Joan Irene
| 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 LLP 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
Raspberry: 'Joan Irene' (left) with reference variety 'Joan J.' (right)
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