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CDC Rowland


Denomination: 'CDC Rowland'
Previously Proposed Denomination: 'FP2513'
Botanical Name: Linum usitatissimum
Applicant/Holder: University of Saskatchewan
Crop Development Centre
4D36 Agriculture Building, 51 Campus Drive
Saskatoon, Saskatchewan
S7N 5A8
Breeder: Helen Booker, University of Saskatchewan, Crop Development Centre, Saskatoon, Saskatchewan
Application Date: 2018-02-27
Provisional Protection:: 2018-02-27
Application Number: 18-9383
Grant of Rights Date: 2019-11-29
Certificate Number: 6093
Grant of Rights Termination Date: 2039-11-29

Variety Description

Varieties used for comparison: 'CDC Bethune' and 'CDC Sorrel'

Summary: At the time of flowering, the plants including branches of 'CDC Rowland' are shorter than the plants of 'CDC Sorrel'. When fully open, the corolla on 'CDC Rowland' is violet whereas the corolla on 'CDC Bethune' is blue. The stigma on 'CDC Rowland' is white whereas the stigma on 'CDC Bethune' is violet. The 1000 seed weight is greater for 'CDC Rowland' when compared to both reference varieties.


HYPOCOTYL: medium to strong intensity of anthocyanin colouration

FLOWER: first flower present on 10 percent of plants at 48 days from planting, violet crown at bud stage, absent or very weak sepal dotting at bud stage, when fully open corolla is small to medium sized and flattened disc shaped, violet when fully developed, no longitudinal folding of the petals, overlapping petals, moderately elongated petal
STAMEN: filament white at distal and basal ends, blue anthers, yellow pollen
STYLE: white at distal end, pale blue at basal end
STIGMA: white

BOLL: medium sized at maturity, medium length to width ratio, semi-dehiscent, ciliation of false septa present, matures early to mid-season
SEED: medium brown, large, moderately elongated

AGRONOMY: good resistance to shattering, capsule loss and lodging; low tendency of producing basal branching
USE: oilseed type

Origin & Breeding History: 'CDC Rowland' (experimental designation 'FP2513' and 'HY12139') originated from a controlled cross between two F6 breeding lines at the University of Saskatchewan in 2009. The F2 population was grown at the Kernen Crop Research Farm in 2010. The bulked F3 population was grown in 2011 in a replicated yield trials in Saskatchewan at the Kernen Crop Research Farm, Floral, and Melfort Research Station. Two hundred plants were selected and grown in single plant progeny rows in Brawley, California. The 'HY12139' selected line was planted in the spring of 2012 in replicated yield test at the Kernen Crop Research Farm. 'HY12139' was further evaluated in replicated yield trials in 2013 and 2014 at multiple locations in Saskatchewan and British Columbia. 'HY12139' was entered into the Linseed Cooperative Trial as 'FP2513' and subsequently tested again in 2016. All selections were based on yield, days to maturity, percent seed oil content, and iodine value on a dry weight basis.

Tests & Trials: Tests and trials were conducted in 2017 and 2018 at the Kernen Crop Research Farm, Saskatoon, Saskatchewan. Trials consisted of 3 replications of each variety in a randomized complete block design. There were 6 rows (3.66 metres long and 16 cm apart) per replicate. Measured characteristics were based on 20 measurements. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.

Comparison tables for 'CDC Rowland' with reference varieties 'CDC Bethune' and 'CDC Sorrel'

Natural plant height including branches (cm)

  'CDC Rowland' 'CDC Bethune' 'CDC Sorrel'
mean (2017) 45.0 50.8 55.5
std. deviation (2017) 3.16 6.06 3.25
mean (2018) 48.9 48.0 54.8
std. deviation (2018) 5.36 4.28 4.07

Seed weight per 1000 seeds measured at maturity (g)

  'CDC Rowland' 'CDC Bethune' 'CDC Sorrel'
mean (2017) 7.07 5.81 6.51
std. deviation (2017) 0.09 0.04 0.08
mean (2018) 6.92 5.93 6.66
std. deviation (2018) 0.23 0.20 0.12

Click on image for larger view
CDC Rowland
Flax: 'CDC Rowland' (top) with reference varieties 'CDC Sorrel' (centre) and 'CDC Bethune' (bottom)

Click on image for larger view
CDC Rowland
Flax: 'CDC Rowland' (top) with reference varieties 'CDC Sorrel' (centre) and 'CDC Bethune' (bottom)

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