AAC Stoughton

Wheat

Variety Description

Varieties used for comparison: 'AAC Brandon', 'AAC Goodwin', 'AAC Viewfield' and 'AAC Alida'

Summary: At the 4-leaf stage, the coleoptile of ‘AAC Stoughton' has a weak to medium intensity of anthocyanin colouration while the coleoptile of ‘AAC Brandon' has a medium to strong intensity of anthocyanin colouration and that of ‘AAC Alida' has a strong intensity of anthocyanin colouration. At booting, the flag leaf auricles of ‘AAC Stoughton' have an absent or very weak to weak intensity of anthocyanin colouration while the flag leaf auricles of ‘AAC Viewfield' have a weak to medium intensity of anthocyanin colouration and those of ‘AAC Alida' have a medium to strong intensity of anthocyanin colouration. The flag leaf sheath of ‘AAC Stoughton' has a medium degree of glaucosity while that of ‘AAC Viewfield' has strong glaucosity. At heading, the spike of ‘AAC Stoughton' has a medium degree of glaucosity whereas that of ‘AAC Viewfield' has strong glaucosity. At maturity, the plants of ‘AAC Stoughton' are taller than those of ‘AAC Brandon', ‘AAC Goodwin' and ‘AAC Viewfield'. The lower glume beak of ‘AAC Stoughton' is straight to slightly curved while that of ‘AAC Viewfield' is slightly to moderately curved. The plants of ‘AAC Stoughton' are resistant to Orange Wheat Blossom Midge while those of ‘AAC Brandon', ‘AAC Goodwin' and ‘AAC Viewfield' are susceptible.

Description:

PLANT: common wheat, spring type, intermediate growth habit at 5 to 9 tiller stage, medium to high frequency of plants with recurved flag leaves, heads emerge mid-season

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

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

CULM: medium to strong glaucosity at heading
STRAW (AT MATURITY): thin pith in cross-section, no anthocyanin colouration

SPIKE: medium degree of glaucosity at heading, tapering in profile, medium density, white at maturity, erect to inclined attitude
AWNS: shorter than spike length, white at maturity
LOWER GLUME SHOULDER: medium to broad, slightly sloping to straight shape
LOWER GLUME BEAK: short, straight to slightly curved shape

KERNEL: hard red type, dark red

INSECT REACTIONS: resistant to Orange Wheat Blossom Midge (Sitodiplosis mosellana)

Origin & Breeding History: ‘AAC Stoughton' (experimental designations B1467&AG039 and BW5095) was developed using a double haploid method of plant breeding. The variety resulted from a cross between the varieties 'AAC Goodwin' and ‘AAC Alida' conducted at the Agriculture and Agri-Food Canada, Swift Current Research and Development Centre in Swift Current, Saskatchewan in 2014. Haploids resulting from the maize pollen double haploid technique were screened with a molecular marker associated to the over expression of high-molecular-weight glutenin subunit Bx7 and selected plantlets were retained for chromosome doubling in 2016. Double haploid lines were advanced based on disease tolerances, maturity, plant height, shatter resistance and lodging with selected lines assessed for agronomic performance in multiple locations in Western Canada. Disease resistances were further assessed in disease nurseries in Manitoba and Saskatchewan with one DH line meeting all selection criteria designated as B1467&AG039 in 2017. B1467&AG039 was entered in the Western Bread Wheat ‘A_4' test in 2018, the Western Bread Wheat ‘B' test in 2019 and was entered as BW5095 in the Western Bread Wheat C Registration test from 2020 to 2022. Breeder seed production commenced in 2020 using seed harvested from the Western Bread Wheat ‘B' test increase.

Tests & Trials: The comparative trials for 'AAC Stoughton' were conducted at Agriculture and Agri-Food Canada, Swift Current Research and Development Centre in Swift Current, Saskatchewan during the 2022 and 2023 growing seasons. There were 4 replicates arranged in an RCB design. Each plot consisted of 4 rows, each row measuring 4.0 metres long, with an inter-row spacing of 23 cm. The planting density resulted in 3200 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.

Comparison table for 'AAC Stoughton' with reference varieties 'AAC Brandon', 'AAC Goodwin', 'AAC Viewfield' and 'AAC Alida'

Plant height (stem plus spike, including awns) (cm)

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Wheat: ‘AAC Stoughton' (left) with reference varieties ‘AAC Brandon' (centre left), ‘AAC Goodwin' (centre), ‘AAC Viewfield' (centre right) and ‘AAC Alida' (right)

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Wheat: ‘AAC Stoughton' (left) with reference varieties ‘AAC Brandon' (centre left), ‘AAC Goodwin' (centre), ‘AAC Viewfield' (centre right) and ‘AAC Alida' (right)

Click on image for larger view

Wheat: ‘AAC Stoughton' (left) with reference varieties ‘AAC Brandon' (centre left), ‘AAC Goodwin' (centre), ‘AAC Viewfield' (centre right) and ‘AAC Alida' (right)