Wild Rocket 89-600 RZ Downy Mildew Resistance

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Solution Overview

Problem

Wild rocket (Diplotaxis tenuifolia) production is hindered by downy mildew infections, which cause quantitative and qualitative losses, especially at the seedling stage, due to favorable cool and moist conditions, leading to discolored lesions and necrotic spots that reduce crop quality and quantity.

Innovation Solution

Development of a new wild rocket variety, 89-600 RZ, exhibiting downy mildew resistance, red vein, erect to semi-erect leaf attitude, and absent or weak secondary lobing, achieved through pedigree selection and genetic modification, with seed deposited under NCIMB Accession No. 43615, providing a stable and uniform cultivar.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If wild rocket is grown in cool and moist conditions, then the crop grows quickly, but downy mildew infection increases causing quantitative and qualitative losses

Engineering Contradiction:

Improvegrowth rateVSAvoiddowny mildew infection

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by developing a wild rocket variety with altered genetic parameters that confer resistance to downy mildew. The variety 89-600 RZ possesses specific genetic traits that change its response to the pathogen, allowing it to maintain productivity in cool and moist conditions without suffering the typical quantitative and qualitative losses associated with downy mildew infection

Inventive Principle:

Principle #35Parameter changes

2Reliability

If downy mildew infection occurs, then the disease spreads through leaves, but crop quality and quantity are reduced

Engineering Contradiction:

Improvedisease resistanceVSAvoidcrop quantity and quality

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent converts the harmful effect of downy mildew into a beneficial selection pressure that has produced a resistant variety. The variety 89-600 RZ demonstrates intermediate resistance to downy mildew, transforming what was previously a devastating disease into a manageable condition that allows the crop to maintain both quality and quantity despite favorable conditions for the pathogen

Inventive Principle:

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

Data Source

PatentUS11363769B2Wild rocket variety 89-600 RZ

Publication Date: 2022.06.21 RIJK ZWAAN ZAADTEELT & ZAADHANDEL BV

AI summary

The present invention relates to a Diplotaxis tenuifolia seed designated 89-600 RZ, which exhibits a combination of traits including downy mildew resistance, red vein, erect to semi erect leaf attitude and absent or weak secondary lobing. The present invention also relates to a Diplotaxis tenuifolia plant produced by growing the 89-600 RZ seed. The invention further relates to methods for producing the wild rocket cultivar, represented by wild rocket variety 89-600 RZ.