Denomination: 'PPS02-368'
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: 2005-06-17
Application Number: 05-4971
Protective direction granted: 2005-06-17
Grant of Rights Date: 2007-05-15
Certificate Number: 2735
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2009-05-15
Date rights surrendered: 2015-02-11

Variety Description

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

Summary: 'PPS02-368' flowers later than the reference varieties. The flower petal of 'PPS02-368' is slightly narrower than 'PPS02-364' and 'Ebony'. 'PPS02-368' has a shorter beak than the reference varieties. At maturity, the plant height of 'PPS02-368' is taller than the reference varieties. 'PPS02-368' has a higher oil content, in percentage of whole dried seed than 'PPS98-274'. The glucosinolate levels of 'PPS02-368' is lower than in 'PPS98-274' and 'Ebony'. 'PPS02-368' is resistant to glufosinate ammonium herbicides while 'Ebony' is not. The blackleg resistance of 'PPS02-368' is slightly better than in 'Ebony'.


PLANT: inbred, glufosinate ammonium resistant, spring seasonal type, tall to very tall plant height at maturity

COTYLEDON: narrow to medium, medium length

LEAF: medium green, very few to few number of lobes, sharp type margin, medium density of shallow to medium depth dentations, medium to long, wide, medium to long petiole

FLOWERS: yellow, petals medium in length and width

SILIQUE: semi-erect to horizontal attitude, medium length and width, short beak, medium length pedicel

SEED: black

AGRONOMIC CHARACTERISTICS: good resistance to lodging

QUALITY CHARACTERISTICS: erucic acid 0.01% of total fatty acids, oil content 48.9% of whole dried seed, protein 24.1% of dried oil free meal, very low glucosinolates less than 10 µmol/g

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

Origin & Breeding History: 'PPS02-368' is a restorer line in the process of F1 hybrid production. It was derived as a doubled haploid line 99-97-299 containing the Rf3 gene in the homozygous state, from a cross and doubled haploid extraction made in Canada in 1999. The pedigree is as follows: 99NN101205 // 99CBN092/99CBN093. 'PPS02-368' was selected in 2001, on the basis of fertility restoration and expression of tolerance to glufosinate ammonium herbicide. Other selection criteria were height, vigour, maturity, blackleg resistance, oil content, fatty acid profile, glucosinolate content and combining ability.

Tests & Trials: Test and trials were conducted in Saskatoon, Saskatchewan during the summers of 2004 and 2005. Plots consisted of 3 rows that were spaced 50 cm apart with a row length of 6 meters. There were two replicates arranged in a RCB design.

Comparison tables for 'PPS02-368' with reference varieties 'PPS98-274', 'PPS02-364' and 'Ebony'

Means are based on a two year average of 60 plant parts for silique, 60 for leaf and petal characteristics, 60 for height and 40 cotyledon measurements. Differences are significant at the 2% probability level based on LSD values.

Days to flowering

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 51.0 48.5 45.5 47.5

Flower petal width (mm)

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 5.5 6.0 6.25 7.55
std. deviation 0.764 0.529 0.887 0.996

Beak length (mm)

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 9.2 11.7 12.3 14.3
std. deviation 1.311 1.547 1.761 2.463

Plant height at maturity (cm)

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 142 131 112 123
std. deviation 12.178 7.545 6.711 8.658

Oil content (% of whole dried seed)

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 48.9 45.7 48.7 48.6

Glucosinolates (µmol/g)

  'PPS02-368' 'PPS98-274' 'PPS02-364' 'Ebony'
mean 7.01 10.5 6.75 9.3

Click on image for larger view
Canola: Variety 'PPS02-368' (left) with reference varieties 'PPS98-274' (center left), 'PPS02-364' (center right) and 'Ebony' (right)

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