CDC Armstrong
| Denomination: | 'CDC Armstrong' |
|---|---|
| Botanical Name: | Hordeum vulgare |
| Applicant/Holder: |
University of Saskatchewan Crop Development Centre 4D36 Agriculture Building, 51 Campus Drive Saskatoon, Saskatchewan S7N 5A8 Canada |
| Breeder: |
Aaron Beattie, University of Saskatchewan, Saskatoon, Saskatchewan |
| Application Date: | 2024-04-30 |
| Provisional Protection: | 2024-04-30 |
| Application Number: | 24-11675 |
Variety Description
Varieties used for comparison: 'CDC Clear' and 'AAC Synergy'
Summary: At booting, the flag leaf of ‘CDC Armstrong' is longer than that of ‘AAC Synergy' and narrower than that of ‘CDC Clear'. Spike emergence for ‘CDC Armstrong' occurs mid-season, whereas it occurs late in the season for ‘CDC Clear'. At ripening, the plants, including the awns, of ‘CDC Armstrong' are shorter than the plants of ‘CDC Clear'. The spike, excluding the awns, of ‘CDC Armstrong' is shorter than the spike of ‘CDC Clear'.
Description:
YOUNG PLANT: semi-erect to indeterminate growth habit at tillering, absent or very sparse pubescence on lower leaf sheaths
PLANT: two row, spring type, malting barley, s medium frequency of plants with recurved flag leaves
FLAG LEAF (AT BOOTING): very weak pubescence on blade
FLAG LEAF SHEATH: strong glaucosity, very weak pubescence
AURICLES: weak intensity of anthocyanin colouration, sparse pubescence on margins
SPIKE: mid-season emergence, strong glaucosity, semi-erect attitude, parallel shape, lax density, parallel to weakly divergent to divergent sterile spikelet attitude, glume and awn of median spikelet are equal to length of grain
LEMMA AWNS: very weak to weak intensity of anthocyanin colouration of the tips, longer than length of spike, rough spiculations on margins
FIRST SEGMENT OF RACHIS: short to medium length, medium degree of curvature
KERNEL: absent or very weak intensity of anthocyanin colouration of nerves of the lemma at the end of anthesis, whitish aleurone layer, long rachilla hairs, husk absent, medium to strong spiculation of inner lateral nerves of dorsal side of lemma, absent hairiness of ventral furrow, clasping disposition of lodicules, horseshoe and incomplete horseshoe shape of basal markings, medium length, narrow to medium width
AGRONOMIC CHARACTERISTICS: poor to fair resistance to lodging, good resistance to shattering, good tolerance to straw breakage, fair to good tolerance to drought, good malting quality
Origin & Breeding History: ‘CDC Armstrong' (experimental designations HB20351 and SH170319) originated from a cross conducted between the varieties ‘CDC Clear' and ‘AAC Synergy' made under a glass greenhouse at the Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan in the summer of 2013. Between 2013 and 2016, further breeding work (F1 to F5) was carried out using a modified bulk breeding method, with work split between Saskatoon and a winter nursery in New Zealand. Further yield tests were conducted from 2017 to 2022. Selection criteria was based on seed characteristics, plant height, lodging resistance, threshability, yield, protein content, wort beta-glucan content, and viscosity. Breeder seed of ‘CDC Armstrong' was produced during the 2023 growing season.
Tests & Trials: The comparative trials for 'CDC Armstrong' were conducted at the Crop Development Centre of the University of Saskatchewan, Saskatoon, Saskatchewan during 2023 and 2024 growing seasons. There were 4 replicates per variety arranged in an RCB design for each growing season. Plots were 4.5 square metres and consisted of 5 rows with a row length of 3.7 metres with 0.2 metres between rows. The seeding density was 215 seeds per square metre. Measured characteristics were based on a minimum of 24 measurements per variety per year. The mean differences were significant at the 5% probability level based on LSD values.
Comparison tables for 'CDC Armstrong' with reference varieties 'CDC Clear' and 'AAC Synergy'
Plant height, including awns (cm)
| 'CDC Armstrong' | 'CDC Clear' | 'AAC Synergy' | |
|---|---|---|---|
| mean (2023) (LSD=1.6) | 87.5 | 92.7 | 88.7 |
| std. deviation (2023) | 5.6 | 6.6 | 4.9 |
| mean (2024) (LSD=2.6) | 102.1 | 109.2 | 101.1 |
| std. deviation (2024) | 6.7 | 5.1 | 4.4 |
Flag leaf length (cm)
| 'CDC Armstrong' | 'CDC Clear' | 'AAC Synergy' | |
|---|---|---|---|
| mean (2023) (LSD=0.8) | 15.7 | 16.4 | 14.4 |
| std. deviation (2023) | 2.2 | 2.1 | 1.5 |
| mean (2024) (LSD=1.2) | 18.5 | 20.0 | 15.2 |
| std. deviation (2024) | 1.9 | 2.2 | 2.0 |
Flag leaf width (mm)
| 'CDC Armstrong' | 'CDC Clear' | 'AAC Synergy' | |
|---|---|---|---|
| mean (2023) (LSD=0.5) | 9.9 | 11.6 | 9.8 |
| std. deviation (2023) | 1.4 | 1.2 | 1.1 |
| mean (2024) (LSD=0.7) | 13.7 | 15.9 | 12.6 |
| std. deviation (2024) | 1.5 | 1.0 | 1.2 |
Spike length, excluding awns (cm)
| 'CDC Armstrong' | 'CDC Clear' | 'AAC Synergy' | |
|---|---|---|---|
| mean (2023) (LSD=0.3) | 8.7 | 11.2 | 8.6 |
| std. deviation (2023) | 0.5 | 0.5 | 0.6 |
| mean (2024) (LSD=0.4) | 8.8 | 10.6 | 8.0 |
| std. deviation (2024) | 0.6 | 0.8 | 0.5 |
Click on image for larger view
Barley: 'CDC Armstrong' (centre) with reference varieties 'CDC Clear' (left) and 'AAC Synergy' (right)
Click on image for larger view
Barley: 'CDC Armstrong' (centre) with reference varieties 'CDC Clear' (left) and 'AAC Synergy' (right)
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