Tomato Fruit Shape Elongation via SUN Gene Retrotransposition
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Solution Overview
Problem
The molecular mechanisms underlying fruit shape variation in plants, particularly in tomatoes, are not well understood, and existing methods lack effective means to alter fruit shape beyond traditional breeding techniques, limiting the ability to produce elongated fruit shapes suitable for mechanical harvesting and fresh consumption.
Innovation Solution
A transgenic approach involving the expression of specific polynucleotides and polypeptides, such as IQD12, is used to alter fruit shape by introducing a SUN gene construct into tomato plants, which affects hormone sensitivity and gene expression, leading to elongated fruit shapes through duplication and repositioning events mediated by retrotransposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional breeding techniques are used to alter fruit shape, then fruit shape variation can be achieved, but the process is time-consuming and limited in the range of achievable shapes
Solution Approach 1:
The patent changes the molecular parameters by introducing transgenic constructs (SUN gene, IQD12 polypeptide) that directly alter fruit development pathways, bypassing the slow process of traditional breeding and enabling rapid generation of elongated fruit shapes with controlled morphology
Solution Approach 2:
The patent uses molecular intermediaries (transgenic DNA constructs, RNAi molecules) to mediate the alteration of fruit shape, where these molecular agents directly interfere with or activate specific gene pathways controlling fruit morphology, achieving shape modification without traditional multi-generational breeding
2Manufacturing precision
If transgenic approaches are used to alter fruit shape, then rapid shape modification is achieved, but the complexity of the method increases
Solution Approach 1:
The patent extracts and isolates specific genetic determinants (SUN gene, IQD12 sequence) that control fruit shape, separating the key morphological control mechanism from the complex background genome, allowing precise manipulation of fruit shape through targeted transgenic introduction of only the necessary genetic elements
Solution Approach 2:
The patent segments the fruit shape control mechanism into discrete, manipulable genetic components (SUN gene construct, IQD12 polypeptide coding sequence, promoter regions), enabling independent optimization and precise control of each element's contribution to the overall fruit morphology
Data Source
AI summary
Compounds, methods for producing them and methods for varying the morphology of plants are disclosed. More particularly, a SUN gene can be used to alter the shape of fruit in a plant such as a tomato plant.