AAC Brigham

Wheat

Variety Description

Varieties used for comparison: 'AAC Weyburn', 'AAC Marchwell', 'AAC Succeed' and 'CDC Carbide'

Summary: The coleoptile of ‘AAC Brigham' has a weak to medium intensity of anthocyanin colouration while the coleoptile of ‘AAC Weyburn' has a strong to very strong intensity of anthocyanin colouration and those of ‘AAC Succeed' and ‘CDC Carbide' have a strong intensity of anthocyanin colouration. At booting, ‘AAC Brigham' has a low frequency of plants with recurved flag leaves while 'AAC Weyburn', 'AAC Marchwell' and 'AAC Succeed' have a medium frequency of plants with recurved flag leaves and 'CDC Carbide' has a medium to high frequency of plants with recurved flag leaves. The flag leaf of ‘AAC Brigham' is shorter than those of the reference varieties. The flag leaf sheath of ‘AAC Brigham' has a strong degree of glaucosity while that of ‘AAC Marchwell' has a medium degree of glaucosity. At heading, the spike of ‘AAC Brigham' has a medium degree of glaucosity while the spike of ‘AAC Weyburn' has a weak degree of glaucosity and that of ‘CDC Carbide' has a strong degree of glaucosity. The culm of ‘AAC Brigham' has a medium degree of glaucosity while the culm of ‘AAC Weyburn' has a weak degree of glaucosity. At maturity, the plants, including the spike and awns, of ‘AAC Brigham' are shorter than those of the reference varieties. The straw of ‘AAC Brigham' has a thin pith in cross section while the straw of ‘AAC Weyburn' has a thick pith in cross section. The spike, excluding the awns, of 'AAC Brigham' is shorter than those of ‘AAC Weyburn' and ‘CDC Carbide'. The awns of ‘AAC Brigham' are white while those of ‘AAC Weyburn' are black. The kernel weight of 'AAC Brigham' is less than that of ‘AAC Succeed'.

Description:

PLANT: durum wheat, spring type, semi-erect growth habit at 5 to 9 tiller stage, low frequency of plants with recurved flag leaves, heads emerge mid-season

SEEDLING (4 LEAF STAGE): weak to medium intensity of anthocyanin colouration of coleoptile, glabrous sheaths and blades of lower leaves

FLAG LEAF: absent or very weak intensity of anthocyanin colouration of auricles, strong degree of glaucosity of sheath, absent or very weak degree of glaucosity of lower side of blade, glabrous blade and sheath

CULM NECK: absent or very sparse hairiness of upper most node, medium degree of glaucosity at heading, curved at maturity
STRAW (AT MATURITY): thin pith in cross-section, no anthocyanin colouration

SPIKE: medium degree of glaucosity at heading, tapering shape in profile, dense, off-white at maturity, erect attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: longer than spike, white at maturity
LOWER GLUME: medium oblong, medium length and width, glabrous
LOWER GLUME SHOULDER: narrow, slightly sloping
LOWER GLUME BEAK: short, slightly curved
LOWEST LEMMA: straight to slightly curved beak

KERNEL: amber, large, long, medium width, elliptical shape, rounded cheek
GERM: oval

RESISTANCE TO SHATTERING: good

PASTA QUALITY: good

DISEASE REACTIONS: resistant to Leaf Rust (Puccinia triticina), Stem Rust (Puccinia graminis f. sp. tritici), Stripe Rust (Puccinia striiformis) and Common Bunt (Tilletia caries, Tilletia foetida); moderately susceptible to Fusarium Head Blight (Fusarium graminearum, Fusarium spp.)

Origin & Breeding History: 'AAC Brigham' (experimental designations DT2010 and A1134-GP05B) originated from a three-way cross between 3 breeding lines designated A0463&AV013, A0537-AG03 and DT839 conducted in 2011 at the Swift Current Research and Development Centre of Agriculture and Agri-Food Canada in Swift Current, Saskatchewan. The variety was advanced to the F8 generation based on plant height, straw strength, maturity, agronomic characteristics, and disease reactions where one line, satisfying all selection criteria, was identified as A1134-GP05B in 2015. In 2016, A1134-GP05B was entered in the Durum Western ‘A' test and further advanced to the Durum-B tests in 2017 and 2018. The variety was entered in the Durum Registration Trials as DT2010 from 2019 to 2021. Breeder seed was established from 82 F14 breeder lines in 2021.

Tests & Trials: The comparative trials for 'AAC Brigham' were conducted at the Agriculture and Agri-Food Canada, Swift Current Research and Development Centre during the 2021 and 2023 growing seasons. There were 4 replicates arranged in an RCB design. Each plot consisted of 4 rows, each 3 metres long, with an inter-row spacing of 23 cm. The planting density was 270 seeds per metre squared resulting in approximately 2980 plants per variety per year. Measured characteristics were based on 20 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on LSD values. Disease reaction ratings were provided through the Disease Evaluation Team of the Prairie Recommending Committee for Wheat, Rye and Triticale from the registration trials conducted from 2019 to 2021.

Comparison tables for 'AAC Brigham' with reference varieties 'AAC Weyburn', 'AAC Marchwell', 'AAC Succeed' and 'CDC Carbide'

Flag leaf length (cm)

Plant height at maturity (stem plus spike including awns) (cm)

Spike length (excluding awns) (mm)

Kernel weight (grams per 1000 kernels) (g)

Click on image for larger view

Wheat: ‘AAC Brigham' (left) with reference varieties ‘AAC Weyburn' (centre left), ‘AAC Marchwell' (centre), ‘AAC Succeed' (centre right) and ‘CDC Carbide' (right)

Click on image for larger view

Wheat: ‘AAC Brigham' (left) with reference varieties ‘AAC Weyburn' (centre left), ‘AAC Marchwell' (centre), ‘AAC Succeed' (centre right) and ‘CDC Carbide' (right)