Aster 'Starshine' Cultivar Breeding for Compact Habit and Mildew Resistance

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Solution Overview

Problem

Existing Aster cultivars lack compact growth habit, attractive ray floret coloration, and tolerance to Powdery Mildew, which limits their performance in pot-type cultivation and garden conditions.

Innovation Solution

The development of the 'Starshine' cultivar of Aster ageratoides, characterized by a compact, sturdy, and freely flowering habit with white ray florets, and tolerance to Powdery Mildew, achieved through open-pollination and subsequent asexual reproduction by vegetative cuttings, resulting in a distinct pot-type Aster with improved garden performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If existing Aster cultivars are used for pot-type cultivation, then they can be grown in containers, but they lack compact growth habit and attractive ray floret coloration

Engineering Contradiction:

Improvecompact growth habitVSAvoidperformance in pot-type cultivation

Core Design Contradiction:

ShapeVSAdaptability or versatility

Solution Approach 1:

The breeding program modified genetic parameters through controlled open-pollination to achieve compact growth habit and attractive white ray floret coloration. The selected cultivar 'Starshine' exhibits significantly reduced plant height and width compared to parent selections, with dense foliage and compact mounding habit that is specifically adapted for container cultivation while maintaining aesthetic appeal

Inventive Principle:

Principle #35Parameter changes

2Reliability

If existing Aster cultivars are used, then they can flower, but they lack tolerance to Powdery Mildew which limits garden performance

Engineering Contradiction:

Improvetolerance to Powdery MildewVSAvoidgarden performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The breeding program converted the harmful effect of Powdery Mildew susceptibility into a beneficial trait by selecting for resistance. Through open-pollination and systematic selection of plants exhibiting tolerance to Powdery Mildew, the new cultivar 'Starshine' was developed with inherent resistance to this common fungal disease, transforming a previously limiting factor into a reliable performance characteristic for garden cultivation

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Adaptability or versatility

If open-pollination is used for breeding, then genetic diversity is achieved, but the unique features may not be stable across generations

Engineering Contradiction:

Improvegenetic diversityVSAvoidstability of unique features

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The breeding program performed preliminary selection and evaluation before finalizing the cultivar. Multiple generations of open-pollination were conducted with systematic selection of plants exhibiting the desired compact habit and white florets. The stability of unique features was confirmed through asexual reproduction by vegetative cuttings, which demonstrated that the selected traits were genetically fixed and reproduced true to type in successive generations

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUSPP19403P2Aster plant named 'Starshine'

Publication Date: 2008.11.04 HOP MARGARETH E C M

AI summary

A new and distinct cultivar of Aster plant named ‘Starshine’, characterized by its uniform, sturdy, upright, outwardly spreading and mounding plant habit; freely flowering habit; daisy-type inflorescences with white-colored ray florets; tolerance to Powdery Mildew; and good garden performance.