Denomination: '9550'
Previously Proposed Denomination: 'PR6336'
Botanical Name: Brassica napus
Applicant/Holder: Monsanto Canada Inc.
900 One Research Road
Winnipeg, Manitoba
R3T 6E3
Breeder: Zenon Lisieczko, Monsanto Canada Inc., Guelph, Ontario
Application Date: 2004-10-26
Application Number: 04-4510
Grant of Rights Date: 2008-09-18
Certificate Number: 3351
Date rights surrendered: 2009-10-26

Variety Description

Varieties used for comparison: 'DKL34-55' and 'PR3180'

Summary: '9550' has a wider cotyledon than the reference varieties. The leaf of '9550' is slightly longer than in the reference varieties. '9550' has a shorter silique than 'PR3180'. The plant maturity of '9550' is earlier than that of 'DKL34-55'. '9550' has a taller plant height than 'PR3180'.


PLANT: medium cotyledon width, very short to short height

LEAF: dark green, few to medium lobes present, sharp margin, medium depth dentations of the margin, short, very narrow to narrow

FLOWER: yellow

POD: short silique, very short to short beak, short pedicel
SEED: black

AGRONOMY: fair to good lodging resistance
QUALITY: trace erucic acid levels, very low glucosinolates

CHEMICAL REACTION: resistant to glyphosate herbicides

Origin & Breeding History: 'PR6336' was developed by the breeder, Zenon Lisieczko of Monsanto Canada Inc., in Listowel, Ontario in 1996. The segregating generations were selected for oil content, standability, yield and resistance to glyphosate herbicides. At the F5 generation, one plant was selected from which 'PR6336' originated. This variety has subsequently been called '9550'.

Tests & Trials: Tests and trials for '9550' were conducted during the summers of 2005 and 2006 at the Elora Research Station, Elora, Ontario. Plots consisted of 4 rows which were 5 meters in length and a row spacing of 35 cm. There were 2 replicates arranged in a Random Complete Block Design.

Comparison tables for '9550' with reference varieties 'DKL34-55' and 'PR3180'

Means are based on a two year average of 40 plant parts for cotyledon measurements, 30 for leaf and 60 for silique characteristics. Differences are significant at the 2% probability level based on LSD values.

Cotyledon width (mm)

  '9550' 'DKL34-55' 'PR3180'
mean 25.29 22.25 19.56
std. deviation (LSD=1.0573) 3.01 2.39 3.34

Leaf length (cm)

  '9550' 'DKL34-55' 'PR3180'
mean 20.22 17.88 16.79
std. deviation (LSD=1.1599) 2.32 2.78 3.21

Silique length (mm)

  '9550' 'DKL34-55' 'PR3180'
mean 58.17 57.10 66.60
std. deviation (LSD=3.1994) 10.11 9.64 11.87

Days to maturity

  '9550' 'DKL34-55' 'PR3180'
mean 92 95 96

Plant height at maturity (cm)

  '9550' 'DKL34-55' 'PR3180'
mean 85.97 81.85 74.07
std. deviation (LSD=3.4508) 6.06 8.41 9.98
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