CM Isidore


Denomination: 'CM Isidore'
Previously Proposed Denomination: 'B89-6-28-883'
Botanical Name: Triticum aestivum
Applicant/Holder: Agriculture & Agri-Food Canada, Ottawa
Ottawa Research and Development Centre
Room 1093A - 960 Carling Avenue
Ottawa, Ontario
K1A 0C6
Tel: 613-759-1683

University of Guelph
Catalyst Centre
50 Stone Rd E, Ichthyology Building #92
Guelph, Ontario
N1G 2W1
Tel: 519-824-4120; ext 58878
Breeder: Harvey Voldeng, Agriculture & Agri-Food Canada, Ottawa, Ontario
Agent in Canada: University of Guelph
Business Development Office
130 Research Lane, Unit 4
Guelph, Ontario
N1G 5G3
Application Date: 2005-03-24
Application Number: 05-4645
Date Withdrawn: 2008-12-10

Variety Description

Varieties used for comparison: 'Quantum', 'Winfield', 'Superb' and 'Wendel'

Summary: 'CM Isidore' has a more erect growth habit than 'Winfield', 'Superb' and 'Wendel'. 'CM Isidore' matures earlier than 'Winfield', 'Superb' and 'Wendel' and later than 'Quantum'. 'CM Isidore' has a more narrow flag leaf and a shorter spike than the reference varieties. 'CM Isidore' has weaker glaucosity on the lower side of the flag leaf than 'Quantum', 'Superb' and 'Wendel'. The flag leaf auricles of 'CM Isidore' have weaker pubescence than those of 'Quantum' and weaker anthocyanin colouration than those of 'Superb'. Glaucosity of the flag leaf sheath and neck is moderate and weak to moderate, respectively, for 'CM Isidore' while it is strong to very strong for 'Quantum'. At maturity, the attitude of the spikes of 'CM Isidore' is nodding while it is erect or incline for the reference varieties. 'CM Isidore' has weak anthocyanin colouration of the straw while it is absent for the reference varieties.


YOUNG PLANT (4 leaf stage): absent or very weak anthocyanin colouration of coleoptiles, glabrous sheaths, pubescent at base of blades of the lower leaves
PLANT: spring type, erect to semi-erect growth habit, mid-season maturity, low tendency to recurved flag leaves
STEM AT MATURITY: medium pith in cross-section, weak anthocyanin colouration
CULM NECK: weak to medium glaucosity, weak to moderate curvature

FLAG LEAF: dark green, glabrous on upper side, very weak glaucosity on lower side, intermediate between upright and drooping attitude
FLAG LEAF SHEATH: glabrous, medium glaucosity
FLAG LEAF AURICLES: absent or very weak anthocyanin colouration, no pubescence of margins

SPIKE: parallel sided, medium density, nodding attitude at maturity, medium glaucosity, white at maturity
AWNS: medium length, mostly spreading attitude, white
LOWER GLUME: medium width, medium length, glabrous, elevated shoulder, medium width shoulder, straight beak, medium length beak, sparse internal hairs
LEMMA: slightly curved beak, dark green markings on greenish yellow background
KERNEL: hard red type, medium to dark red, small to medium size, medium length, medium width, ovate, rounded cheeks, medium length brush hairs, medium width crease, medium depth crease
GERM: medium size, round


RESISTANCE TO DISEASE: susceptible to Yellow Dwarf and Barley Yellow Dwarf Virus; moderate susceptibility to Powdery Mildew (Erysiphe graminis f.sp. tritici) and Fusarium Head Blight (Fusarium graminearum); moderate resistance to Leaf Rust (Puccinia triticina)

Origin & Breeding History: The wheat variety 'CM Isidore' (experimental designation B89-6-28-883) originated from the cross Roblin/Bluesky///Max/Coteau//Bluesky made by Dr. Jean-Pierre Dubuc of Agriculture and Agri-Food Canada of St-Foy, Quebec in 1989. The breeding technique used was Modified Bulk. From 1997 to 1999, tests were conducted on selected lines in a number of locations including Ridgetown, Centralia, Kemptville and Ottawa in Ontario. Final selection of 'CM Isidore' was made in the F7 and F8 generations based on Fusarium resistance, Barley Yellow Dwarf resistance, kernel cross-section type, seed size, grain density, plant appearance, number of heads produced per unit area, cleanliness of leaves, percent protein, percent moisture, alpha amylase activity and loaf characteristics. In 2000, 'CM Isidore' was tested in 8 locations across Ontario for Fusarium Head Blight susceptibility and baking quality.

Tests & Trials: The tests and trials for 'CM Isidore' were conducted during the summers of 2005 and 2006 in Ridgetown, Ontario. Plots consisted of 6 rows, 4 metres in length at 15 cm row spacing with 40 cm between plots. There were 4 replicates arranged in a Random Complete Block Design.

Comparison tables for 'CM Isidore' with reference varieties 'Quantum', 'Winfield', 'Superb' and 'Wendel'

Flag leaf width (mm)

  'CM Isidore' 'Quantum' 'Winfield' 'Superb' 'Wendel'
mean 11.8 12.9 14.2 16.1 14.2
std. deviation 0.9 0.7 1.2 1.7 1.0

Days to heading

  'CM Isidore' 'Quantum' 'Winfield' 'Superb' 'Wendel'
mean 2005 162 163 168 165 167
mean 2006 159 158 165 161 165

Height at heading (including awns) (cm)

  'CM Isidore' 'Quantum' 'Winfield' 'Superb' 'Wendel'
mean 103 99 107 93 81
std. deviation 1.0 2.2 3.5 3.4 5.8

Kernel test weight (kg/hectolitre)

  'CM Isidore' 'Quantum' 'Winfield' 'Superb' 'Wendel'
2005 78.2 75.8 74.8 76.4 74.2
2006 77.8 75.8 74.2 74.4 72.0

Click on image for larger view
CM Isidore
Wheat: 'CM Isidore' (centre left) with reference varieties 'Quantum' (left), 'Superb' (centre), 'Windfield' (centre right) and 'Wendel' (right)

Click on image for larger view
CM Isidore
Wheat: 'CM Isidore' (centre right) with reference varieties 'Quantum' (right), 'Superb' (centre), 'Windfield' (centre left) and 'Wendel' (left)

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