PB8CN258

Canola

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: 'PB1CN231', 'PPS01-140 B-Line' and '5440'

Summary: The cotyledon of ‘PB8CN258' is longer than that of ‘PPS01-140 B-Line' and narrower than that of ‘5440'. ‘PB8CN258' has a shorter leaf than ‘5440'. The petiole of ‘PB8CN258' is shorter than those of ‘PPS01-140 B-Line' and ‘5440'. The flower petal of ‘PB8CN258' is shorter than that of ‘5440'. ‘PB8CN258' has a shorter silique than ‘5440'. The silique beak of ‘PB8CN258' is longer than that of ‘PPS01-140 B-Line'. Plant maturity occurs later for ‘PB8CN258' than for ‘PPS01-140 B-Line'. At maturity, the plants of ‘PB8CN258' are shorter than those ‘5440'. The seed coat of ‘PB8CN258' is brown whereas it is black for ‘PPS01-140 B-Line' and ‘5440'. Based on the root symptoms observed, ‘PB8CN258' is resistant to Clubroot (Plasmodiophora brassicae) whereas the reference varieties are highly susceptible.

Description:

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

COTYLEDON: medium to long, medium width

LEAF: medium green, medium number of lobes, rounded margin, medium density of shallow to medium depth margin indentations, short, medium width, very short to short petiole

FLOWER PETAL: yellow, medium length and width

SILIQUE: erect to semi-erect attitude, very short to short, short beak, short pedicel
SEED COAT: brown

AGRONOMIC CHARACTERISTICS: good resistance to lodging, good resistance to shattering

QUALITY CHARACTERISTICS: erucic acid is 0.01% of total fatty acids, oil content is 47.1% of whole dried seed, protein is 47.3% of dried oil free meal, medium concentration of glucosinolates (18.7 µmol/g)

CHEMICAL REACTION: susceptible to glufosinate ammonium herbicides

DISEASE REACTIONS: moderately resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam); resistant to Clubroot (Plasmodiophora brassicae)

Origin & Breeding History: ‘PB8CN258' is a male fertile maintainer line of ‘PA8CN158'. It is a non-transgenic selected line which was derived by crossing an inbred line containing the Ms8 gene to a donor line, which was then crossed to a recurring parent in a backcrossing scheme. The initial cross was conducted in Gent, Belgium in 2017. ‘PB8CN258' was selected in 2018 based on its expression of resistance to glyphosate herbicide, per se performance, vigour, maturity, blackleg resistance, clubroot resistance, seed pod shattering resistance, oil content, fatty acid profile and glucosinolate content. Breeder seed production commenced in Gent, Belgium in 2019.

Tests & Trials: The comparative trials for ‘PB8CN258' were conducted during the 2022 and 2023 growing seasons in Saskatoon, Saskatchewan. Trials were arranged in a RCB design with 3 replications per variety. The plots consisted of 3 rows that were 6 metres in length with spacing of 25 cm between rows and 50 cm between plots. The planting density resulted in a total of approximately 1300 plants per variety per year. The measured characteristics were based on 30 measurements except for silique characteristics which were based on 60 measurements. The means were based on a two-year average. Mean differences were significant at the 2% probability level based on LSD values. Clubroot resistance was evaluated in-house at BASF in 2023 in a controlled environment using ‘98-55-013' and ‘PR9CN411' as the susceptible control varieties. The Clubroot resistance assessment protocol used was developed by the University of Alberta and Nutrien Ag Solutions Canada with input from Agriculture and Agri-Food Canada and the University of Guelph.

Comparison tables for 'PB8CN258' with reference varieties 'PB1CN231', 'PPS01-140 B-Line' and '5440'

Cotyledon length (mm)

Cotyledon width (cm)

Leaf length (cm)

Petiole length (cm)

Flower petal length (mm)

Silique length (mm)

Beak length (mm)

Days to maturity (number of days from planting to maturity)

Plant height (at maturity) (cm)

Click on image for larger view

Canola: ‘PB8CN258' (left) with reference varieties ‘PB1CN231' (centre left), ‘PPS01-140 B-Line' (centre right) and ‘5440' (right)