Red Bull

Lettuce

Denomination: 'Red Bull'
Previously Proposed Denomination: 'PS06515636'
Botanical Name: Lactuca sativa
Applicant/Holder: Seminis Vegetable Seeds, Inc.
800 North Lindbergh Blvd.
St. Louis, Missouri
63167
United States of America
Breeder: Alexandria Quesada, Seminis Vegetable Seeds, Inc., St. Louis, United States of America
Agent in Canada: Seminis Vegetable Seeds, Inc.
613 Tomahawk Cresent
Ancaster, Ontario
L9G 3T4
Canada
Tel: 905-304-1795
Application Date: 2004-12-17
Application Number: 05-4623
Grant of Rights Date: 2010-02-25
Certificate Number: 3806
Date rights revoked: 2012-07-09

Variety Description

Variety used for comparison: 'Red Tide'

Summary: The leaves of 'Red Bull' are obovate in shape whereas they are elliptic to broad elliptic in 'Red Tide'. 'Red Bull' has strong glossiness and blistering on the upper side of the leaves whereas it is medium on the leaves of 'Red Tide'. The plants of 'Red Bull' are narrower than those of 'Red Tide'.

Description:

SEEDLING: very weak anthocyanin colouration
COTYLEDONS: small to medium size, elliptic shape

PLANT: leaf type
OUTER LEAVES: reddish, medium intensity of colour
LEAF: medium thickness, obovate shape, medium to strong anthocyanin colouration diffused on the upper third of the blade, strong glossiness, concave profile
ATTITUDE: semi-erect at 10-12 leaf stage and at harvest maturity
BLISTERING: strong, medium size blisters
LEAF BLADE: entire, medium to strong undulation of margins, not flabellate (fan-shaped) venation
MARGINS INCISIONS AT APEX: shallow, sparse

SEED: white

Origin & Breeding History: 'Red Bull' was derived from crossing 'PI171676A' with 'SVR920528' in 1996 at the Seminis Vegetable Seed Research Station in Arroyo Grande, California, USA. Pedigree selection breeding method was used, using both single plant selection and mass selection practices. Selection criteria for 'Red Bull' included uniformity and improved heading ability, increased plant weight and leaf count and resistance to premature stem elongation (bolting).

Tests & Trials: The tests and trials for 'Red Bull' were conducted at Bank Gardens, Lynden, Ontario and Princeton, Ontario during the summers of 2007 and 2008. The trials consisted of a minimum of 105 plants, across a minimum of 3 replicates. Plants were spaced at 15 and 25 centimetre spacings, with a row spacing of 75 centimetres. Measured characteristics were based on 10 measurements.


Comparison tables for 'Red Bull' with reference variety 'Red Tide'

Plant diameter (cm)

  'Red Bull' 'Red Tide'
mean 28.4 35.3
std. deviation 2.1 2.5

Days to beginning of bolting under long day conditions

  'Red Bull' 'Red Tide'
number of days 53 54

Days to harvest maturity

  'Red Bull' 'Red Tide'
number of days 45 45

Click on image for larger view
Red Bull
Lettuce: 'Red Bull' (left) with reference variety 'Red Tide' (right)

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