SW 99100920 RR


Denomination: 'SW 99100920 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: 2003-06-16
Application Number: 03-3725
Grant of Rights Date: 2006-08-31
Certificate Number: 2513
Date rights surrendered: 2014-08-31

Variety Description

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

Summary: 'SW99100920 RR' has a sharp leaf margin type while in 'SW Arrow' and 'Impulse' it is a rounded type. The time to flowering is shorter in 'SW99100920 RR' when compared to 'Impulse'. 'SW99100920 RR' has a longer silique than 'SW Arrow' but shorter than 'Impulse'. The beak of 'SW99100920 RR' is longer than 'SW Arrow' and 'Impulse'. 'SW99100920 RR' has a shorter pedicel than 'SW Arrow' and 'Impulse'. 'SW99100920 RR' is resistant to glyphosate herbicides while 'Impulse' is not. 'SW99100920 RR' is resistant to Blackleg (Leptosphaeria maculans) while 'SW Arrow' is susceptible.


'SW99100920 RR' is an open pollinated round-up ready spring canola variety. Leaf blades are medium to dark green in colour with medium to many lobes. The leaf margin is sharp with dentations that are deep. The flowers are yellow. The siliques are medium in length with a long beak and a short pedicel. The plants are medium in height at maturity. Seed colour is black. 'SW99100920 RR' has very low erucic acid content and very low glucosinolates. 'SW99100920 RR' is resistant to glyphosate herbicides. 'SW99100920 RR' is resistant to blackleg (Leptosphaeria maculans).

Origin & Breeding History: 'SW99100920 RR' was derived from a cross made in 1997 in Svalov, Sweden. Plant selection was made in the F2 for quality traits and blackleg tolerance. In subsequent generations pedigree selection was performed. One of the plants in the last selection is the original plant from which breeder seed has been produced. The line was tested for yield, oil content, glucosinolate content, stalk stiffness, blackleg tolerance and maturity.

Tests & Trials: Tests and trials were conducted during the summers of 2003/2004 in Aberdeen, Saskatchewan. Plots consisted of 8 rows, 3 meters in length with 15 cm row spacing. There were 2 replications laid out in a RCB design.

Comparison tables for 'SW 99100920 RR' with reference varieties 'SW Arrow' and 'Impulse'

P - probability value

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

  'SW 99100920 RR' 'SW Arrow' 'Impulse'
mean 49.25 49.25 52.25

Silique length (mm)

  'SW 99100920 RR' 'SW Arrow' 'Impulse'
mean 58.8 52.9 61.6
std. deviation 8.53 7.85 7.08
significance N/A p less than 0.01 p less than 0.01

Beak length (mm)

  'SW 99100920 RR' 'SW Arrow' 'Impulse'
mean 11.8 8.3 9.8
std. deviation 2.40 1.99 1.82
significance N/A p less than 0.01 p less than 0.01

Pedicel length (mm)

  'SW 99100920 RR' 'SW Arrow' 'Impulse'
mean 16.1 21.0 19.4
std. deviation 2.78 4.27 3.34
significance N/A p less than 0.01 p less than 0.01
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