Actinidia Rootstock Breeding for Waterlogging and PSA Resistance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current Actinidia valvata cultivars lack strong growth vigor and waterlogging tolerance, and are susceptible to Pseudomonas syringae pv. actinidiae (PSA), making them unsuitable as robust rootstocks for Actinidia chinensis.

Innovation Solution

The development of the 'YNRT-1' cultivar, which exhibits strong growth vigor, resistance to waterlogged soils, and resistance to Pseudomonas syringae pv. actinidiae (PSA), achieved through controlled breeding and stable asexual propagation by hardwood stem cuttings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current Actinidia valvata cultivars are used as rootstocks, then they can provide basic growth support, but they lack strong growth vigor and waterlogging tolerance

Engineering Contradiction:

Improvegrowth vigorVSAvoidwaterlogging tolerance

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by selecting and breeding plants with specific genetic parameters that confer waterlogging tolerance and strong growth vigor. The 'YNRT-1' cultivar was developed through controlled breeding to optimize these physiological parameters, resulting in a rootstock that maintains high growth vigor while adapting to waterlogged conditions better than existing cultivars.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If current Actinidia valvata cultivars are used as rootstocks, then they can provide basic support, but they are susceptible to Pseudomonas syringae pv. actinidiae (PSA)

Engineering Contradiction:

Improvedisease resistanceVSAvoidPSA susceptibility

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful effect of PSA susceptibility into a beneficial trait by breeding 'YNRT-1' with enhanced resistance to the bacteria. The controlled breeding program specifically selected for resistance to Pseudomonas syringae pv. actinidiae, transforming the vulnerability of existing cultivars into a strength of the new cultivar, which now exhibits resistance to this pathogen.

Inventive Principle:

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

3Stability of the object's composition

If asexual propagation by hardwood stem cuttings is used, then stable and true-to-type characteristics are achieved, but propagation time and complexity increase

Engineering Contradiction:

Improvecharacteristic stabilityVSAvoidpropagation time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by preparing hardwood stem cuttings in advance during the dormant season, allowing them to be ready for planting when optimal conditions arise. This preliminary preparation ensures that the propagation material is already suited for successful rooting, reducing the actual propagation time when planting is needed while maintaining the stability and true-to-type characteristics of the cultivar.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUSPP34812P2<i>Actinidia </i>plant named ‘YNRT-1’

Publication Date: 2022.12.13 WANG ZHONGYAN

AI summary

A new cultivar of Actinidia plant named ‘YNRT-1’ that is characterized by its strong, vigorous growth habit, its good growth in wet and waterlogged soil, its resistance to Pseudomonas syringae pv. actinidiae (PSA), and its lack of fruit production as it is a male cultivar.