Denomination: 'PR0CN446'
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: 2011-07-19
Application Number: 11-7336
Protective direction granted: 2011-07-19
Grant of Rights Date: 2015-02-10
Certificate Number: 4983
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2017-02-10
Grant of Rights Termination Date: 2033-02-10

Variety Description

Varieties used for comparison: 'PPS98-274', 'PPS02-364', '5030' and 'PR0CN427'

Summary: The petal of 'PR0CN446' is longer and wider than that of 'PR0CN427'. 'PR0CN446' has a shorter silique than 'PPS98-274' and 'PPS02-364'. The silique attitude of 'PR0CN446' is semi-erect while it is horizontal for 'PR0CN427'. The beak of 'PR0CN446' is longer than '5030'. 'PR0CN446' has a longer pedicel than 'PPS02-364'. At maturity, the plant height of 'PR0CN446' is shorter than 'PPS98-274' and '5030'. 'PR0CN446' has a higher oil content as a percentage in whole dried seed than 'PPS98-274'. The protein content as a percentage of dried oil free meal of 'PR0CN446' is lower than the reference varieties.


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

COTYLEDON: medium width, medium to long length

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

FLOWER PETAL: yellow, medium length, medium width

SILIQUE: semi-erect attitude, short to medium length, long beak, medium to long pedicel

SEED: black

AGRONOMIC CHARACTERISTICS: good resistance to lodging
QUALITY CHARACTERISTICS: erucic acid is 0.01% of total fatty acids, oil content is 48.1% of whole dried seed, protein is 43.4% of dried oil free meal, very low glucosinolates (6.33 µmol/g)
DISEASE RESISTANCE: resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam)

Origin & Breeding History: 'PR0CN446' is a restorer line in the process of F1 hybrid production. It was derived as a doubled haploid line 08-373-047 containing the Rf3 gene construct in homozygous state. The cross was made in 2007 with the doubled haploid line being extracted in 2008. 'PR0CN446' was selected in 2009 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, fatty acid profile, glucosinolate content and combining ability.

Tests & Trials: Trials were conducted in the summers of 2010 and 2011 in Saskatoon, Saskatchewan. An additional trial in the summer of 2013 was conducted to confirm that the candidate varieties 'PR0CN446' and 'PR0CN427' were distinct from each other. Plots each year consisted of 3 rows with a row length of 6 metres and a row spacing of 50 cm. In 2010, the trial was set up as 8 x 9 lattice with 3 replications. In 2011 and 2013, the trials were set up as a RCBD with 3 replications. There were 40 measurements of the cotyledon characteristics, 30 measurements of the leaf, flower and plant height characteristics and 60 measurements for the silique characteristics. The means of 'PR0CN446' and the reference varieties are based on a two year average whereas the means of the candidate varieties 'PR0CN446' and 'PR0CN427' are based on a three year average. Differences on the two and three year averages are significant at the 2% and 5% probability level based on LSD values, respectively.

Comparison tables for 'PR0CN446' with reference varieties 'PPS98-274', 'PPS02-364', '5030' and 'PR0CN427'

Petal length (mm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=0.4) 14.1 - - - 13.3
std. deviation 0.7 - - - 0.6

Petal width (mm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=0.3) 6.3 - - - 5.1
std. deviation 0.5 - - - 0.7

Silique length (mm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=4.2) 57.7 66.2 62.4 60.3 -
std. deviation 3.6 5.6 5.6 4.9 -

Beak length (mm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=2.6) 13.4 12.7 12.7 9.4 -
std. deviation 2.0 1.9 1.6 1.8 -

Pedicel length (mm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=2.9) 20.0 21.3 16.8 18.9 -
std. deviation 2.2 2.5 2.5 2.7 -

Plant height at maturity (cm)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean (LSD=7) 106 118 105 128 -
std. deviation 8 8 9 11 -

Oil content (% in whole dried seed)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean 48.1 46.0 46.6 47.4 -

Protein content (% of dried oil free meal)

  'PR0CN446' 'PPS98-274' 'PPS02-364' '5030' 'PR0CN427'
mean 43.4 49.2 47.9 45.7 -

Click on image for larger view
Canola: 'PR0CN446' (far left) with reference varieties 'PPS98-274' (centre left), 'PPS02-364' (centre right) and '5030' (far right)

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