Sheegene-20 Grapevine Hybridization for Late Maturity and Red Color
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Solution Overview
Problem
There is a need for a new variety of Vitis vinifera that produces medium-large, red-colored seedless grapes with good flavor and suitable for late September harvest in the San Joaquin Valley of Central California, as existing varieties like 'Flame Seedless' have limitations in maturity and other characteristics.
Innovation Solution
The 'Sheegene-20' grapevine, resulting from the hybridization of 'Princess' and 'Red Globe', produces medium-large, red-colored seedless grapes with improved flavor and maturity, exhibiting distinct characteristics such as later maturity compared to 'Flame Seedless', and is asexually propagated on 'Freedom' virus-free grape rootstock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If 'Flame Seedless' variety is used, then early maturity is achieved, but the grape size and flavor quality are limited
Solution Approach 1:
The patent applies parameter changes by hybridizing two parent varieties with different characteristics to create a new variety with optimized parameters. The 'Princess' parent contributes to grape size and flavor quality, while the 'Red Globe' parent contributes to maturity timing, resulting in a balanced combination that resolves the contradiction between early maturity and fruit quality.
Solution Approach 2:
The new grape variety combines genetic material from two different parent varieties ('Princess' and 'Red Globe') to create a composite genetic structure. This composite approach allows the offspring to inherit desirable traits from both parents, achieving both good flavor quality and appropriate maturity timing that neither parent alone could provide.
2Quantity of substance
If medium-large grape size is achieved, then market quality improves, but productivity per unit time decreases
Solution Approach 1:
The hybridization process optimizes the parameter of grape size to medium-large, which balances market quality requirements with productivity. The new variety achieves sufficient grape size for marketability while maintaining a maturity schedule that ensures adequate production rates for commercial viability.
3Shape
If red color is achieved, then market appeal improves, but resistance to disease may be reduced
Solution Approach 1:
The patent optimizes the color parameter to red, which provides market appeal. The hybridization also introduces genetic diversity that can enhance disease resistance, balancing the aesthetic requirement with the reliability requirement for commercial production.
Data Source
AI summary
A new and distinct variety of grapevine characterized by the production of medium to large, red-colored seedless grapes that mature in late September, approximately nine weeks later than ‘Flame Seedless’ (unpatented) when grown in the San Joaquin Valley of Central California. The grapes of this new variety are produced on strong woody stems and branches and are well adapted to commercial handling.