Lettuce Pensacola Breeding via Marker-Assisted Selection

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Solution Overview

Problem

There is a need for new lettuce varieties that are stable, high-yielding, and agronomically sound to meet the increasing global demand for lettuce, with a focus on improved traits such as disease resistance, pest resistance, and adaptability to various environmental conditions.

Innovation Solution

The development of new lettuce varieties, designated as 'Cavendish', 'Clearwater', and 'Pensacola', which incorporate traits like resistance to downy mildew, lettuce mosaic virus, and Nasonovia ribisnigri biotype 0, achieved through breeding methods including backcrossing and genetic marker-enhanced selection, introducing genes for herbicide resistance, pest resistance, and disease resistance, and suitable for cultivation in diverse conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional breeding methods are used to develop new lettuce varieties, then genetic diversity and adaptability are improved, but breeding time and complexity increase

Engineering Contradiction:

Improveadaptability to environmental conditionsVSAvoidbreeding time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent employs marker-assisted selection where DNA markers provide feedback on the presence of desired resistance genes during the breeding process. This allows breeders to track and select for specific traits (downy mildew resistance, LCM resistance, NR0 resistance) across multiple generations, accelerating the breeding process while maintaining genetic diversity and adaptability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces traditional phenotypic selection (visual assessment of disease resistance) with molecular marker-based genotypic selection. This substitution of mechanical/biological assessment with molecular analysis enables earlier and more accurate selection of resistant plants, reducing breeding time while improving adaptability to disease pressures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If multiple disease and pest resistance traits are incorporated into lettuce varieties, then resistance to harmful factors is improved, but genetic complexity and breeding difficulty increase

Engineering Contradiction:

Improveresistance to diseases and pestsVSAvoidgenetic complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent segments the complex task of developing multi-resistant lettuce varieties into manageable components by using specific DNA markers for each resistance trait (downy mildew, LCM, NR0). Each marker allows independent tracking and selection of individual resistance genes, simplifying the breeding process despite the multiple traits being combined.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent develops a universal marker-assisted selection system that can simultaneously track multiple resistance traits using different molecular markers. This multi-functional approach allows breeders to select for downy mildew resistance, LCM resistance, and NR0 resistance in the same breeding population, efficiently combining multiple protective functions in single lettuce varieties.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11889805B2Lettuce variety ‘Pensacola’

Publication Date: 2024.02.06 ENZA ZADEN BEHEER BV

AI summary

New lettuce variety designated ‘Pensacola’ is described. ‘Pensacola’ is a lettuce variety exhibiting stability and uniformity.