Pentas Doubled-Flower Gene Breeding

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Solution Overview

Problem

Conventional Pentas flower varieties lack true doubled-flowers with increased petal volume, limiting their popularity and utility in breeding due to the absence of known varieties with monogenic and dominant inheritance traits.

Innovation Solution

Identification of a monogenic, incompletely dominant gene that creates Pentas plants with triple or more whirls of petals, allowing for the breeding of stable doubled-flower varieties with high ornamental value and ease of trait transfer to progeny.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional semi-double varieties are used, then the flower has some increased petal volume, but the petal volume is insufficient and the variety lacks true doubled-flower characteristics

Engineering Contradiction:

Improvepetal volumeVSAvoiddoubled-flower trait stability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent applies parameter changes by identifying and utilizing a specific dominant gene (F1) that controls the doubled-flower trait. By changing the genetic parameter from recessive to dominant inheritance, the patent achieves stable transmission of the doubled-flower characteristic with triple or more whirls of petals, resolving the contradiction between insufficient petal volume and trait stability.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If recessive genetic traits are used for doubled-flowers, then the trait can be expressed, but the trait cannot be easily transferred to progeny by crossing

Engineering Contradiction:

Improvedoubled-flower trait expressionVSAvoidbreeding efficiency

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent inverts the inheritance pattern from recessive to dominant by utilizing the dominant gene F1. This inversion allows the doubled-flower trait to be easily transferred to progeny through crossing, as dominant traits are expressed in the F1 generation without requiring homozygous conditions, thereby dramatically improving breeding efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

3Quantity of substance

If varieties with true doubled-flowers are created, then the ornamental value increases, but the complexity of breeding and gene identification increases

Engineering Contradiction:

Improvepetal volumeVSAvoidbreeding process complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent applies feedback by establishing a clear genetic marker system for the dominant doubled-flower gene F1. This feedback mechanism allows breeders to predict and select for the doubled-flower trait in progeny based on parental genotype, simplifying the breeding process by providing a reliable indicator for trait inheritance and reducing the complexity of breeding operations.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11464196B2Double-flowered Pentas plant and method for growing same

Publication Date: 2022.10.11 SAKATA SEED CORP

AI summary

A Pentas plant having a monogenic, incompletely dominant doubled-flower gene, a method for breeding the same, and a method for providing a Pentas variety with a doubled-flower or semi-double flower phenotype are provided for the purpose of creating a doubled-flower or semi-double flower Pentas plant with voluminous florets and a high ornamental value.