Sheegene 25 Grapevine Breeding for Large Berries and Loose Clusters
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Solution Overview
Problem
Current red, seedless grape cultivars like 'Scarlet Royal', 'Crimson Seedless', and 'Ruby Seedless' have smaller berries, tighter clusters, and less deeply lobed leaves compared to 'Sheegene 25', which offers larger, truncate berries and medium to loose clusters with distinct leaf morphology.
Innovation Solution
The 'Sheegene 25' grapevine variety, resulting from a cross between 'Princess' and 'Red Globe', exhibits unique characteristics such as large, seedless, red berries, truncate shape, medium to loose clusters, and deeply lobed leaves, distinguishing it from its parent and sibling cultivars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional red seedless grape cultivars like 'Scarlet Royal', 'Crimson Seedless', and 'Ruby Seedless' are used, then the grapes are seedless and red, but the berries are smaller and clusters are tighter
Solution Approach 1:
The patent applies parameter changes by creating a new cultivar 'Sheegene 25' with modified genetic parameters that result in larger berries (7g average weight) and looser cluster density compared to conventional red seedless cultivars. The cross between 'Princess' and 'Red Globe' produces offspring with altered physical parameters including increased berry size and changed cluster architecture.
Solution Approach 2:
The patent inverts the typical characteristics of red seedless grapes by producing a cultivar where berries are larger and clusters are looser rather than smaller and tighter. This inversion is achieved through selective breeding that reverses the conventional trait expression found in commercial red seedless varieties.
2Shape
If conventional red seedless grape cultivars are used, then the grapes are seedless, but the lateral sinuses of leaves are much less deeply lobed
Solution Approach 1:
The patent applies local quality by focusing on the specific morphological characteristic of leaf lateral sinuses. The 'Sheegene 25' cultivar exhibits deeply lobed lateral sinuses as a distinctive local feature that differentiates it from parent cultivars and conventional red seedless varieties, while other parts of the plant maintain typical grapevine characteristics.
3Quantity of substance
If 'Sheegene 25' is bred to have larger berries, then berry size increases to 7g, but this requires successful cross-breeding between different cultivars
Solution Approach 1:
The patent uses an intermediary approach by employing a controlled cross-breeding program between 'Princess' and 'Red Globe' cultivars. The breeding process acts as an intermediary mechanism to transfer and combine desirable traits, resulting in the 'Sheegene 25' cultivar with increased berry weight while managing the complexity through systematic selection and propagation protocols.
Data Source
AI summary
A new and distinct grapevine plant named ‘Sheegene 25’, characterized by the following unique combination of characteristics: ‘Sheegene 25’ a cultivar developed as a table grape having berries that are large, red, and seedless. The large berries are approximately 7 g each naturally and without girdling or application of plant growth regulators. Harvest is during August when maturity reaches 17-22° brix.