PR7CN681

Canola

Variety Description

Varieties used for comparison: 'PPS02-364', 'PPS04-205' and '5440'

Summary: The cotyledon of 'PR7CN681' is longer than that of 'PPS04-205' and narrower than that of '5440'. The leaf of 'PR7CN681' has a rounded margin with very shallow to shallow indentations whereas the leaf of 'PPS02-364' has a sharp margin with indentations of medium depth. 'PR7CN681' has a shorter silique beak than that of 'PPS02-364'. 'PR7CN681' matures earlier than 'PPS02-364'. At maturity, the plant of 'PR7CN681' is shorter than that of '5440'. The seed coat of 'PR7CN681' is brown whereas it is black for the reference varieties.

Description:

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

COTYLEDON: medium to long, medium width

LEAF: medium green, medium number to many lobes, rounded margin, low density of very shallow to shallow margin indentations, medium length and width, short petiole

FLOWER PETAL: yellow, medium length and width

SILIQUE: horizontal attitude, short, short to medium length beak, short pedicel
SEED COAT: brown

AGRONOMIC CHARACTERISTICS: good resistance to lodging and shattering

QUALITY CHARACTERISTICS: erucic acid is 0.02% of total fatty acids, oil content is 51.5% of whole dried seed, protein is 42.4% of dried oil free meal, very low concentration of glucosinolates (8.4 µmol/g)

HERBICIDE REACTION: resistant to glufosinate ammonium herbicides

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

Origin & Breeding History: 'PR7CN681' 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 was made at BASF Canada Inc. in Saskatoon, Saskatchewan, Canada in 2013 and the subsequent double haploid line extraction was made in 2014. 'PR7CN681' was selected in 2017 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, seed pod shattering resistance, oil content, fatty acid profile, glucosinolate content and combining ability.

Tests & Trials: The comparative trials for 'PR7CN681' were conducted during the 2018 and 2019 growing seasons in Saskatoon, Saskatchewan. They were set up in a RCB Design with 3 replications per variety. Each year, the plots consisted of 3 rows that were 6 metres in length with a spacing of 25 cm between rows and 50 cm between plots. The planting density resulted in a total of approximately 1300 plants per variety. The measured characteristics were based on 30 measurements of the cotyledon, leaf, flower and plant height and 60 measurements of the silique. 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 'PR7CN681' with reference varieties 'PPS02-364', 'PPS04-205' and '5440'

Cotyledon length (mm)

Cotyledon width (mm)

Beak length (mm)

Days to maturity

Plant height at maturity (cm)

Click on image for larger view

Canola: 'PR7CN681' (left) with reference varieties 'PPS02-364' (centre left), 'PPS04-205' (centre right) and '5440' (right)