. 'Joan Irene' has predominantly three leaflets per leaf while 'Joan J' has five. The relative position of the lateral leaflets is free for Joan Irene' while it is overlapping for 'Joan J'. 'Joan Irene' has a longer and wider terminal leaflet than 'Joan J'. The fruit begins to ripen later for 'Joan Irene' than for 'Joan J'. 'Joan Irene' has longer and wider fruit than 'Joan J'.

Description:

PLANT: fruit bearing only on current year's cane in autumn
VERY YOUNG SHOOT: no anthocyanin colouration at apex

CANE: medium glaucosity, absent or very weak anthocyanin colouration, medium length of internode, short vegetative bud
SPINES: absent

LEAF: medium green
LEAFLET: usually three per leaf, convex profile of cross section, very weak rugosity between the veins, free relative position

FLOWERING: early to mid season
PEDICEL: absent or very few spines
PEDUNCLE: absent anthocyanin colouration
FLOWER: large

FRUIT RIPENING: beginning mid to late in the season
FRUIT: medium to long, medium to broad, length/width ratio is longer than broad, broad conical shape in lateral view, small to medium sized drupe, medium red, weak to medium glossiness, medium firmness, medium adherence to plug
FRUITING PERIOD: moderate duration

Origin & Breeding History: 'Joan Irene' originated from crossing 'Joan J' and an unnamed variety using traditional breeding methods. The initial cross was made in 1996. The selection criteria used were high fruit quality and productivity. The crosses were conducted at Medway Fruits in Maidstone, Kent, United Kingdom and the variety was reproduced by root cuttings and spawn bed productions.

Tests & Trials: Plants were planted in the spring of 2006 in 21 cm diameter pots filled with a commercial soil-less potting mix and raised in a greenhouse. There were 25 pots spaced 30 cm apart for each variety. Plants were potted up and moved to the greenhouse in the spring of 2006 and examined in the fall of 2007. Plants were maintained at a minimum of twenty degrees Celsius throughout. No chilling periods were given in the winter of 2006-2007.


Comparison tables for 'Joan Irene' with reference variety 'Joan J'

Current season's cane length (cm)

  'Joan Irene' 'Joan J'
mean 291 200
std. deviation 24.1 18.42

Terminal leaflet length (cm)

  'Joan Irene' 'Joan J'
mean 14.4 13.7
std. deviation 1.29 1.23

Terminal leaflet width (cm)

  'Joan Irene' 'Joan J'
mean 9.9 8.3
std. deviation 1.28 1.22

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

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