AAC Bravo

Flax

Denomination: 'AAC Bravo'
Botanical Name: Linum usitatissimum
Applicant/Holder: Deutsche Saatveredelung AG (DSV)
Weissenburger Strasse 5
59557
Lippstadt
Germany
Breeder: Scott Duguid, Agriculture & Agri-Food Canada, Morden, Manitoba
Heino Schaupp, Deutsche Saatveredelung AG (DSV), Lippstadt, Germany
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
6000 C&E Trail
Lacombe, Alberta
T4L 1W1
Canada
Tel: (403) 782-8126
Application Date: 2012-02-24
Application Number: 12-7521
Grant of Rights Date: 2014-08-25
Certificate Number: 4857
Grant of Rights Termination Date: 2032-08-25

Variety Description

Varieties used for comparison: 'Hanley', 'Macbeth', 'CDC Bethune', 'CDC Sorrel' and 'Prairie Thunder'

Summary: The plants of 'AAC Bravo' are taller than those of 'Hanley' and 'Prairie Thunder' and shorter than those of 'CDC Sorrel'. At bud stage, 'AAC Bravo' has no or very weak sepal dotting whereas 'Hanley' has medium to strong and 'Macbeth' has weak. The flower petals of 'AAC Bravo' are longer and wider than those of the reference varieties. The stigma of 'AAC Bravo' is white whereas it is pale blue on 'Hanley' and 'CDC Bethune', and pale violet on 'Macbeth'. At maturity, the boll of 'AAC Bravo' is medium size whereas it is large on 'CDC Bethune' and 'CDC Sorrel'. 'AAC Bravo' has no ciliation of the false septa whereas it is present in 'Hanley' and 'CDC Sorrel'. 'AAC Bravo' is later maturing than 'Hanley'.

Description:

HYPOCOTYL: weak anthocyanin colouration

FLOWER: absent or very weak sepal dotting at bud stage, flattened disk shape, medium sized corolla, blue, no longitudinal folding of the petals
STAMEN: white filament, blue anthers
PISTIL: white at distal end and blue at basal end of style, white stigma

CAPSULE: medium size, no ciliation of the false septa, semi-dehiscent
SEED: early maturing, medium brown, medium size

DISEASE RESISTANCE: immune to flax rust (Melampsora lini), moderately resistant to flax wilt (Fusarium oxysporum f. sp. lini) and powdery mildew (Oidium lini)

AGRONOMY: good resistance to shattering, lodging and capsule loss

USE: oilseed flax variety

Origin & Breeding History: 'AAC Bravo' (experimental designation 'FP2270') was developed from the cross 'Flanders' by 'Pacific' conducted in 1995 in Lippstadt, Germany. The F2 was grown in Germany and subsequent generations were advanced in Canada under a collaborative research agreement with Agriculture and Agri-Food Canada using the pedigree method with selection pressure for oil content, oil quality, lodging resistance and rust resistance in nurseries and yield trials in Canada and winter nurseries in California. Single plant selections were conducted in the F3 and F5 generations. An F9 line, designated M7970, was selected and evaluated in preliminary yield trials in 2006 and for Fusarium wilt in the Fusarium Wilt nurseries in Manitoba and Saskatchewan. The line was evaluated as M7970 in 2007 Canadian Flax Evaluation Trials at 6 locations in Manitoba, Saskatchewan and British Columbia. This line was entered in the Flax Cooperative test from 2008 to 2010 as 'FP2270'.

Tests & Trials: Tests and trials were conducted during the summers of 2011 and 2012 in Morden, Manitoba. Plots consisted of 6 rows that were 5.5 metres in length with a row spacing of 18 centimetres. There were 2 replicates per variety arranged in a Randomized Complete Block (RCB) design.


Comparison tables for 'AAC Bravo' with reference varieties 'Hanley', 'Macbeth', 'CDC Bethune', 'CDC Sorrel' and 'Prairie Thunder'

Plant: natural height (cm)

  'AAC Bravo' 'Hanley' 'Macbeth' 'CDC Bethune' 'CDC Sorrel' 'Prairie Thunder'
mean 45.5 40.3 43.8 46.8 50.3 42.5
std. deviation 3.0 2.6 5.9 3.5 4.3 1.7

Flower petal length (mm)

  'AAC Bravo' 'Hanley' 'Macbeth' 'CDC Bethune' 'CDC Sorrel' 'Prairie Thunder'
mean 14.6 12.6 12.5 13.4 12.7 12.4
std. deviation 0.5 1.0 1.3 0.9 1.0 0.7

Flower petal width (mm)

  'AAC Bravo' 'Hanley' 'Macbeth' 'CDC Bethune' 'CDC Sorrel' 'Prairie Thunder'
mean 10.9 9.5 8.9 9.6 8.7 9.1
std. deviation 0.8 0.7 0.6 0.7 0.6 1.1

Capsule maturity (75% of capsules brown)

  'AAC Bravo' 'Hanley' 'Macbeth' 'CDC Bethune' 'CDC Sorrel' 'Prairie Thunder'
No. of days 88.8 86 88.5 88 90 87.3

Click on image for larger view
AAC Bravo
Flax: 'AAC Bravo' (second from right) with reference varieties 'Prairie Thunder' (far left), 'MacBeth' (second from left), 'Sorrel' (centre left), 'Hanley' (centre right) and 'Bethune' (far right)

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