Denomination: 'PPS05-251'
Botanical Name: Brassica napus
Applicant/Holder: Bayer CropScience Inc.
Site 600, R.R. #6
P.O. Box 117
Saskatoon, Saskatchewan
S7K 3J9
Breeder: Hieronim Polewicz, Bayer CropScience Inc., Saskatoon, Saskatchewan
Application Date: 2006-06-08
Application Number: 06-5499
Protective direction granted: 2006-06-08
Grant of Rights Date: 2008-05-26
Certificate Number: 3212
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2010-05-26
Date rights surrendered: 2015-02-11

Variety Description

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

Summary: 'PPS05-251' has a shorter pedicel than 'PPS98-274'. 'PPS05-251' flowers later than 'PPS02-364' and matures later than 'PPS98-274', 'PPS02-364' and 'Ebony'. 'PPS05-251' is resistant to glufosinate ammonium herbicides while 'Ebony' is not.


PLANT: male fertile line, glufosinate ammonium resistant, spring seasonal type, medium height at maturity

COTYLEDON: medium width, medium length

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

FLOWERS: yellow, petals medium in length, petals narrow to medium in width

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

SEED: black

AGRONOMIC CHARACTERISTICS: fair to good resistance to lodging

QUALITY CHARACTERISTICS: erucic acid 0.01% of total fatty acids, oil content 49.4% of whole dried seed, protein 23.9% of dried oil free meal, low glucosinolates 15.4 µmol/g

DISEASE RESISTANCE: resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam) and White Rust (Albugo candida, races 7a & 2v)

Origin & Breeding History: 'PPS05-251' is a restorer line (R-line in the process of F1 hybrid production). 'PPS05-251' was derived as a double haploid line 04-239-046 containing the Rf3 gene in a homozygous state. The cross was made in Canada in 2003 and the DH line extraction was made in Canada in 2003/2004. The pedigree of 'PPS05-251' is as follows: 02NN300302/01NN202767. 'PPS05-251' was selected in 2004 and 2005 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. Breeder Seed production commenced in the 2005 season.

Tests & Trials: Test and trials were conducted in Saskatoon, Saskatchewan during the summers of 2005 and 2006. There were two replications arranged in a randomized complete block design. Each plot consisted of 3 rows that were spaced 50 centimeters apart with a row length of 6 meters.

Comparison tables for 'PPS05-251' with reference varieties 'PPS98-274', 'PPS02-364' and 'Ebony'

Means are based on a two year average of 60 plant parts for silique, beak, pedicel and height characteristics. Differences are significant at the 2% probability level based on LSD values.

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

  'PPS05-251' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 44.7 43.0 40.5 43.2
significance N/A not significant p less than 0.01 not significant

Pedicel length (mm)

  'PPS05-251' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 19.8 22.9 18.6 20.0
significance N/A p less than 0.01 not significant not significant

Maturity (days from planting to maturity)

  'PPS05-251' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 105 96 95 98
significance N/A p less than 0.01 p less than 0.01 p less than 0.01

Click on image for larger view
Canola: 'PPS05-251' (far left) with reference varieties 'PPS98-274' (left center), 'PPS02-364' (right center) and 'Ebony' (far right)

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