CDC Ortona
| Denomination: | 'CDC Ortona' |
|---|---|
| Previously Proposed Denomination: | 'PT596' |
| Botanical Name: | Triticum aestivum |
| Applicant/Holder: |
University of Saskatchewan Crop Development Centre 4D36 Agriculture Building, 51 Campus Drive Saskatoon, Saskatchewan S7N 5A8 Canada |
| Breeder: |
Pierre Hucl, University of Saskatchewan, Saskatoon, Saskatchewan |
| Application Date: | 2018-04-03 |
| Provisional Protection:: | 2018-04-03 |
| Application Number: | 18-9414 |
| Grant of Rights Date: | 2022-05-02 |
| Certificate Number: | 6567 |
| Grant of Rights Termination Date: | 2042-05-02 |
Variety Description
Varieties used for comparison: 'CDC Plentiful', 'CDC Stanley' and 'Thorsby'
Summary: At booting, the flag leaf of 'CDC Ortona' is longer and narrower than that of 'CDC Plentiful' and narrower than that of 'CDC Stanley'. The plants of 'CDC Ortona' are shorter than the plants of 'CDC Plentiful' and 'Thorsby'. 'CDC Ortona' has a longer spike than that of 'CDC Plentiful'. The hairiness on the convex surface of the apical rachis segment of 'CDC Ortona' is dense whereas it is very dense on that of 'CDC Plentiful' and 'Thorsby'.
Description:
PLANT: spring type, common wheat, erect growth habit at 5 to 9 tiller stage, medium frequency of plants with recurved flag leaves, heads mid-season, matures mid-season
SEEDLING (4 LEAF STAGE): absent or very weak intensity of anthocyanin colouration of coleoptile, glabrous sheath and blade of lower leaves
FLAG LEAF: very weak to weak intensity of anthocyanin colouration of auricles, medium to strong glaucosity of sheath, glabrous blade and sheath
CULM: strong glaucosity, straight neck
STRAW: slight to medium pith in cross-section, anthocyanin colouration absent at maturity
SPIKE: strong glaucosity at heading, tapering shape in profile, medium length, medium density, yellow at maturity, erect attitude, dense hairiness of convex surface of apical rachis segment
AWNS: tip awnlets present, shorter than spike, white at maturity
LOWER GLUME: medium length and width, glabrous, sparse extent of internal hair
LOWER GLUME SHOULDER: medium width, straight
LOWER GLUME BEAK: short, slightly curved
LOWEST LEMMA: moderately curved beak
KERNEL: hard red, medium red, medium size, medium length and width, oval shape, rounded cheek, medium length brush hairs, medium width and depth of crease
GERM: medium size
DISEASE REACTIONS : resistant to Leaf rust (Puccinia recondita), Stem rust (Puccinia graminis f. sp. tritici) and Stripe rust (Puccinia striiformis); moderately resistant to moderately susceptible to Fusarium head blight (Fusarium graminearum, Fusarium species) and susceptible to Common bunt (Tilletia caries, Tilletia foetida).
Origin & Breeding History: 'CDC Ortona' (experimental designations 'PT596' and W12769) originated from the initial cross between 'CDC Stanley' and an experimental line, BW876, made during the summer of 2007, which was backcrossed to 'CDC Stanley' in the fall of 2007 at the Crop Development Centre, Saskatoon, Saskatchewan. In 2008, the F1 generation was grown in the field in Saskatoon and the F2 generation was bulked in a winter nursery in Leeston, New Zealand. In 2009, the F3 generation was grown in a space-seeded nursery in Saskatoon. In 2010 and 2011, seed from single-plant selections based on plant type, straw strength and leaf and stem rust reactions, were grown out as F4 and F5 hills, respectively. F6 seed was bulked from a single F5 hill and entered into a replicated yield trial nursery in Saskatoon in 2012. 'PT596' was evaluated under the experimental code W12769 in preliminary yield trials at three sites in Saskatchewan and a single site in Manitoba in 2013, in the Western Bread Wheat B Test in 2014 and subsequently evaluated in the Parkland Wheat Cooperative Test from 2015 to 2017.
Tests & Trials: The comparative trials for 'CDC Ortona' were conducted at the University of Saskatchewan during the 2018 and 2019 growing seasons. There were 4 replicates arranged in an RCB Design. Plots were 3.6 metres long by 1.2 metres wide. Each plot consisted of five rows and 1400 seeds per plot. Measured characteristics were based on 20 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on a LSD values. Disease ratings for 'CDC Ortona' were provided through the Disease Evaluation team of the Prairie Recommending Committee for Wheat, Rye and Triticale and Prairie Grain Development Committee from trials conducted from 2015 to 2017.
Comparison tables for 'CDC Ortona' with reference varieties 'CDC Plentiful', 'CDC Stanley' and 'Thorsby'
Flag leaf length (cm)
| 'CDC Ortona' | 'CDC Plentiful' | 'CDC Stanley' | 'Thorsby' | |
|---|---|---|---|---|
| mean 2018 (LSD=1.56) | 19.0 | 17.1 | 19.2 | 17.5 |
| std. deviation 2018 | 2.4 | 1.4 | 2.6 | 3.3 |
| mean 2019 (LSD=1.69) | 24.5 | 20.9 | 22.5 | 22.7 |
| std. deviation 2019 | 3.1 | 2.4 | 2.9 | 2.1 |
Flag leaf width (mm)
| 'CDC Ortona' | 'CDC Plentiful' | 'CDC Stanley' | 'Thorsby' | |
|---|---|---|---|---|
| mean 2018 (LSD=0.79) | 12.4 | 15.8 | 13.8 | 12.9 |
| std. deviation 2018 | 1.7 | 1.1 | 1.1 | 1.0 |
| mean 2019 (LSD=0.76) | 12.6 | 17.8 | 14.2 | 13.9 |
| std. deviation 2019 | 0.9 | 1.5 | 1.2 | 1.0 |
Plant height at maturity (stem plus spike, including awns) (cm)
| 'CDC Ortona' | 'CDC Plentiful' | 'CDC Stanley' | 'Thorsby' | |
|---|---|---|---|---|
| mean 2018 (LSD=1.48) | 75.7 | 80.9 | 76.5 | 81.6 |
| std. deviation 2018 | 1.6 | 2.0 | 2.9 | 2.7 |
| mean 2019 (LSD=2.25) | 89.9 | 92.5 | 93.5 | 96.7 |
| std. deviation 2019 | 3.3 | 3.9 | 3.2 | 3.80 |
Spike length (excluding awns) (mm)
| 'CDC Ortona' | 'CDC Plentiful' | 'CDC Stanley' | 'Thorsby' | |
|---|---|---|---|---|
| mean 2018 (LSD=2.94) | 84.9 | 77.1 | 83.3 | 88.7 |
| std. deviation 2018 | 4.8 | 3.1 | 4.7 | 5.7 |
| mean 2019 (LSD=4.59) | 91.9 | 73.0 | 89.9 | 92.2 |
| std. deviation 2019 | 6.3 | 5.5 | 9.2 | 7.6 |
Click on image for larger view
Wheat: 'CDC Ortona' (left) with reference varieties 'CDC Plentiful' (centre left), 'Thorsby' (centre right) and 'CDC Stanley' (right)
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