Hosta Cultivar Sun Tolerance and Cold Adaptation

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Solution Overview

Problem

Existing Hosta varieties are not well-suited for full sun conditions and have high cold requirements, limiting their performance and adaptability in various environmental settings.

Innovation Solution

The cultivar 'HOST SUN 08' is a naturally occurring mutation with improved sun tolerance and lower cold requirements, characterized by bright green leaves with wide, creamy yellow-white margins, and is propagated through division and tissue culture, maintaining stability across generations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If existing Hosta varieties are used, then they can grow in shaded conditions, but they cannot perform well in full sun conditions

Engineering Contradiction:
Improvesun toleranceVSAvoidperformance consistency
Core Design Contradiction:
Illumination intensityVSReliability

Solution Approach 1:

The patent describes a naturally occurring chimeral mutation that has altered the physiological parameters of the Hosta plant, enabling it to tolerate full sun conditions. The mutation changed the plant's genetic composition to allow better performance in higher illumination intensities while maintaining other desirable traits like foliage color and plant form.

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If existing Hosta varieties are used, then they can maintain green foliage, but they have high cold requirements that limit adaptability

Engineering Contradiction:
Improveenvironmental adaptabilityVSAvoidcold requirement
Core Design Contradiction:
Adaptability or versatilityVSTemperature

Solution Approach 1:

The chimeral mutation in this Hosta variety has fundamentally changed the plant's temperature tolerance parameters. The new cultivar exhibits significantly reduced cold requirements compared to parent varieties, allowing it to thrive in warmer climates and environments where traditional Hostas would struggle, thereby expanding its environmental adaptability.

Inventive Principle:
Principle #35Parameter changes

3Illumination intensity

If Hosta varieties with broad white margins are bred, then aesthetic appeal is improved, but sun tolerance is reduced

Engineering Contradiction:
Improvesun toleranceVSAvoidfoliage margin width
Core Design Contradiction:
Illumination intensityVSShape

Solution Approach 1:

The mutation has simultaneously optimized multiple parameters: it has increased sun tolerance while also enhancing the foliage margin characteristics. The result is broader, more prominent creamy yellow-white margins that are more substantial than in parent varieties, while the plant maintains superior sun tolerance - a combination that would be difficult to achieve through traditional breeding alone.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUSPP21730P2Hosta plant named `Host Sun 08`
Publication Date: 2011.02.22 CHODYLA BERNARD
  • USPP21730P2 patent drawing

AI summary

A new and distinct Hosta plant cultivar is disclosed, characterized by a better performance in the sun than other Hosta varieties known to the inventor; large, oval-shaped leaves; very low cold requirements and bright green leaves with wide, creamy yellow-white margins.