RutThu3
| Denomination: | 'RutThu3' |
|---|---|
| Trade name: | Lemon Burst |
| Botanical Name: | Thuja occidentalis |
| Applicant/Holder: |
University of Georgia Research Foundation, Inc. Room 627 - Boyd Graduate Studies Research Center Athens, Georgia 30602-7411 United States of America |
| Breeder: |
John Ruter, University of Georgia Research Foundation, Inc., Athens, United States of America |
| Agent in Canada: |
BioFlora Inc. 38723 Fingal Line R.R. #1 St. Thomas, Ontario N5P 3S5 Canada Tel: 519-317-7511 |
| Application Date: | 2021-11-10 |
| Provisional Protection:: | 2021-11-10 |
| Application Number: | 21-10740 |
Variety Description
Variety used for comparison: 'Yellow Ribbon'
Summary: The plants of 'RutThu3' have dense foliage with many to very many branchlets of the first order whereas those of 'Yellow Ribbon' have medium density foliage with a medium number of branchlets of the first order. The spray of the branchlet of the first order of 'RutThu3' has an erect to semi-erect attitude while that of 'Yellow Ribbon' has a horizontal attitude. The branchlet of the first order is larger than that of 'Yellow Ribbon'. The distance between the new growth on the leading shoot and the branchlets for 'RutThu3' is larger than that of 'Yellow Ribbon'.
Description:
PLANT: globose shape, medium growth speed, dense foliage
BRANCH: erect attitude, medium degree of stiffness
BRANCHLETS OF FIRST ORDER: many to very many, curved type, planar arrangement of spray, erect to semi-erect attitude of spray
LEAF IN SPRING: outer side main colour is yellow to bronze, inner side main colour is green, yellow apical variegation present
LEAF IN SUMMER: outer side main colour is medium yellow (closest to RHS 12B), inner side main colour is dark brown green (closest to RHS 137B), yellow apical variegation present
LEAF IN WINTER: outer side main colour is yellow bronze, inner side main colour is green, yellow apical variegation present
SCALE-SHAPED LEAF: narrow acute tip, prominent glands
Origin & Breeding History: 'RutThu3' originated from an open-pollinated cross that occurred in Tifton, Georgia,
USA in 2013. The cross was between the female parent variety 'Albo-spicata' and an unnamed male parent. The new variety was selected in 2013 based on plant growth habit, foliage colour and health, disease resistance and cold hardiness. Asexual reproduction of 'RutThu3' was first conducted in 2013 in Tifton, Georgia, USA.
Tests & Trials: The comparative trial for 'RutThu3' was conducted in an outdoor irrigated container trial during the
spring of 2023 in St. Thomas, Ontario. The trial included a total of 10 plants each of the candidate and reference variety. All
plants were transplanted into 11.4 litre pots in the summer of 2022. Observations and measurements were taken on August 24, 2023. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test. All colour determinations were made using the 2015 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'RutThu3' with reference variety 'Yellow Ribbon'
Length of branchlet of first order (cm)
| 'RutThu3' | 'Yellow Ribbon' | |
|---|---|---|
| mean | 14.0 | 10.4 |
| std. deviation | 1.78 | 1.14 |
Width of branchlet of first order (cm)
| 'RutThu3' | 'Yellow Ribbon' | |
|---|---|---|
| mean | 7.5 | 5.6 |
| std. deviation | 1.21 | 0.66 |
Distance between new growth on leading shoot and branchlets (cm)
| 'RutThu3' | 'Yellow Ribbon' | |
|---|---|---|
| mean | 2.7 | 1.3 |
| std. deviation | 0.23 | 0.29 |
Click on image for larger view
Cedar: 'RutThu3' (left) with reference variety 'Yellow Ribbon' (right)
Click on image for larger view
Cedar: 'RutThu3' (left) with reference variety 'Yellow Ribbon' (right)
Click on image for larger view
Cedar: 'RutThu3' (left) with reference variety 'Yellow Ribbon' (right)
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