April Zee Peach Tree Lower Chilling Requirements

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Solution Overview

Problem

Existing peach tree varieties face limitations in terms of chilling requirements, maturity timing, fruit size, and eating quality, which affect their productivity and adaptability in different climatic conditions.

Innovation Solution

The development of a new peach tree variety, 'April Zee', resulting from a cross between proprietary seedlings and 'Super Lady' Peach, which exhibits lower chilling requirements, earlier maturity, larger fruit size, and improved eating quality, and is propagated using the 'Nemaguard' Rootstock for accelerated fruit production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If existing peach tree varieties are used, then they have established fruit production, but they require high chilling hours (400 hours) and have later maturity timing

Engineering Contradiction:

Improvechilling requirementVSAvoidmaturity timing

Core Design Contradiction:

TemperatureVSProductivity

Solution Approach 1:

The patent applies parameter changes by selecting and propagating a peach seedling that naturally requires fewer chilling hours (200 hours) compared to existing varieties (400 hours), thereby changing the thermal parameter requirement while maintaining productive maturity timing characteristics

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If existing peach tree varieties are used, then they have known fruit production, but they produce smaller fruit size and average eating quality

Engineering Contradiction:

Improvefruit sizeVSAvoideating quality

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent uses asexual reproduction methods (budding, grafting, tissue culture) to create exact copies of the superior peach seedling selected in 2010, ensuring that all cloned trees produce the same large fruit size and excellent eating quality characteristics without variation

Inventive Principle:

Principle #26Copying

3Stability of the object's composition

If asexual reproduction is used to propagate the new variety, then true-to-type reproduction is achieved, but the propagation process requires specific rootstock and technical expertise

Engineering Contradiction:

Improvetrue-to-type reproductionVSAvoidpropagation process

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent employs 'Nemaguard' rootstock as an intermediary that facilitates the asexual reproduction process, providing a stable foundation that enables budding and grafting while ensuring the new variety remains true-to-type without requiring complex propagation techniques

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUSPP30012P2Peach tree named ‘April Zee’

Publication Date: 2018.12.25 ZAIGER GARY NEIL

AI summary

A new and distinct variety of peach tree (Prunus persica). The following features of the tree and its fruit are characterized with the tree budded on ‘Nemaguard’ Rootstock (non-patented), grown on Handford sandy loam soil with Storie Index rating 95, in USDA Hardiness Zone 9, near Modesto, Calif., with standard commercial fruit growing practices, such as pruning, thinning, spraying, irrigation and fertilization. Its novelty consist of the following combination of desirable features:1. Tree having a vigorous, upright growth habit.2. Tree being a regular and productive bearer of large size fruit.3. Clingstone fruit with firm, yellow flesh.4. Fruit with good flavor and eating quality.5. Fruit having an attractive red skin color.