Denomination: 'Emerson'
Botanical Name: Triticum aestivum
Applicant/Holder: Agriculture & Agri-Food Canada, Lethbridge
Lethbridge Research Centre, 5403 - 1 Avenue, South
P.O. Box 3000
Lethbridge, Alberta
T1J 4B1
Breeder: Robert Graf, Agriculture & Agri-Food Canada, Lethbridge, Alberta
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
6000 C&E Trail
Lacombe, Alberta
T4L 1W1
Tel: (403) 782-8126
Application Date: 2011-06-07
Application Number: 11-7301
Grant of Rights Date: 2014-11-19
Certificate Number: 4951
Grant of Rights Termination Date: 2032-11-19

Variety Description

Varieties used for comparison: 'CDC Falcon', 'CDC Raptor' and 'CDC Osprey'

Summary: The flag leaves of 'Emerson' are longer than those of 'CDC Falcon' and 'CDC Raptor'. The frequency of plants with recurved flag leaves on 'Emerson' is high to very high whereas the frequency is medium on 'CDC Falcon' and medium to high on 'CDC Raptor'. At maturity, the plants of 'Emerson' are taller than those of 'CDC Falcon' and shorter than those of 'CDC Osprey'. The spike of 'Emerson' is longer than that of 'CDC Falcon' and 'CDC Raptor'. 'Emerson' is resistant to Fusarium Head Blight (Fusarium graminearum, Fusarium species) whereas 'CDC Falcon' is susceptible to highly susceptible and 'CDC Osprey' is moderately resistant to moderately susceptible.


PLANT: winter type, semi-erect to intermediate growth habit at the 5 to 9 tiller stage, heads emerge early to mid-season, matures mid-season

SEEDLING: absent or very weak intensity of anthocyanin colouration of coleoptile, glabrous lower leaf sheaths and blades

FLAG LEAF: medium length, high to very high frequency of plants with recurved/drooping flag leaves, weak anthocyanin colouration of auricles, medium to strong glaucosity of sheath, glabrous blade and sheath

CULM NECK: weak to medium glaucosity, very slight curvature
STRAW: hollow in cross section, yellow with no anthocyanin colouration at maturity
SPIKE: absent or very weak glaucosity, tapering shape, medium density, yellow at maturity, inclined to nodding attitude at maturity, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: shorter than length of spike, light yellow
LOWER GLUME: long, narrow to medium width, glabrous to very slightly pubescent, medium extent of internal hairs
LOWER GLUME SHOULDER: narrow, oblique shape
LOWER GLUME BEAK: medium length, acuminate

KERNEL: hard red type, medium red colour, brown to black reaction to phenol

AGRONOMIC CHARACTERISTICS: good resistance to shattering, good to very good resistance to lodging, fair to good winter hardiness

QUALITY CHARACTERISTICS: good bread making quality

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

Origin & Breeding History: 'Emerson' (experimental designation W454) is derived from the cross 'McClintock' x 'CDC Osprey' made in 2000 at the Agriculture and Agri-Food Canada Lethbridge Research Centre, Lethbridge, Alberta. The maize hybridization technique was used to produce F1-derived doubled haploid lines in 2001. Initial row evaluation took place in 2003 in which selection based on winter survival, plant type and vigour, straw strength, plant height, protein content, test weight and Sodium Dodecyl Sulfate sedimentation volume. Stem and Leaf Rust resistance was evaluated from 2004 to 2007 in Winnipeg, Manitoba. Based on the resistance to Stem and Leaf Rust in 2004, a line designated LF1313 was evaluated in an irrigated, single replicate preliminary agronomic trial at Lethbridge in 2005. Following pre-registration testing across western Canada, LF1313 was evaluated as W454 in the Western Winter Wheat Cooperative Registration Trial from 2008 to 2010.

Tests & Trials: Tests and trials were conducted in 2012 and 2013 in Lethbridge, Alberta. Plots consisted of 4 rows per plot with a row length of 3.5 metres and a row spacing of 23 cm. There were 4 replicates arranged in a RCB design. Measured characteristics were based on a minimum of 21 measurements per year.

Comparison tables for 'Emerson' with reference varieties 'CDC Falcon', 'CDC Raptor' and 'CDC Osprey'

Flag leaf length (cm)

  'Emerson' 'CDC Falcon' 'CDC Raptor' 'CDC Osprey'
mean 2012 21.1 17.1 18.5 19.6
std. deviation 2012 2.5 1.8 2.7 3.1
mean 2013 25.2 20.5 21.8 23.7
std. deviation 2013 2.6 3.1 3.0 3.1

Plant height at maturity (cm) - excluding awns

  'Emerson' 'CDC Falcon' 'CDC Raptor' 'CDC Osprey'
mean 88 77 88 97

Spike length (mm)

  'Emerson' 'CDC Falcon' 'CDC Raptor' 'CDC Osprey'
mean 2012 98.3 91.4 95.3 93.7
std. deviation 2012 4.0 3.9 6.1 6.7
mean 2013 100.2 93.8 97.6 98.4
std. deviation 2013 6.3 6.4 6.5 7.8

Click on image for larger view
Wheat: 'Emerson' (right) with reference varieties 'CDC Falcon' (left), 'CDC Osprey' (centre left) and 'CDC Raptor' (centre)

Click on image for larger view
Wheat: 'Emerson' (bottom left) with reference varieties 'CDC Osprey' (top left), 'CDC Falcon' (top centre) and 'CDC Raptor' (top right)

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