Seedless Table Grape Cultivar Breeding for Cracking Resistance
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Solution Overview
Problem
There is a need for a new variety of Vitis vinifera that exhibits stable and unique characteristics such as seedlessness, resistance to cracking, and tolerance to varying environmental conditions, including temperature and water scarcity, which are not adequately addressed by existing grape cultivars.
Innovation Solution
The development of the 'Itumseventeen' cultivar, which is a result of deliberate cross-breeding between 'ITUM-150-242' and 'Superior', exhibiting traits like medium-sized, yellow to light green seedless table grapes with a broad ellipsoid shape, firm texture, and muscat flavor profile, and showing tolerance to high temperatures and water shortage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If seedless grape varieties are developed through breeding, then consumer appeal and marketability improve, but genetic stability and true-to-type reproduction may be compromised
Solution Approach 1:
The patent combines multiple desirable traits from different parent varieties through controlled cross-breeding. The female parent 'ITUM-150-242' contributes seedlessness and yellow-green coloration, while the male parent 'Superior' contributes Muscat flavor and resistance traits. This merging of genetic material from two distinct varieties achieves the complex goal of creating a seedless grape with stable inheritance of multiple characteristics.
Solution Approach 2:
The breeding program implemented systematic evaluation and selection processes to ensure genetic stability. Multiple generations were propagated and tested to verify that the unique features (seedlessness, color, flavor, resistance) were reproduced true to type. This feedback mechanism confirmed that the hybrid variety maintained genetic stability across generations.
2Reliability
If grape varieties are bred for resistance to environmental stresses like high temperature and water shortage, then reliability under varying conditions improves, but breeding complexity and time required increase
Solution Approach 1:
The patent utilized parent varieties that already possessed known resistance traits to high temperature and water shortage. By selecting 'ITUM-150-242' and 'Superior' as parents with pre-established environmental tolerances, the breeding program inherited these resistance characteristics without having to develop them from scratch, thereby reducing breeding complexity while maintaining reliability.
Solution Approach 2:
The breeding program evaluated the new variety under varying environmental parameters (temperature, water availability) to confirm its tolerance. The variety demonstrated observed tolerance of water shortage and temperatures up to 41° C., confirming that the genetic parameters for environmental resistance were successfully transferred and stabilized in the hybrid variety.
3Ease of operation
If grape varieties are developed with firm texture and cracking resistance for shipping suitability, then post-harvest handling and shipping capability improve, but fruit softness and edibility may be reduced
Solution Approach 1:
The patent achieved different quality characteristics in different aspects of the same fruit. The berry skin and flesh developed firmness specifically for shipping and handling resistance, while maintaining the Muscat flavor profile and edibility. This local quality differentiation allowed the fruit to be both shipable and enjoyable to consume.
Data Source
AI summary
A new and distinct variety of grapevine named of ‘Itumseventeen’ is herein disclosed. ‘Itumseventeen’ abundantly forms medium sized light green to yellow colored berries with an attractive broad ellipsoid berry shape, a Muscat flavor and a firm berry texture. Being mid-season variety, the fruit commonly is ready for harvesting in from July to early September in Blanca, Murcia, Spain. ‘Itumseventeen’ displays good eating qualities as a table grape, the fruit meatiness and firmness render the fruit amenable for handling, shipping, and storage.