V38
| Denomination: | 'V38' |
|---|---|
| Botanical Name: | Thuja occidentalis |
| Applicant/Holder: |
Brodeur, Alain 1469, Rg 6 Ste-Cécile-de-Milton, Quebec J0E 2C0 Canada |
| Breeder: |
Alain Brodeur, Ste-Cécile-de-Milton, Quebec |
| Agent in Canada: |
IQDHO 3230 rue sicotte E-307 Sainte-Hyacinthe, Quebec J2S 2M2 Canada Tel: 450-778-6514 |
| Application Date: | 2023-03-23 |
| Provisional Protection:: | 2023-03-23 |
| Application Number: | 23-11250 |
Variety Description
Varieties used for comparison: 'Nigra', 'V32' and 'A112'
Summary: During active growth, 'V38' has a broad columnar plant habit while those of the reference varieties have an ovoid plant habit. The plant growth rate for 'V38' is faster than that of 'V32 and 'A112'. The branches of 'V38' have a semi-erect attitude while those of 'A112' have an erect attitude. The branch of 'V38' has a greater number of branchlets of the first order than those of the reference varieties. The branchlet of the first order of 'V38' is a twisted type while that of 'Nigra' is a flat type. The branchlets of the penultimate and last order of 'V38' are shorter than the branchlets of the reference varieties and narrower than those of 'V32' and 'A112'. In the summer of the current year, the leaf on the branchlets of the penultimate and last order of 'V38' are dark green while those of 'V32' are light green. In the winter of the current year, the leaf on the branchlets of the penultimate and last order of 'V38' are green brown while the leaf on the branchlets of the penultimate and last order of 'Nigra' and 'A112' are brown green and those of 'V32' are dark green to brown green. In winter, variegation is absent on the branchlets of penultimate and last order for 'V38' while apical variegation is present on those of 'V32' and 'A112'. The leaf of 'V38' has a medium number of prominent glands while that of 'A112' has many prominent glands. The leaf of 'V38' is thicker than the leaf of 'Nigra' and thinner than that of 'A112'. In late summer, the branch of 'V38' has less cones than the branch of 'Nigra'.
Description:
PLANT: broad columnar habit during active growth, fast growth rate, sparse to medium density of branching, semi-erect branch attitude, branches of medium rigidity
BRANCH: many branchlets of first order, medium to large distance between new branchlets on leading shoot, cones present in late summer
BRANCHLET OF FIRST ORDER: twisted type, semi-erect planar spray arrangement
BRANCHLET OF PENULTIMATE AND LAST ORDER: short, narrow, no variegation
LEAF: only scale-shaped type, long, medium width, curved along longitudinal axis, acute tip, medium number of prominent glands, medium thickness, medium glossiness
LEAF ON BRANCHLET OF PENULTIMATE AND LAST ORDER: dark green (RHS 144A) in spring, dark green (RHS 143B) in summer, green brown (RHS 152A) in winter
Origin & Breeding History: The variety 'V38' originated as a natural plant mutation of the variety 'Nigra' discovered in the summer of 2006 in Sainte-Cécile-de-Milton, Québec, Canada. The new variety was selected based on general plant structure, foliage density as well as cone and flower bud production. Asexual reproduction was first conducted in Sainte-Cécile-de-Milton, Québec by stem cuttings in 2007.
Tests & Trials: The comparative trial for 'V38' was conducted in an outdoor field production trial in 2023 in Sainte-Cécile-de-Milton, Québec. The trial included a total of 8 plants of each of the candidate and reference varieties. The plants were situated in rows spaced approximately 90 cm apart with 1 metre spacing between rows. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart. Measured characteristics were based on a minimum of 8 measurements per variety per year. Mean differences were significant at the 5% probability level based on a paired Student`s t-test.
Comparison tables for 'V38' with reference varieties 'Nigra', 'V32' and 'A112'
Plant growth from April 21 to September 26, 2023 (cm)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 53.9 | 55.3 | 47.1 | 46.6 |
| std. deviation | 6.25 | 8.68 | 5.27 | 12.15 |
Number of branchlets of first order per branch (count)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 15.5 | 14.0 | 11.8 | 12.9 |
| std. deviation | 1.75 | 0.50 | 1.19 | 0.69 |
Length of branchlets of penultimate and last order (cm)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 6.9 | 7.6 | 8.3 | 8.2 |
| std. deviation | 0.79 | 0.68 | 0.67 | 0.58 |
Width of branchlets of penultimate and last order (cm)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 3.0 | 2.9 | 3.6 | 3.8 |
| std. deviation | 0.44 | 0.38 | 0.46 | 0.43 |
Main colour of current year leaf on branchlets of penultimate and last order (RHS)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| summer | 143B | 143B | 144B | 144A |
| winter | 152A | 146B | 144A to 146B | 144A |
Leaf thickness (mm)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 0.8 | 0.6 | 0.8 | 1.0 |
| std. deviation | 0.09 | 0.10 | 0.09 | 0.07 |
Number of cones per branch (count)
| 'V38' | 'Nigra' | 'V32' | 'A112' | |
|---|---|---|---|---|
| mean | 0.1 | 6.6 | 0.0 | 0.0 |
| std. deviation | 0.45 | 6.49 | 0.0 | 0.0 |
Click on image for larger view
Cedar: 'V38' (right) with reference varieties 'Nigra' (left), 'A112' (centre left) and 'V32' (centre right)
Click on image for larger view
Cedar: 'V38' (right) with reference varieties 'A112' (left), 'Nigra' (centre left) and 'V32' (centre right)
Click on image for larger view
Cedar: 'V38' (centre left) with reference varieties 'Nigra' (left), 'A112' (centre right) and 'V32' (right)
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