Cornus SMNCSBD Cultivar Propagation and Trait Stability
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Solution Overview
Problem
There is a need for a new and distinct cultivar of Cornus stolonifera that exhibits unique characteristics such as compact growth habit, vigorous growth, medium green-colored leaves, white flowers, and white to light yellow green-colored fruits, which are stable and reproduce true to type through asexual reproduction.
Innovation Solution
The new Cornus cultivar 'SMNCSBD' is developed through open-pollination of Cornus stolonifera 'Flaviramea' and an unknown selection of Cornus stolonifera, displaying distinct traits like compact and vigorous growth, white flowers, and light yellow green fruits, which are reproduced via softwood stem cuttings and are tolerant to various environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If open-pollination is used to create new cultivars, then genetic diversity and unique characteristics can be achieved, but the stability of traits through asexual reproduction cannot be guaranteed
Solution Approach 1:
The patent uses softwood stem cuttings to create copies of the selected plant that reproduce the unique traits true to type. This copying method allows the stable propagation of the compact growth habit, white flowers, and light yellow green fruits without the genetic variability introduced by open-pollination.
Solution Approach 2:
The patent changes the propagation parameter from open-pollination (sexual reproduction) to softwood stem cuttings (asexual reproduction). This parameter change ensures that the unique characteristics developed through selection are maintained stably in subsequent generations.
2Adaptability or versatility
If plants are grown under varying environmental conditions, then adaptability is demonstrated, but phenotypic variation occurs without genotypic change
Solution Approach 1:
The patent observes and selects for specific local qualities (compact growth habit, white flowers, light yellow green fruits) that distinguish the cultivar. These local qualities are maintained through asexual reproduction while the plant continues to adapt to varying environmental conditions.
Solution Approach 2:
Instead of allowing environmental conditions to cause phenotypic variation, the patent uses asexual reproduction to fix the phenotype while maintaining adaptability. The inversion is in reversing the causal relationship: rather than environment → phenotype variation, we have genotype (through asexual reproduction) → consistent phenotype while adapting to environment.
3Volume of moving object
If compact growth habit is selected, then space efficiency is improved, but vigor and growth rate may be reduced
Solution Approach 1:
The patent changes the growth parameters through selective propagation to achieve a compact growth habit while maintaining vigor. The softwood stem cutting method allows retention of the compact form factor while preserving the productive growth characteristics through clonal propagation.
Data Source
AI summary
A new and distinct cultivar of Cornus plant named ‘SMNCSBD’, characterized by its compact, upright to outwardly spreading and sprawling plant habit; vigorous growth habit; medium green-colored leaves; numerous single-type flowers that are white in color; white to light yellow green-colored fruits; and good garden performance.