Denomination: 'PPS05-250'
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: 06-5498
Protective direction granted: 2006-06-08
Grant of Rights Date: 2008-05-26
Certificate Number: 3211
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: 'PPS05-250' flowers later than 'PPS02-364'. The pedicel of 'PPS05-250' is shorter than 'PPS98-274'. 'PPS05-250' matures later than 'PPS98-274', 'PPS02-364' and 'Ebony'. 'PPS05-250' 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 lobes, rounded to sharp margin, low to medium density of shallow to medium depth dentations, medium length, medium to broad width, short to medium petiole

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

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

SEED: black

AGRONOMIC CHARACTERISTICS: good resistance to lodging

QUALITY CHARACTERISTICS: erucic acid 0.01% of total fatty acids, oil content 51.3% of whole dried seed, protein 22.9% of dried oil free meal, low glucosinolates 13.3 µmol/g

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

Origin & Breeding History: 'PPS05-250' is a restorer line (R-line in the process of F1 hybrid production). 'PPS05-250' was derived as a doubled haploid line 04-239-023 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 'PPS05-250' is as follows: 02NN300302/01NN202767. 'PPS05-250' 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 'PPS05-250' with reference varieties 'PPS98-274', 'PPS02-364' and 'Ebony'

Means are based on a two year average of 60 plant parts for pedicel 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)

  'PPS05-250' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 43.7 43.0 40.5 43.2
significance N/A not significant p less than 0.01 not significant

Pedicel length (mm)

  'PPS05-250' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 18.5 22.9 18.6 20.0
significance N/A p less than 0.01 not significant not significant

Maturity (days from planting to maturity)

  'PPS05-250' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 103 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: 'PPS05-250' (far left) with reference varieties 'PPS98-274' (left center), 'PPS02-364' (right center) and 'Ebony' (far right)

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