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VT 50


Denomination: 'VT 50'
Botanical Name: Linum usitatissimum
Applicant/Holder: Nutrien Ag Solutions (Canada) Inc.
13131 Lake Fraser Drive SE
Calgary, Alberta
T2J 7E8
Breeder: J.C. Paul Dribnenki, Viterra Inc., Vegreville, Alberta
Application Date: 2007-08-22
Application Number: 07-5987
Grant of Rights Date: 2011-11-14
Certificate Number: 4209
Grant of Rights Termination Date: 2029-11-14

Variety Description

Varieties used for comparison: '2047', '2149' and 'CDC Gold'

Summary: The plants of '50' are shorter than those of '2149'. Stem length of '50' is shorter than those of '2149' and 'CDC Gold'. Sepal dotting of '50' is very weak whereas it is weak to medium on '2047' and medium on '2149' and 'CDC Gold'. '50' flowers and matures later than all the reference varieties. '50' has a smaller seed size than the reference varieties. '50' has a high capability to produce basal branching whereas it is medium in '2047', low in '2149' and low to medium in 'CDC Gold'. '50' has significantly higher linolenic fatty acid and iodine content than the reference varieties.


FLOWER: very weak sepal dotting, violet colour of crown at bud stage, flattened disk shape, medium sized corolla, violet corolla, no longitudinal folding of the petals
STAMEN: blue anthers
FILAMENT: blue at distal end, white at base
STIGMA: pale to medium violet
STYLE: violet at distal end, blue at basal end

BOLL: medium size, ciliation of the false septa present, indehiscent
SEED: yellow, medium size

DISEASE RESISTANCE: resistant to flax rust (Melampsora lini) and moderately resistant to flax wilt (Fusarium oxysporum f. sp. lini)

AGRONOMY: late maturity, good resistance to shattering, capsule loss and lodging, high capability to produce basal branching

Origin & Breeding History: '50' was developed from the cross, '00-44-F3-64'/'Linola 2047', conducted in 2001 by Viterra/United Grain Growers Limited originally located in Morden, Manitoba. The line was advanced using the pedigree method using yellow seed coat, linolenic fatty acid, high oil content, early maturity, vigour, rust and wilt resistance and lodging resistance as selection criteria. Single plant selections were made in the F3 and F4 generations. An F5 line, designated '01-91-F7-1401', was selected and harvested in bulk in 2004. This line was tested in the 2005 and 2006 Contract Registration test as 'CR50'. In 2006, breeder seed was bulked from pure lines grown at Rosebank, Manitoba.

Tests & Trials: Tests and trials for '50' were conducted during the summers of 2008 and 2010 at the Alberta Innovates Technology Futures research facility in Vegreville, Alberta. The trial consisted of 4 replicates of 6-row plots that were approximately 3.0 meters in length with a row spacing of 17.5 centimeters. Data was collected from 40 measurements in each test year.

Comparison tables for 'VT 50' with reference varieties '2047', '2149' and 'CDC Gold'

Natural plant height - including branches (cm)

  'VT 50' '2047' '2149' 'CDC Gold'
mean 59.1 60.4 67.4 60.2
std. deviation 9.6 6.4 10.1 7.8

Stem length (cm)

  'VT 50' '2047' '2149' 'CDC Gold'
mean 32.1 33.4 34.9 36
std. deviation 6.4 4.7 9.7 6.7

Flowering date

  'VT 50' '2047' '2149' 'CDC Gold'
days to first bloom 63 62 62 60

Maturity date

  'VT 50' '2047' '2149' 'CDC Gold'
days to 75% brown capsules 118 115 113 106

Seed size (grams per 100 seeds)

  'VT 50' '2047' '2149' 'CDC Gold'
mean 5.3 6.0 5.8 6.0
std. deviation 0.4 0.1 0.5 0.5

Linolenic oil content

  'VT 50' '2047' '2149' 'CDC Gold'
% of oil 69.7 2.3 2.3 2.8

Iodine number

  'VT 50' '2047' '2149' 'CDC Gold'
mean 215 148 150 147

Click on image for larger view
VT 50
Flax: '50' (left) with reference varieties '2047' (left of centre), '2149' (second from right) and 'CDC Gold' (right)

Click on image for larger view
VT 50
Flax: '50' (left) with reference varieties '2047' (left of centre), '2149' (second from right) and 'CDC Gold' (right)

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