Chimeric Pepper Fruit Color Segmentation via CCS Allele Crossing
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Solution Overview
Problem
There is a need for new and interesting pepper varieties to meet consumer demands, particularly for hybrid peppers that exhibit unique color patterns such as yellow and red stripes, which existing pepper breeding methods struggle to achieve efficiently.
Innovation Solution
The development of chimeric pepper plants by crossing pepper varieties with specific alleles at the capsanthin-capsorubin synthase (CCS) locus, resulting in seeds that produce pepper fruit with yellow and red striped colors, achieved through selective breeding and marker analysis to ensure consistent propagation of desired traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional pepper breeding methods are used, then existing pepper varieties can be maintained, but unique color patterns such as yellow and red stripes cannot be efficiently achieved
Solution Approach 1:
The pepper fruit is segmented into different tissue layers (epidermis, mesocarp, endocarp) with distinct color expressions. The epidermis displays the characteristic yellow and red stripes while the inner tissues have different coloration, allowing the unique color pattern to be achieved in specific regions without affecting the entire fruit structure.
Solution Approach 2:
Different regions of the pepper fruit have different color qualities - the epidermal layers exhibit the distinctive yellow and red striping while the mesocarp and endocarp have different coloration. This local differentiation of color quality allows the fruit to display unique patterns in specific areas while maintaining overall fruit integrity.
2Adaptability or versatility
If hybrid pepper plants are developed through crossing, then new varieties with unique colors can be produced, but genetic stability and consistency of desired traits may be compromised
Solution Approach 1:
The patent employs preliminary actions including marker-assisted selection and controlled crosses between specific parent lines (e.g., OP.1745 yellow pepper and OP.2023 red pepper) to pre-determine the genetic composition of offspring. This allows the desired color pattern traits to be established before the breeding process completes, ensuring genetic stability.
Solution Approach 2:
The patent utilizes marker analysis and phenotypic observation as feedback mechanisms to monitor and select plants that inherit the desired yellow and red striped color pattern. By continuously observing and selecting for the presence of specific color markers, the breeding process ensures genetic stability and consistency of the desired traits across generations.
3Reliability
If selective breeding and marker analysis are used, then consistent propagation of desired traits can be ensured, but the complexity of the breeding process increases
Solution Approach 1:
The patent introduces marker analysis as an intermediary tool between the crossing process and the selection of desired traits. Molecular markers serve as indicators that facilitate the identification and selection of plants with the desired yellow and red striped color pattern, simplifying the overall breeding process by providing clear genetic markers to work with.
Solution Approach 2:
The patent utilizes parameter changes in the breeding process, such as controlling pollination timing, selecting specific parent lines with known genetic characteristics, and monitoring phenotypic expressions at different developmental stages. These controlled parameter changes enable consistent propagation of desired traits while managing process complexity through systematic approaches.
Data Source
AI summary
Certain aspects of the present disclosure relate to chimeric pepper plants that produce pepper fruit having a yellow and red striped color, and to seeds that produce the chimeric pepper plants. Other aspects of the present disclosure relate to methods of generating and selecting chimeric pepper plants that produce pepper fruit having a yellow and red striped color, as well as methods of limiting propagation of off-type pepper plant progeny that produce pepper fruit of a single color.