Dendranthema Icicle Igloo Uniform Mounding and Winter Hardiness
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Solution Overview
Problem
There is a need for new perennial garden-type Dendranthema plants with uniformly mounding habit, desirable inflorescence forms, attractive floret colors, and good winter hardiness, as existing varieties may lack uniformity and winter hardiness.
Innovation Solution
The development of 'Icicle Igloo', a new Dendranthema plant resulting from open-pollination, characterized by an upright, spreading, and uniformly mounded habit, freely branching with dense and full plant form, white-colored ray florets, and natural season flowering, exhibiting good garden performance and winter hardiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing Dendranthema varieties are used, then garden performance is maintained, but uniformity of plant habit and winter hardiness are insufficient
Solution Approach 1:
The patent applies parameter changes by selecting and propagating plants with specific phenotypic characteristics (uniformly mounding habit, upright growth pattern, dense foliage) that differ from conventional varieties. Through controlled asexual reproduction by vegetative cuttings, the plant maintains stable genetic parameters while achieving improved uniformity and winter hardiness.
Solution Approach 2:
The patent uses asexual reproduction through vegetative cuttings to create copies of the selected plant that are genetically identical and true-to-type. This copying method ensures that the improved traits of uniformity and winter hardiness are maintained consistently across multiple plants without the variability introduced by sexual reproduction.
2Adaptability or versatility
If open-pollination is used to create new varieties, then genetic diversity is increased, but consistency of traits across generations is reduced
Solution Approach 1:
The patent employs asexual reproduction by vegetative cuttings to produce genetically identical copies of the selected plant. This method maintains trait consistency across generations while the initial open-pollination process introduced the desired genetic diversity and novel characteristics.
Solution Approach 2:
The breeding program is divided into distinct phases: open-pollination to generate genetic diversity and novel traits, followed by selection of superior individuals, and then asexual reproduction to propagate consistent traits. This segmentation allows each phase to optimize for different objectives.
3Stability of the object's composition
If vegetative cuttings are used for propagation, then true-to-type reproduction is achieved, but propagation time is extended
Solution Approach 1:
The patent uses vegetative cuttings to create true-to-type reproductions of the selected plant. While this method does require time for root development and plant establishment, it ensures genetic consistency and fidelity to the parent plant's superior traits.
Data Source
AI summary
A new and distinct cultivar of Dendranthema plant named ‘Icicle Igloo’, characterized by its upright, outwardly spreading and uniformly mounded plant habit; freely branching habit; dense and full plant form; uniform and freely flowering habit; daisy-type inflorescences; white-colored ray florets; and good garden performance and winter hardiness.