Denomination: 'PB4CN285'
Botanical Name: Brassica napus
Applicant/Holder: Bayer CropScience Inc.
Site 600, R.R. #6
P.O. Box 117
Saskatoon, Saskatchewan
S7K 3J9
Breeder: Stewart Brandt, Bayer CropScience Inc., Saskatoon, Saskatchewan
Application Date: 2015-06-23
Application Number: 15-8667
Grant of Rights Date: 2017-08-25
Certificate Number: 5537
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2019-08-25
Grant of Rights Termination Date: 2037-08-25

Note: The applicant has requested an exemption from compulsory licensing to allow time to multiply and distribute propagating material of the variety. If the exemption is granted, it may be allowed for two years from the date rights are granted for the variety.

Variety Description

Varieties used for comparison: 'PB1CN231', 'PPS01-140 B-Line' and '5440'

Summary: The cotyledon of 'PB4CN285' is shorter than those of 'PB1CN231' and '5440'. The petal of 'PB4CN285' is larger than that of 'PB1CN231' and it is longer than that of 'PPS01-140 B-Line'. The silique of 'PB4CN285' is longer than the reference varieties. The beak of 'PB4CN285' is longer than those of 'PB1CN231' and 'PPS01-140 B-Line'. 'PB4CN285' has a shorter pedicel than that of '5440'. At maturity, the plant of 'PB4CN285' is taller than the reference varieties. The seed coat of 'PB4CN285' is black whereas it is brown for 'PB1CN231'.


PLANT: male fertile inbred line, spring type, medium to tall at maturity

COTYLEDON: narrow to medium width, medium length

LEAF: medium green, medium number of lobes, rounded margin, medium density of medium depth margin dentations, short, narrow, short to medium length petiole

FLOWER PETAL: yellow, medium length, narrow

SILIQUE: semi-erect to horizontal attitude, medium to long, medium length beak, long pedicel
SEED COAT: black

AGRONOMIC CHARACTERISTICS: fair to medium resistance to lodging
QUALITY CHARACTERISTICS: erucic acid is 0.02 % of total fatty acids, oil content is 44.9% of whole dried seed, protein is 44.5% of dried oil free meal, low glucosinolates (14.8 µmol/g)
CHEMICAL REACTION: susceptible to glufosinate ammonium herbicides
DISEASE REACTION: resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam)

Origin & Breeding History: 'PB4CN285' is the male fertile maintainer line of 'PA4CN185'. It is a non-transgenic double haploid line which was extracted in 2010 from the F1 generation of a cross produced at Bayer CropScience in Saskatoon, Canada in 2009. 'PB4CN285' was selected in 2013 and 2014 on the basis of per se performance of height, vigour, maturity, blackleg resistance, oil content, fatty acid profile and glucosinolate content.

Tests & Trials: The comparative trials conducted during the summers of 2014 and 2015 in Saskatoon, Saskatchewan were set up in a RCB Design with 3 replications per variety. Each year, the plots consisted of 3 rows that were 6 metres in length with a spacing of 25 cm between rows and 50 cm between plots. The measured characteristics were based on 30 measurements of the cotyledon, leaf, flower and plant height and 60 measurements of the silique. The means were based on a two year average. Mean differences were significant at the 2% probability level based on LSD values.

Comparison tables for 'PB4CN285' with reference varieties 'PB1CN231', 'PPS01-140 B-Line' and '5440'

Cotyledon length (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=1.5) 12.7 13.9 13.0 13.9
std. deviation 1.0 0.9 1.5 1.1

Flower petal length (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=1.0) 16.8 14.0 14.3 15.5
std. deviation 1.7 1.6 2.3 2.2

Flower petal width (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=0.7) 8.0 6.4 7.8 7.5
std. deviation 1.0 1.1 1.5 1.5

Silique length (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=3.4) 65.9 50.5 56.4 61.0
std. deviation 6.7 5.9 5.2 4.7

Beak length (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=1.2) 11.6 9.4 6.2 10.8
std. deviation 2.0 1.2 1.2 1.8

Pedicel length (mm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=1.5) 17.2 17.4 15.7 22.0
std. deviation 4.2 3.8 3.5 5.6

Plant height at maturity (cm)

  'PB4CN285' 'PB1CN231' 'PPS01-140 B-Line' '5440'
mean (LSD=5.2) 135 120 125 127
std. deviation 12 11 10 11

Click on image for larger view
Canola: 'PB4CN285' (far left) with reference varieties 'PPS01-140 B-Line' (centre left), 'PB1CN231' (centre right) and '5440' (far right)

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