Melon Plants With Wf_11.1 QTL for Marker-Assisted Whitefly Resistance

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Solution Overview

Problem

Current methods for managing silverleaf whitefly (Bemisia tabaci biotype B) in melon crops are inadequate, with existing insecticides being costly and the genetics of whitefly resistance largely unknown, making it difficult to develop resistant cultivars effectively.

Innovation Solution

Introduction of a genetic locus conferring whitefly resistance, specifically the Wf_11.1 QTL, from wild melon accessions into cultivated melon plants, utilizing molecular markers to identify and introgress this resistance into susceptible cultivars, thereby enhancing antixenosis and field resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If insecticides are applied to control whitefly, then whitefly infestation is reduced, but production cost increases and environmental harm occurs

Engineering Contradiction:

Improvewhitefly infestationVSAvoidinsecticide use

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

The patent converts the harmful effect of whitefly infestation into a beneficial outcome by identifying and utilizing natural resistance genes from wild melon accessions. The wild accession PI 161375, which naturally resists whitefly, serves as a genetic resource to develop resistant cultivated varieties, replacing chemical insecticides with biologically-based resistance

Inventive Principle:

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

Solution Approach 2:

The cultivated melon plants are equipped with self-defense capabilities through the introduction of resistance genes. The plants inherently protect themselves against whitefly infestation through antixenosis (non-preference) and antibiosis (antibiotic) mechanisms, eliminating the need for external insecticide applications

Inventive Principle:

Principle #25Self-service

2Reliability

If breeding for whitefly resistance is undertaken, then long-term sustainable control is achieved, but time and resources are required for gene identification and introgression

Engineering Contradiction:

Improvewhitefly resistanceVSAvoidbreeding duration

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary identification and characterization of whitefly resistance genes in wild melon accessions before introgression into cultivated varieties. The resistance QTL on chromosome 11 has been pre-validated and characterized, allowing for efficient marker-assisted selection and accelerating the breeding process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses molecular markers as intermediaries to facilitate the introgression of resistance genes. These markers serve as selectable indicators during the breeding process, enabling efficient tracking and selection of plants that have successfully incorporated the resistance QTL from wild accessions into their genome

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If wild melon accessions are used as resistance sources, then novel resistance genes are introduced, but genetic compatibility and breeding difficulty increase

Engineering Contradiction:

Improveresistance source diversityVSAvoidbreeding complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent employs molecular markers as intermediary tools to simplify the complex process of introgressing genes from wild melon accessions. These markers enable precise tracking of the resistance QTL through generations, facilitating efficient selection and reducing the breeding complexity associated with using wild genetic sources

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3145294B1Melon plants with whitefly resistance

Publication Date: 2025.07.23 NUNHEMS BV

Figure 1
Figure 2A~2B

AI summary

The present invention relates to the field of melon plants having whitefly resistance, in particular to cultivated melon plants comprising an introgression of a whitefly resistance QTL.