xPortmea DURALIL Cultivar Inflorescence Stability via Segmentation

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Solution Overview

Problem

There is a need for a new cultivar of xPortmea that exhibits unique and stable inflorescence characteristics, such as elongated compound spikes with pink peduncles and vibrant dark red-purple secondary bracts that fade to light pink, which are not observed under all environmental conditions without variance in genotype.

Innovation Solution

The cultivar 'DURALIL' is developed through controlled pollination breeding of Aechmea smithiorum var. longistipitata and Portea alatisepela, with asexual reproduction by mericloning, resulting in a distinct xPortmea cultivar with specific inflorescence traits that remain stable across different environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a new xPortmea cultivar is developed through controlled pollination breeding to achieve unique inflorescence characteristics, then the inflorescence traits (elongated compound spikes with pink peduncles and vibrant dark red-purple secondary bracts) are improved, but the stability of these traits across different environmental conditions may be compromised

Engineering Contradiction:

Improveinflorescence characteristicsVSAvoidtrait stability across environments

Core Design Contradiction:

ShapeVSStability of the object's composition

Solution Approach 1:

The breeding program segmented the inflorescence traits into specific target characteristics (peduncle color, bract color, inflorescence shape) and worked to stabilize each independently through controlled pollination and selection across multiple generations

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cultivar underwent preliminary stabilization through five generations of asexual reproduction by mericloning before commercial release, ensuring that the unique inflorescence traits were genetically fixed and would remain stable under various environmental conditions

Inventive Principle:

Principle #10Preliminary action

2Stability of the object's composition

If the cultivar is propagated asexually by mericloning to maintain genetic stability, then the genotype remains constant and traits are true to type, but the time and resources required for propagation increase

Engineering Contradiction:

Improvegenetic stabilityVSAvoidpropagation time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The cultivar was preliminarily stabilized through five generations of mericloning propagation before commercial release, establishing a proven propagation protocol that ensures genetic fidelity while minimizing future propagation time

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The propagation process was optimized by adjusting cultural parameters (temperature, humidity, growth medium composition) during mericloning to reduce propagation time while maintaining high genetic stability and true-to-type characteristics

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP31983P2x<i>Portmea </i>plant named ‘DURALIL’

Publication Date: 2020.07.14 SKOTAK JR CHESTER

AI summary

A new and distinct xPortmea cultivar named ‘DURALIL’ which is characterized by an elongated compound spike inflorescence, a light pink peduncle and secondary branches, large pink bracts subtending the secondary branches of the inflorescence, secondary conduplicate bracts which envelope each flower bud along the length of the secondary branches, secondary bracts which are vibrant dark red-purple and fading to light pink towards the base, as well as the stability of these characteristics from generation to generation.