Luiza Apple Tree Breeding for Disease Resistance and Early Maturity

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Solution Overview

Problem

Existing apple tree varieties lack resistance to Gala leaf spot disease and have high chilling requirements, which can limit their growth and fruit production in certain climates, and often have lower sugar content and juiciness compared to 'Luiza'.

Innovation Solution

The 'Luiza' apple tree variety, resulting from a controlled cross between 'Imperatriz' and 'Cripps Pink', exhibits resistance to Gala leaf spot disease and has a lower chilling requirement, producing fruit with higher sugar content, juiciness, and earlier ripening, characterized by a deeper red skin color and production predominantly on spur buds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing apple tree varieties are used, then they can grow in certain climates, but they lack resistance to Gala leaf spot disease and have high chilling requirements

Engineering Contradiction:

Improvedisease resistanceVSAvoidchilling requirement

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by breeding a new apple variety 'Luiza' with modified physiological parameters - specifically reduced chilling requirement (can grow in warmer climates) and enhanced disease resistance to Gala leaf spot, while maintaining fruit quality attributes like sugar content and juiciness

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If existing apple tree varieties are used, then they can produce fruit, but the fruit has lower sugar content and juiciness compared to 'Luiza'

Engineering Contradiction:

Improvesugar contentVSAvoidfruit quality

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent achieves parameter changes in fruit composition by developing 'Luiza' apples with elevated sugar content (Brix 13.0-13.5) and enhanced juiciness (85-90% water content), improving the sensory quality parameters while maintaining productivity

Inventive Principle:

Principle #35Parameter changes

3Speed

If existing apple tree varieties are used, then they can mature fruit, but the fruit ripens later compared to 'Luiza'

Engineering Contradiction:

Improveripening speedVSAvoidtime to maturity

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The patent implements parameter changes in the phenological development of 'Luiza' apples, achieving earlier fruit maturity and extended hanging time on the tree, which allows faster ripening and longer marketable presence compared to traditional varieties

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP29931P3Apple tree named ‘Luiza’

Publication Date: 2018.12.04 EMPRESA DE PESQUISA AGROPECUARIA E EXTENSAO RURAL DE SANTA CATARINA EPAGRI

AI summary

‘Luiza’ apple tree (Malus domestica Borkh) is a new variety selected for its low chilling requirement, resistance to Gala leaf spot disease, high fruit quality, and early fruit maturity.