Seedless Lemon Cultivar with Trifoliate Orange Rootstock Compatibility

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Solution Overview

Problem

Existing lemon cultivars face challenges such as low yield, seediness, and incompatibility with certain rootstocks, which affect their suitability for high oil production and commercial cultivation.

Innovation Solution

The development of a new lemon cultivar, 'CE-D5-1-9-42', which is a nearly seedless, irradiated budwood clone from 'Cook Eureka' lemon, selected for high peel oil production and compatibility with 'Flying Dragon' rootstock, thereby overcoming issues of seediness and rootstock incompatibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If existing lemon cultivars are used for high oil production, then peel oil yield can be improved, but seediness and rootstock incompatibility problems worsen

Engineering Contradiction:

Improvepeel oil yieldVSAvoidseedlessness and rootstock compatibility

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent applies irradiation treatment to budwood of Cook Eureka lemon, inducing genetic mutations that result in the new cultivar 'CE-D5-1-9-42'. This parameter change in the genetic material produces simultaneous improvements in multiple traits: high peel oil content, near seedlessness, and compatibility with trifoliate orange rootstocks, thereby resolving the contradiction between oil yield and reliability

Inventive Principle:

Principle #35Parameter changes

2Productivity

If 'Eureka' lemon clones are grafted on trifoliate orange rootstocks, then tree size control can be improved, but graft incompatibility worsens

Engineering Contradiction:

Improvetree size controlVSAvoidgraft compatibility

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The irradiation-induced mutation in the budwood of Cook Eureka lemon fundamentally changed the genetic parameters of the scion, creating a new cultivar that is compatible with trifoliate orange rootstocks. This allows successful grafting and achieves the desired tree size control without the incompatibility issues that plague traditional Eureka clones

Inventive Principle:

Principle #35Parameter changes

3Productivity

If traditional lemon cultivars are selected for high fruit production, then early yield can be improved, but seediness increases

Engineering Contradiction:

Improveearly fruit productionVSAvoidseed content

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

Irradiation of Cook Eureka lemon budwood induced genetic mutations that produced the new cultivar 'CE-D5-1-9-42', which simultaneously achieves high early fruit production and near seedlessness. The mutation altered the reproductive parameters of the plant, reducing seed formation while maintaining or enhancing fruit production capacity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP36742P3Lemon plant named ‘CE-D5-1-9-42’

Publication Date: 2025.06.17 FLORIDA FOUNDATION SEED PRODUCERS INC

AI summary

A new and distinct cultivar of lemon plant named ‘CE-D5-1-9-42’, characterized by nearly seedless fruit, early fruiting, and high fruit production. Additionally, the new lemon cultivar also is compatible with trifoliate orange rootstocks, unlike most lemon varieties. This new cultivar has high quality fresh fruit, as well as juice, peel oil, and other lemon by-products viable for processing. Further, given the new lemon cultivar's good HLB tolerance typical of lemons, and its near seedlessness, this new cultivar may have significant dooryard tree potential.