Transgenic Green Barb Fish via Stable Transgene Integration
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Solution Overview
Problem
The ornamental fish industry faces limitations in developing transgenic fish that express fluorescent proteins, particularly for aesthetically pleasing colors like green, due to challenges in introducing and stabilizing foreign genes in fish species such as the tiger barb, which affects the visualization of colors in commercially cultured fish.
Innovation Solution
The development of transgenic fluorescent fish, specifically the 'Green barb 1' transformation event, where chromosomally integrated transgenes are used to create fertile, green-colored fish, allowing for homozygous or heterozygous expression, and methods for breeding and distributing these fish to the market, utilizing techniques like microinjection and in vitro fertilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transgenic technology is used to introduce fluorescent proteins into fish, then new varieties of fish with fluorescent colors can be created, but the foreign genes are difficult to stabilize and inherit in fish species
Solution Approach 1:
The patent applies preliminary action by creating a stable transgenic line through multiple steps: introducing the fluorescent protein gene (e.g., GFP) into the fish genome, selecting for stable integration, and establishing a breeding line that consistently produces transgenic offspring. This preliminary work ensures that the transgene is reliably inherited and expressed in subsequent generations, resolving the stability issue.
2Shape
If dark striped pigmentation is present in tiger barb, then the fish have distinct wild-type appearance, but the colors are difficult to visualize and display efficiently
Solution Approach 1:
The patent applies local quality by creating albino variants with reduced melanosome pigment cells in specific regions, allowing fluorescent proteins to be visualized locally without the masking effect of dark pigmentation. This selective modification of pigment cell distribution enables the fluorescent colors to stand out while maintaining the overall aesthetic appeal of the fish.
3Loss of information
If fluorescent proteins are introduced into fish, then new markers and reporters are provided for transgenesis, but progress in developing ornamental fish with these proteins has been limited
Solution Approach 1:
The patent applies universality by developing a transgenic system that simultaneously serves multiple purposes: providing scientific markers for transgenesis research, creating aesthetically pleasing ornamental fish, and enabling both research and commercial applications. The same transgenic platform can be used for different fluorescent proteins and fish species, making it a universal solution for both scientific and commercial needs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The 'Green barb 1' transgenic fish provide aesthetically pleasing green coloration, are fertile, and can be easily identified, offering improved products for the ornamental fish market and potential scientific research tools for tracing cell lineage and marking cells in genetic studies.
Implementation Method 1
transgenic fish that express fluorescent proteins, particularly for aesthetically pleasing colors like green
Data Source
AI summary
The present invention relates to transgenic green ornamental fish, as well as methods of making such fish by in vitro fertilization techniques. Also disclosed are methods of establishing a population of such transgenic fish and methods of providing them to the ornamental fish industry for the purpose of marketing.