PR22CN855

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: 'PPS02-364', 'PPS04-205' and '5440'

Summary: The cotyledon of ‘PR22CN855' is narrower than that of ‘5440'. ‘PR22CN855' has a shorter petiole than ‘5440'. Flowering occurs later for the plants of ‘PR22CN855' than for those of ‘PPS02-364' and ‘5440'. ‘PR22CN855' has a shorter silique beak than the reference varieties. Plant maturity occurs later for ‘PR22CN855' than for ‘PPS02-364' and ‘5440'. At maturity, the plants of ‘PR22CN855' are taller than those of the reference varieties.

Description:

PLANT: male fertile inbred line, spring type, tall to very tall at maturity

COTYLEDON: medium to long, medium width

LEAF: medium green, many lobes, rounded margin, medium density of medium depth margin indentations, medium length, narrow to medium width, short petiole

FLOWER PETAL: yellow, medium length and width

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

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

QUALITY CHARACTERISTICS: erucic acid is 0.02% of total fatty acids, oil content is 44.9% of whole dried seed, protein is 47.2% of dried oil free meal, low concentration of glucosinolates (11.0 µmol/g)

CHEMICAL REACTION: resistant to glufosinate ammonium herbicides

DISEASE REACTION: resistant to Blackleg (Leptosphaeria maculans asexual stage: Phoma lingam)

Origin & Breeding History: ‘PR22CN855' is a restorer line in the process of F1 hybrid production. It was derived as a double haploid line containing the Rf3 gene in a homozygous state. The cross between proprietary lines was made in Saskatoon, Saskatchewan, Canada in 2017 and the subsequent double haploid line extraction was made from the resulting F1 in 2018. ‘PR22CN855' was selected in 2020 on the basis of fertility restoration of numerous male sterile lines and expression of resistance to glufosinate-ammonium herbicide. Other selection parameters included height, vigour, maturity, blackleg resistance, seed pod shattering resistance, oil content, fatty acid profile, glucosinolate content and combining ability. Breeder seed production commenced in Saskatoon, Saskatchewan, Canada in 2020.

Tests & Trials: The comparative trials for ‘PR22CN855' 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.

Comparison tables for 'PR22CN855' with reference varieties 'PPS02-364', 'PPS04-205' and '5440'

Cotyledon width (mm)

Petiole length (cm)

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

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: ‘PR22CN855' (left) with reference varieties ‘PPS02-364' (centre left), ‘PPS04-205' (centre right) and ‘5440' (right)