AB Stampeder

Triticale

Variety Description

Varieties used for comparison: 'Bunker' and 'Taza'

Summary: The intensity of anthocyanin colouration on the coleoptile of 'AB Stampeder' is strong while it is weak on the coleoptiles of 'Bunker' and 'Taza'. The flag leaf of 'AB Stampeder' is narrower than the flag leaves of 'Bunker' and 'Taza' and longer than the flag leaf of 'Taza'. The culm of 'AB Stampeder' has a medium density of pubescence while the culm of 'Bunker' has very dense pubescence and that of 'Taza' has dense pubescence. At the completion of stem extension, the plants of 'AB Stampeder' are shorter than those of the reference varieties. The lower glume of 'AB Stampeder' has hair present on the external surface while that of 'Taza' is hairless. Excluding the awns, the spike of 'AB Stampeder' is shorter than those of the reference varieties. The spike of 'AB Stampeder' is medium to broad in profile while those of the reference varieties are narrow to a medium width in profile.

Description:

COLEOPTILE: strong intensity of anthocyanin colouration
PLANT: hexaploid, spring type, semi-erect growth habit at tillering, low to medium frequency of plants with recurved flag leaves at booting, heads mid-season

FLAG LEAF: weak intensity of anthocyanin colouration on auricles, strong glaucosity of sheath

NECK OF CULM: slightly curved, medium density of pubescence
STRAW (STEM): pith of medium thickness in cross-section

SPIKE: strong glaucosity, half awned, white at maturity, lax, medium to broad in profile
ANTHERS: absent or very weak intensity of anthocyanin colouration
AWNS: weak to medium intensity of anthocyanin colouration, medium in length
LOWER GLUME: very short first beak, small second beak, hairs present on external surface

KERNEL: amber, small, medium in length, narrow, ovate shape, dark colouration with phenol

AGRONOMIC TRAITS: poor winter survival

Origin & Breeding History: 'AB Stampeder' (experimental designations 09P144 and T256) originated from a line nursery introduced to the Alberta Agriculture and Forestry Centre for Crop Development in Lacombe, Alberta in 2009 by the International Maize and Wheat Improvement Centre, a non-profit research and training organization headquartered in Texcoco, Mexico. The line T256 was selected and screened in 2010 in Lacombe, Alberta and subsequently placed in yield trials from 2011 to 2015. Simultaneously, the line was grown in purification nurseries and 100 heads selected for pre-breeder rows. Ninety six of the pre-breeder rows were advanced into breeder plots in 2017 with 94 of the plots bulked to form breeder seed. In 2016, T256 was entered into Coop trials and supported for registration in 2018 by the Prairie Recommending Committee for Wheat, Rye and Triticale. Selection criteria for 'AB Stampeder' was based on grain yield and quality, test weight, 1000 kernel weight, lodging resistance, maturity and disease resistances.

Tests & Trials: The comparative trials for 'AB Stampeder' were conducted during the 2020 and 2021 growing seasons at Olds College Field Crop Development Centre in Lacombe, Alberta. The trial was arranged in a RCB design with 3 replicates. Each plot consisted of 8 rows with a row length of 2.5 metres. There was 0.14 metre inter row spacing with 0.61 metres between the plots. The seeding density was 300 seeds per squared metre resulting in approximately 2500 plants per variety. Measured characteristics were based on 30 measurements per variety per year. Mean differences were significant at the 5% probability level based on a paired Student's t-test.

Comparison tables for 'AB Stampeder' with reference varieties 'Bunker' and 'Taza'

Flag leaf length (cm)

Flag leaf width (mm)

Plant height (including awns) (cm)

Spike length (excluding awns) (cm)

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Triticale: 'AB Stampeder' (bottom left) with reference varieties 'Taza' (top right) and 'Bunker' (bottom right)

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Triticale: 'AB Stampeder' (centre) with reference varieties 'Bunker' (left) and 'Taza' (right)

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Triticale: 'AB Stampeder' (centre) with reference varieties 'Bunker' (left) and 'Taza' (right)