Denomination: 'Reaper'
Previously Proposed Denomination: 'RE3040-02.4'
Botanical Name: Brassica napus
Applicant/Holder: Norddeutsche Pflanzenzücht
Hans-Georg Lembke KG
Hohenlieth, D-24363
Breeder: Dietmar Brauer, Norddeutsche Pflanzenzücht, Holtsee, Germany
Agent in Canada: DL Seeds Inc.
P.O. Box 2499
25028 Road 17N
Morden, Manitoba
R6M 1C2
Tel: 204-331-3611
Application Date: 2005-05-09
Application Number: 05-4889
Grant of Rights Date: 2008-01-09
Certificate Number: 3109
Date rights surrendered: 2009-06-01

Variety Description

Varieties used for comparison: 'DS Roughrider' and 'Minot'

Summary: 'Reaper' has shallower indentations of the leaf margin than 'DS-Roughrider' and 'Minot'. The leaf of 'Reaper' is longer than 'Minot'. 'Reaper' flowers later than 'DS-Roughrider' and 'Minot'. The silique of 'Reaper' is shorter than 'DS-Roughrider' and 'Minot'. 'Reaper' has a longer beak than 'Minot'. The pedicel of 'Reaper' is longer than in DS-Roughrider'.


'Reaper' is a spring canola variety. The cotyledons are medium in width and medium in length. Leaf blades are medium green in colour with a few number of lobes present. The leaf margin is rounded to sharp with dentations that are shallow to medium in depth. The leaves are short to medium in length and narrow in width. 'Reaper' has yellow flower petals. The siliques are very short in length, with a short beak length and short to medium pedicel length. The plants are tall in height at maturity. Seed colour is black . 'Reaper' has low erucic acid content and low glucosinolates. 'Reaper' is resistant to glyphosate herbicides.

Origin & Breeding History: 'Reaper' is a glyphosate tolerant spring canola variety. The initial cross took place in 1996 in Hohenlieth, Germany between DS-Roughrider x 46A65. The F1 was selfed in the greenhouse in 1996/1997. In 1997 the F2 was screened in the field in Morden, Manitoba beginning with a pedigree selection scheme with recurrent selection. The F3, F4 and F5 generations were screened and selected for glyphosate tolerance, agronomy and quality characteristics in Morden, Manitoba. At the F5, single plants were selected and selfed in 2000. In 2001 and 2002 they were in a replicated yield and spray trials in Western Canada and were selected for yield, blackleg tolerance, herbicide tolerance and agronomic and quality characteristics. In 2002 there was greenhouse multiplication from the selfed F5 plants. The line was entered into private Coop Trials in Western Canada in 2003. Breeder seed multiplication began in 2003. The line was tested in the WCC/RRC Coop trials in 2004 and was supported for variety registration that same year.

Tests & Trials: Tests and trials were conducted at the Elora Research Station, Elora, Ontario in the summers of 2004 and 2005. Plots consisted of 4 rows that were 7 metres in length and had a row spacing of 40 cm. There were 2 replications arranged in RCB design.

Comparison tables for 'Reaper' with reference varieties 'DS Roughrider' and 'Minot'

Means are based on a two year average of 60 plant parts for silique, beak and pedicel characteristics and 30 for leaf characteristic measurements. Differences are significant at the 2% probability level based on LSD values.

Leaf length (cm)

  'Reaper' 'DS Roughrider' 'Minot'
mean 24.20 23.88 20.59
std. deviation (LSD= 1.713) 3.96 4.64 3.33

Days to flowering

  'Reaper' 'DS Roughrider' 'Minot'
mean 54.75 51.25 50.75

Silique length (mm)

  'Reaper' 'DS Roughrider' 'Minot'
mean 52.12 63.31 60.45
std. deviation (LSD= 2.0128) 4.39 5.50 4.82

Beak length (mm)

  'Reaper' 'DS Roughrider' 'Minot'
mean 9.05 8.63 8.10
std. deviation (LSD= 0.7912) 2.35 1.83 2.52

Pedicel length (mm)

  'Reaper' 'DS Roughrider' 'Minot'
mean 21.14 16.50 20.09
std. deviation (LSD= 1.7140) 7.09 4.55 3.97
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