Grapefruit TR-1 Budsport Mutation Reduces Bitterness
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Solution Overview
Problem
The existing grapefruit varieties, such as 'Rio Red', have limitations in terms of flavor mildness and bitterness, which are not adequately addressed, and there is a need for a new variety with distinct color and internal quality characteristics.
Innovation Solution
The new grapefruit variety 'TR-1' is developed through a budsport mutation from 'Rio Red', grafted onto C-22 bitter orange rootstock, exhibiting a red external color and reduced bitterness with a mild flavor, and is stable across multiple generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing grapefruit varieties like 'Rio Red' are used, then they have established market presence and growth characteristics, but they exhibit strong bitterness and harsh flavor that limit consumer acceptance
Solution Approach 1:
The patent applies parameter changes by selecting a budsport mutation that fundamentally alters the chemical composition parameters of the fruit. The new variety 'TR-1' exhibits dramatically reduced bitterness (0-5% of Rio Red levels) and modified flavor compound profiles through natural genetic variation, transforming the sensory parameters without changing the basic grapefruit species characteristics
Solution Approach 2:
The invention uses a budsport mutation technique that creates a genetic copy with modified traits. The mutation originated as a spontaneous genetic variation on a Rio Red grapefruit tree, creating a cloned variety that inherits all the desirable growth and fruit characteristics of the parent while eliminating the harmful bitterness through the mutation event
2Object-affected harmful factors
If new grapefruit varieties are developed to improve flavor, then internal quality and mildness are enhanced, but external color characteristics may differ from consumer expectations
Solution Approach 1:
The patent demonstrates parameter changes by accepting and utilizing the natural color variation (red blush to yellow) as a characteristic of the new variety. The external color parameter was not artificially modified but naturally expressed through the budsport mutation, while the internal quality parameters (bitterness, flavor mildness) were dramatically improved through the same genetic variation
3Shape
If grapefruit varieties are bred for distinct color characteristics, then external appearance is enhanced, but flavor mildness and bitterness reduction may be compromised
Solution Approach 1:
The invention copies the successful combination of color and flavor traits from the natural budsport mutation. Rather than separately breeding for color and flavor, the mutation naturally produced both the distinctive red-yellow coloration and the improved mild flavor profile with reduced bitterness in the same genetic line, which was then propagated through grafting
Data Source
AI summary
The new grapefruit ‘TR-1’ is provided. The variety is produced from a mutation of ‘Rio Red’ grapefruit, which can be distinguished by its outstanding features. TR-1 is a red grapefruit variety originated as a budsport mutation from Rio Red grapefruit and differentiating from the Rio Red grapefruit by a Red external color contrasting to the yellow with red blush from Rio Red grapefruit. The internal color is red with milder flavor reduced bitter taste.