G.210 Apple Rootstock Hybrid Resisting Fire Blight and Crown Rot

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Solution Overview

Problem

Existing apple tree rootstocks lack resistance to fire blight and crown rot, and often compromise between dwarfing and productivity, with limited compatibility with various scion cultivars and susceptibility to woolly apple aphids and powdery mildew.

Innovation Solution

The development of the 'G.210' apple tree rootstock, a semi-dwarfing hybrid of Malus domestica 'Ottawa 3' and Malus robusta 'Robusta 5', which exhibits resistance to fire blight, crown rot, and powdery mildew, while being highly productive and compatible with multiple scion cultivars, achieved through selective breeding and inoculation processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional apple tree rootstocks are used, then they provide basic structural support, but they lack resistance to fire blight and crown rot

Engineering Contradiction:

Improvedisease resistanceVSAvoidsusceptibility to fire blight and crown rot

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent creates a composite genetic structure by hybridizing Malus domestica 'Ottawa 3' and Malus robusta 'Robusta 5' to produce G.210 rootstock that combines resistance to multiple pathogens (fire blight, crown rot, powdery mildew) with desirable dwarfing characteristics and productivity, resolving the contradiction between basic structural support and disease resistance

Inventive Principle:

Principle #40Composite materials

2Length of moving object

If strong dwarfing rootstocks are used, then tree size is reduced, but productivity and precocity are compromised

Engineering Contradiction:

Improvetree sizeVSAvoidyield efficiency and precocity

Core Design Contradiction:

Length of moving objectVSProductivity

Solution Approach 1:

The patent optimizes the dwarfing parameter by selecting a hybrid that produces semi-dwarfing effects (50-70% of standard size) rather than extreme dwarfing, thereby maintaining a balance between reduced tree size and preserved productivity, precocity, and yield efficiency

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If existing rootstocks are used, then they provide established compatibility, but they show limited compatibility with various scion cultivars

Engineering Contradiction:

Improvecompatibility with scion cultivarsVSAvoidsusceptibility to woolly apple aphids and powdery mildew

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent develops a universal rootstock solution that simultaneously provides broad compatibility with multiple scion cultivars (including apple, crabapple, and other Malus species) while incorporating resistance to woolly apple aphids and powdery mildew, eliminating the need for cultivar-specific rootstock selections

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUSPP23337P3Apple tree rootstock named `G.210`

Publication Date: 2013.01.22 CORNELL UNIVERSITY

AI summary

A new and distinct variety of apple tree rootstock Malus domestica×Malus robusta hybrid ‘G.210’ is described herein. The new variety is a semi-dwarfing rootstock that is resistant to fire blight (Erwinia amylovora) and crown rot (Phytophthora cactorum). The ‘G.210’ rootstock is useful in that it can be propagated clonally and used as a rootstock or root system for apple trees as well as for interstems of apple trees.