Denomination: 'PR2CN542'
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: 2014-06-19
Application Number: 14-8368
Protective direction granted: 2014-06-19
Grant of Rights Date: 2016-05-25
Certificate Number: 5356
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2018-05-25
Grant of Rights Termination Date: 2036-05-25

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: 'PPS98-274', 'PPS02-364' and '5440'

Summary: The cotyledon of 'PR2CN542' is narrower than that of '5440' and it is shorter than that of 'PPS98-274'. The leaf of 'PR2CN542' has very few lobes whereas those of 'PPS98-274' and '5440' have a medium number of lobes. The leaf margin of 'PR2CN542' is rounded whereas it is sharp for 'PPS98-274' and 'PPS02-364'. The leaf of 'PR2CN542' is smaller than that of the reference varieties. 'PR2CN542' has a shorter petiole than 'PPS98-274' and '5440'. 'PR2CN542' flowers later than the reference varieties. The petal of 'PR2CN542' is shorter than that of the reference varieties and it is narrower than that of '5440'. 'PR2CN542' has a shorter silique, beak and pedicel than the reference varieties. At maturity, the plant of 'PR2CN542' is shorter than that of 'PPS98-274' and '5440'.


PLANT: male fertile restorer inbred line, spring type, short to medium height at maturity

COTYLEDON: medium width and length

LEAF: medium green, very few lobes, rounded margin, medium to dense density of shallow margin dentations, very short, very narrow, very short to short petiole

FLOWER PETAL: yellow, short to medium length, narrow to medium width

SILIQUE: semi-erect attitude, very short, short to medium length beak, short to medium length pedicel
SEED COAT: black

AGRONOMIC CHARACTERISTICS: good resistance to lodging
QUALITY CHARACTERISTICS: 0.01% erucic acid, oil content is 45.6% of whole dried seed, protein is 43.7% of dried oil free meal, very low glucosinolates (9.3 µmol/g)
CHEMICAL REACTION: resistant to glufosinate ammonium herbicides
DISEASE REACTION: resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam)

Origin & Breeding History: 'PR2CN542' is a restorer line in the process of F1 hybrid production. It was derived by crossing a doubled haploid line containing the Rf3 gene construct in homozygous state to a donor line. The cross was made in Canada in 2011. The final backcross was done in 2012. 'PR2CN542' was selected in 2012 on the basis of fertility restoration of numerous male sterile lines and expression of tolerance to glufosinate-ammonium herbicide. Other selection parameters included height, vigour, maturity, blackleg resistance, oil content, linolenic acid content, fatty acid profile, glucosinolate content and combining ability.

Tests & Trials: The comparative trials conducted during the summers of 2013 and 2014 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 'PR2CN542' with reference varieties 'PPS98-274', 'PPS02-364' and '5440'

Cotyledon length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=3.9) 12.0 14.3 12.5 13.6
std. deviation 0.9 1.2 1.1 1.1

Cotyledon width (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=3.7) 22.0 22.3 22.4 26.2
std. deviation 1.6 1.5 1.6 1.9

Leaf length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=13) 153 205 169 232
std. deviation 15 17 12 12

Leaf width (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=6) 71 98 85 104
std. deviation 6 10 7 8

Petiole length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=7) 61 67 56 86
std. deviation 8 10 8 9

Days to flower

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean 44 41 38 40

Flower petal length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=0.5) 11.6 14.4 14.2 14.0
std. deviation 0.4 0.6 0.7 0.6

Flower petal width (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=0.3) 5.6 5.9 5.7 6.3
std. deviation 0.3 0.4 0.4 0.4

Silique length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=2.4) 49.7 74.8 67.9 66.3
std. deviation 4.8 4.7 5.0 3.8

Beak length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=0.7) 10.0 13.2 14.3 11.8
std. deviation 1.3 1.3 1.2 1.3

Pedicel length (mm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=2.2) 19.8 26.6 22.7 25.0
std. deviation 3.0 4.1 4.9 6.4

Plant height at maturity (cm)

  'PR2CN542' 'PPS98-274' 'PPS02-364' '5440'
mean (LSD=5.8) 103 128 109 126
std. deviation 7 6 6 6

Click on image for larger view
Canola: 'PR2CN542' (far left) with reference varieties 'PPS02-364' (centre left), 'PPS98-274' (centre right) and '5440' (far right)

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