Dragon Fruit DF14 Variety Canker Tolerance and Appearance

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Solution Overview

Problem

Current varieties of Hylocereus undatus lack attractive fruit appearance, good eating quality, and tolerance to canker disease, limiting their potential in the market.

Innovation Solution

The development of the 'DF14' variety, resulting from a controlled cross between 'RF' and 'LD5', which exhibits medium-sized fruits with white flesh, pink stripes, dark pink to red skin, and resistance to Neoscytalidium dimidiatum canker, characterized by stable traits through asexual and in vitro propagation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If current varieties of Hylocereus undatus are used, then cultivation is maintained, but fruit appearance is unattractive and eating quality is poor

Engineering Contradiction:

Improvefruit appearance and eating qualityVSAvoidmarket potential

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent applies parameter changes by selecting and propagating plants with specific phenotypic characteristics (medium fruit size, white flesh, pink stripes, dark pink to red skin) that differ from conventional varieties. The controlled cross between 'RF' and 'LD5' parents and subsequent selection for specific traits represents systematic parameter optimization to achieve superior fruit appearance and quality.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If current varieties are used, then cultivation continues, but canker tolerance is insufficient

Engineering Contradiction:

Improvecanker toleranceVSAvoidNeoscytalidium dimidiatum canker

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful effect of canker disease into a selection criterion. By deliberately selecting plants that exhibit tolerance to Neoscytalidium dimidiatum canker from the seedling population, the invention transforms a negative factor (disease pressure) into a beneficial selection mechanism that produces disease-resistant varieties.

Inventive Principle:

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

3Stability of the object's composition

If asexual propagation is used to maintain variety characteristics, then true-to-type propagation is achieved, but propagation stability must be verified

Engineering Contradiction:

Improvevariety characteristics stabilityVSAvoidpropagation stability

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent implements feedback by systematically evaluating propagated plants to verify they maintain true-to-type characteristics. The clonal trials and evaluation processes provide feedback loops that confirm the stability of inherited traits through asexual propagation, ensuring the variety remains consistent across generations.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUSPP33153P2Dragon fruit plant named ‘DF14’

Publication Date: 2021.06.15 SOUTHERN HORTICULTURAL RES INST

AI summary

A new and distinct dragon fruit plant is described. The variety resulted from selection among a population of seedlings derived from a controlled cross carried out in 2013 between RF (seed parent) (not patented) and ‘LD5’ (pollen parent) (not patented) located in Tien Qiang, Viet Nam. The variety was selected due to its external appearance, pink strip under the skin, eating quality and canker tolerance.