CDC Carbide

Wheat

Denomination: 'CDC Carbide'
Previously Proposed Denomination: 'DT574'
Botanical Name: Triticum turgidum subsp. durum
Applicant/Holder: University of Saskatchewan
Crop Development Centre
4D36 Agriculture Building, 51 Campus Drive
Saskatoon, Saskatchewan
S7N 5A8
Canada
Breeder: Curtis Pozniak, University of Saskatchewan, Crop Development Centre, Saskatoon, Saskatchewan
Agent in Canada: Crop Production Services (Canada) Inc.
P.O.Box 5234
High River, Alberta
T1V 1M4
Canada
Tel: 403-336-4826
Application Date: 2014-05-16
Application Number: 14-8319

Variety Description

Varieties used for comparison: 'AAC Marchwell', 'CDC Verona', 'Strongfield' and 'AC Avonlea'

Summary: The frequency of plants with recurved flag leaves is low to medium for 'CDC Carbide' whereas it is high for 'CDC Verona' and high to very high for 'AC Avonlea'. The flag leaves of 'CDC Carbide' are shorter and narrower than those of 'CDC Verona' and 'Strongfield'. The glaucosity of the culm of 'CDC Carbide' is weak whereas it is medium for 'Strongfield' and 'AC Avonlea'. The curvature of the culm of 'CDC Carbide' is medium whereas it is weak for the reference varieties. The spike length of 'CDC Carbide' is shorter than that of 'CDC Verona'. The shoulder shape of the lower glume of 'CDC Carbide' is straight whereas it is very slightly sloping for 'AAC Marchwell', elevated for 'CDC Verona' and 'AC Avonlea' and sloping for 'Strongfield'. The beak of the lower glume of 'CDC Carbide' is very slightly curved whereas it is slightly to moderately curved for the reference varieties.

Description:

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

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

FLAG LEAF: low to medium frequency of plants with recurved/drooping flag leaves, very weak intensity of anthocyanin colouration of auricles, medium glaucosity of sheath, glaucosity absent on lower side of leaf blade, glabrous blade and sheath

CULM NECK: weak glaucosity, medium degree of curvature
STRAW: thin pith in cross-section, very weak anthocyanin colouration at maturity, yellow

SPIKE: absent or very weak glaucosity, parallel sided shape in profile, medium to dense, white at maturity, erect attitude, medium to dense hairiness of convex surface of apical rachis segment
AWNS: longer than length of spike, white, weak spreading
LOWER GLUME: medium length and width, very sparse pubescence, sparse extent of internal hairs
LOWER GLUME SHOULDER: narrow, straight
LOWER GLUME BEAK: medium length, very slightly curved
LOWEST LEMMA: very slightly curved beak shape

KERNEL: amber, medium size, medium length and width, elliptical shape, rounded to angular cheek, short brush hairs, mid-wide to wide crease, mid-deep crease
GERM: medium size, oval shape

DISEASE REACTIONS: resistant to Stem Rust (Puccinia graminis f. sp. tritici), Leaf Rust (Puccinia triticina) and Common Bunt (Tilletia tritici and Tilletia laevis); moderately resistant to moderately susceptible to Loose Smut (Ustilago tritici); susceptible to Fusarium Head Blight (Fusarium graminearum, Fusarium species)

Origin & Breeding History: 'CDC Carbide' (experimental designations 'DT574' and 'D05X.81.025') is the result of the cross 'Strongfield' / 'DT780' made in the summer of 2005 at the Crop Development Centre of the University of Saskatchewan. The F1 was increased at a contra-season in New Zealand and the F2 was planted in Saskatchewan. Over 300 single spikes were selected from F2 plants and advanced for two generations using single seed descent. In 2007, F4:5 rows were planted in Saskatchewan and one line, 'D05X.81.025' was selected for plant height, maturity and straw strength and was grown in un-replicated F6 yield trials in 2008 in Saskatoon. In 2009, the F7 was evaluated for agronomic traits in replicated yield trials at various locations in Saskatchewan and in disease resistance trials in Saskatoon and Carman, Manitoba. In 2010, 'D05X.81.025' was further evaluated in various locations in Saskatchewan and Alberta in the Durum Wheat B-test. It was evaluated as 'DT574' in the Durum Wheat co-operative tests from 2011 to 2013. Selection criteria were yield potential, plant maturity, plant height, disease resistance, grain quality and end use functionality.

Tests & Trials: The comparative tests and trials of 'CDC Carbide' were conducted during the 2014 and 2015 growing seasons at the Crop Science Research Farm, University of Saskatchewan, Saskatoon, Saskatchewan. A two replicate, randomised complete block design was planted with each replicate consisting of 5 rows. The plot size was 4.5 square metres with a density of 230 plants per square metre. Measured characteristics are based on 20 measurements per variety. Mean differences are significant at the 5% probability level based on a paired Student's T-test.


Comparison tables for 'CDC Carbide' with reference varieties 'AAC Marchwell', 'CDC Verona', 'Strongfield' and 'AC Avonlea'

Flag leaf length (cm)

  'CDC Carbide' 'AAC Marchwell' 'CDC Verona' 'Strongfield' 'AC Avonlea'
mean 2014 22.7 21.1 28.6 24.4 25.2
std. deviation 2014 2.2 2.8 2.5 2.7 3.8
mean 2015 15.3 16.9 18.4 17.9 14.9
std. deviation 2015 1.8 2.0 2.0 2.2 1.6

Flag leaf width (mm)

  'CDC Carbide' 'AAC Marchwell' 'CDC Verona' 'Strongfield' 'AC Avonlea'
mean 2014 13.4 13.6 14.2 14.3 14.1
std. deviation 2014 1.1 1.5 1.0 0.9 1.4
mean 2015 11.6 12.6 12.6 12.4 11.2
std. deviation 2015 0.9 1.0 0.8 1.0 0.8

Spike length, excluding awns (cm)

  'CDC Carbide' 'AAC Marchwell' 'CDC Verona' 'Strongfield' 'AC Avonlea'
mean 2014 6.0 6.1 6.8 6.2 6.6
std. deviation 2014 0.4 0.4 0.4 0.4 0.4
mean 2015 6.8 6.3 7.2 6.1 6.5
std. deviation 2015 0.5 0.6 0.4 0.6 0.4

Click on image for larger view
CDC Carbide
Wheat: 'CDC Carbide' (left) with reference varieties 'AAC Marchwell' (centre left), 'CDC Verona' (centre), 'Strongfield' (centre right) and 'AC Avonlea' (right)

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