Metolius Mint Somatic Hybridization Disease Tolerance

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Solution Overview

Problem

Current mint varieties, such as commercial peppermint (Mentha piperita), lack tolerance to Verticillium wilt and mint rust, and their oil profiles change with maturity, making them less desirable for the essential oil industry.

Innovation Solution

Development of the 'Metolius' variety through somatic hybridization of unpatented Mentha canadensis and Mentha piperita, resulting in a peppermint-type oil profile with enhanced tolerance to Verticillium wilt and mint rust, and stable oil composition across maturity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If commercial peppermint (Mentha piperita) is cultivated for peppermint-type oil production, then the oil profile is desirable, but the plant lacks tolerance to Verticillium wilt and mint rust

Engineering Contradiction:

Improvedisease toleranceVSAvoidsusceptibility to Verticillium wilt and mint rust

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention combines the desirable peppermint-type oil profile of Mentha piperita with the disease tolerance of Mentha canadensis through somatic hybridization, creating a new variety that merges the beneficial traits of both parent species

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The new mint variety represents a composite genetic material resulting from somatic hybridization, combining the genetic characteristics of M. piperita (oil profile) and M. canadensis (disease resistance) into a single plant with composite beneficial properties

Inventive Principle:

Principle #40Composite materials

2Productivity

If mint varieties are cultivated for oil production, then the oil yield is sufficient, but the oil profile changes with plant maturity making quality control difficult

Engineering Contradiction:

Improveoil yieldVSAvoidoil profile consistency

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

Instead of selecting varieties that produce high oil yield and accepting variable quality, the invention inverts the approach by selecting for genetic stability in oil profile composition that maintains consistent quality across different maturity stages, then optimizing yield within that stable framework

Inventive Principle:

Principle #13The other way round (Inversion)

3Object-affected harmful factors

If Mentha canadensis varieties are cultivated for disease tolerance, then resistance to Verticillium wilt and mint rust is improved, but the oil profile lacks the desirable peppermint type characteristics

Engineering Contradiction:

Improvetolerance to Verticillium wilt and mint rustVSAvoidpeppermint-type oil profile

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention merges the disease tolerance of M. canadensis with the peppermint-type oil profile characteristics of M. piperita through somatic hybridization, creating a variety that simultaneously exhibits both beneficial traits

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUSPP21053P3Mint plant named `Metolius`

Publication Date: 2010.06.08 TODD A M

AI summary

A new and distinct variety of Mentha canadensis (‘Metolius’) is characterized by its unique oil chemistry and flavor profile resembling that of peppermint oil, and by its tolerance to Verticillium wilt (Verticillium dahliae) and mint rust (Puccinia menthae). DNA microsatellite marker analysis has shown that ‘Metolius’ is a distinct variety of M. canadensis.