Joan J
| Denomination: | 'Joan J' |
|---|---|
| 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 900-55 Metcalfe Street Ottawa, Ontario K1P 5Y6 Canada 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.
Description:
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
Raspberry: 'Joan J' (left) with reference variety 'Joan Squire' (right)
Click on image for larger view
Raspberry: 'Joan J' (left) with reference variety 'Joan Squire' (right)
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