Penstemon Dopensprinig Cultivar Breeding for Dark Purple Flowers

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Solution Overview

Problem

There is a need for new Penstemon plants with attractive flower color and improved branching and flowering characteristics that are not met by existing cultivars like Penstemon schmidel 'Marble Riding Hood'.

Innovation Solution

A new cultivar 'Dopensprinig' of Penstemon barbatus with dark purple flowers, vigorous growth, and a freely branching habit is developed through open-pollination and asexual reproduction by terminal vegetative cuttings, offering enhanced garden performance and longer flowering periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If existing cultivars like Penstemon schmidel 'Marble Riding Hood' are used, then they provide flowering characteristics, but they lack attractive dark purple flower color and sufficient branching

Engineering Contradiction:

Improveflower color attractivenessVSAvoidbranching habit

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The breeding program changed the genetic parameters of Penstemon barbatus through controlled open-pollination to produce a cultivar with dark purple flower color (a quantitative change in pigment concentration) and freely branching habit (a qualitative change in growth architecture). The new cultivar 'Dopensprinig' exhibits these altered parameters that were not present in the parent cultivars.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If open-pollination breeding is used to create new Penstemon plants, then new flower colors and branching habits can be achieved, but the stability and true-to-type reproduction must be verified

Engineering Contradiction:

Improveflower color varietyVSAvoidgenetic stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

Before commercial propagation, the inventor performed preliminary verification by taking terminal vegetative cuttings from the selected plant and observing that the unique features were stable and reproduced true to type in successive generations. This preliminary asexual propagation step confirmed genetic stability before the cultivar was formally established.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If Penstemon plants are bred for vigorous growth and rapid growth rate, then garden performance is improved, but the flowering period duration must be maintained

Engineering Contradiction:

Improvegrowth rateVSAvoidflowering period

Core Design Contradiction:

ProductivityVSDuration of action of moving object

Solution Approach 1:

The new cultivar exhibits changed growth parameters with vigorous growth habit and rapid growth rate, while simultaneously maintaining the flowering duration parameter. The plant achieves both high productivity in terms of growth speed and sufficient duration of flowering action, representing a favorable combination of these previously potentially conflicting parameters.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP34875P2<i>Penstemon </i>plant named ‘Dopensprinig’

Publication Date: 2022.12.27 DUEMMEN GROUP BV

AI summary

A new and distinct cultivar of Penstemon plant named ‘Dopensprinig’, characterized by its upright plant habit; vigorous growth habit and rapid growth rate; freely branching habit; freely flowering habit; long flowering period; relatively large dark purple-colored flowers; and good garden performance.