Thuja TPMTF Cultivar Heat Tolerance and Narrow Growth
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Solution Overview
Problem
There is a need for a new cultivar of Thuja plicata x standishii that exhibits unique characteristics such as dark green foliage, narrow width, upright branch structure, and heat tolerance, which are not consistently met by existing varieties.
Innovation Solution
The cultivar 'TPMTF' was discovered and propagated, showcasing stable traits like dark green foliage, narrow width, close bud set, dense canopy, and heat tolerance, distinguishing it from parent and commercial varieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a Thuja cultivar is bred for rapid growth, then productivity is improved, but the plant width becomes excessive and loses the narrow aesthetic appeal
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a cultivar with specific genetic parameters that inherently limit lateral growth while maintaining vertical growth potential. The 'TPMTF' cultivar was identified through controlled propagation and selection processes that stabilized narrow width (about 50% of typical Thuja plicata x standishii) as a heritable trait, resolving the contradiction between growth rate and plant width by changing the genetic parameters of the plant.
2Quantity of substance
If a Thuja cultivar is bred for dense foliage, then the aesthetic quality is improved, but the growth rate decreases
Solution Approach 1:
The patent resolves this contradiction through parameter changes in the genetic composition of the cultivar. The 'TPMTF' cultivar exhibits dense foliage (dense canopy, close bud set) as a stable heritable trait while maintaining moderate growth rate. The controlled propagation over at least five generations stabilized these parameters, achieving a balance where dense foliage and moderate growth coexist without the extreme trade-off suggested by the contradiction.
3Adaptability or versatility
If a Thuja cultivar is bred for heat tolerance, then adaptability is improved, but the foliage color may become less vibrant
Solution Approach 1:
The patent applies parameter changes by selecting for specific genetic traits that maintain foliage color vibrancy under heat stress conditions. The 'TPMTF' cultivar was identified and propagated to stabilize both heat tolerance and dark green foliage color as co-occurring heritable traits. The controlled propagation process over at least five generations ensured that the dark green foliage color remains stable even in hot climates, resolving the contradiction between heat tolerance and color vibrancy.
Data Source
AI summary
A new and distinct Thuja cultivar named ‘TPMTF’ is disclosed, characterized by dark green foliage on dense plants with upswept branches. Plants have been observed to tolerate high temperatures in the Southern United States. The new cultivar is a Thuja, suitable for ornamental garden purposes.