Denomination: '9551'
Previously Proposed Denomination: 'SW G5246 RR'
Botanical Name: Brassica napus
Applicant/Holder: Lantmännen SW Seed AB
Onsjövägen 13
SE-268 81
Breeder: Lantmännen SW Seed AB, Svalöv, Sweden
Agent in Canada: Lantmännen SW Seed Ltd.
510 Blackthorn Crescent
Saskatoon, Saskatchewan
S7V 1A8
Tel: 306-955-9620
Application Date: 2004-06-21
Application Number: 04-4250
Grant of Rights Date: 2007-03-26
Certificate Number: 2720
Date rights surrendered: 2015-03-26

Variety Description

Varieties used for comparison: 'SW ARROW' and 'Impulse'

Summary: '9551' differs from 'SW ARROW' and 'Impulse' in glyphosate tolerance, leaf lobing, leaf margin type and silique beak length. '9551' is resistant to glyphosate herbicides whereas 'Impulse' is not. The leaves of '9551' have a medium number of lobes whereas 'SW ARROW' and 'Impulse' have few. The leaves of '9551' have sharp margins with medium to deep dentations whereas the margins are rounded with medium depth dentation in 'SW ARROW' and rounded margins with shallow dentation in 'Impulse'. The silique beak of '9551' is long whereas it is medium in length in 'Impulse'.


PLANT: open-pollinated Round-up Ready spring seasonal type, medium to medium tall at maturity

LEAF: dark green, medium number of lobes, sharp margins with medium to deep dentation

FLOWERS: yellow

SILIQUE: medium in length, medium to long beak, long pedicel

SEED: black

QUALITY CHARACTERISTICS: erucic acid 0.03% of total fatty acids, high glucosinolate content less than 30 µmol/g

Origin & Breeding History: '9551' was developed by Svalöf Weibull AB, Svalöv, Sweden.The variety was derived from a cross made in 1998, with selections made in the F2 based on quality traits and blackleg tolerance. Pedigree selection was performed in subsequent generations with one of the last selections being the original plant of '9551'. Breeder seed multiplication began on the F5 generation.

Tests & Trials: Tests and trials were conducted during the summers of 2004 and 2005 at Saskatoon, Saskatchewan. Plots consisted of 2 replicates of 8 rows spaced 15 cm apart, were 1.75 metres wide and 3.25 metres long. Plots were laid out in randomized complete block design.

Comparison tables for '9551' with reference varieties 'SW ARROW' and 'Impulse'

Means are based on a two year average of 60 plant parts for silique measurements. Differences are significant at the 2% probability level based on LSD values.

Days to flowering (days from planting when 50% of plants show one or more flowers open)

  '9551' 'SW ARROW' 'Impulse'
mean 46.5 46.5 49.25

Silique beak length (mm)(p less than 0.001)

  '9551' 'SW ARROW' 'Impulse'
mean 13.0 9.1 9.4
std. deviation 2.308 4.478 7.727

Silique pedicel length (mm)(p less than 0.001)

  '9551' 'SW ARROW' 'Impulse'
mean 22.3 20.6 19.4
std. deviation 4.674 4.853 3.652

Plant height at maturity (cm)

  '9551' 'SW ARROW' 'Impulse'
mean 119.1 112.1 114.6
std. deviation 7.913 12.808 7.890
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