Royal Hazel Cherry Tree Low Chilling Requirement Breeding
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Solution Overview
Problem
Existing cherry tree varieties face limitations in low chilling requirements, adaptability, and fruit maturity timing, with 'Bing' Cherry and 'Minnie Royal' having higher chilling needs and later maturity, and seed parent '25Z116' having less distinct flavor and later blooming.
Innovation Solution
A new cherry tree variety (Prunus avium) with a low winter chilling requirement of approximately 500 hours at or below 45° F, earlier blooming, and earlier fruit maturity, bred through asexual reproduction using 'Mahaleb' Rootstock, resulting in larger, firmer, and more flavorful fruit with improved adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing cherry tree varieties like 'Bing' Cherry and 'Minnie Royal' are used, then they have established fruit quality and flavor, but they have higher winter chilling requirements and later fruit maturity
Solution Approach 1:
The patent applies parameter changes by breeding a cherry variety with modified physiological parameters - specifically reducing the winter chilling requirement from the typical 800-1000 hours to approximately 500 hours, and advancing the fruit maturity timing by approximately 12 days compared to parent varieties. This is achieved through selective breeding and asexual reproduction to stabilize these new parameter values.
2Adaptability or versatility
If seed parent '25Z116' is used for breeding, then it has low chilling requirement, but it has less distinct flavor and later blooming
Solution Approach 1:
The patent merges the desirable low chilling requirement trait from seed parent '25Z116' with the superior fruit flavor and blooming characteristics from other parent varieties through controlled crossing. The resulting variety combines these traits, achieving both adaptability to low-chilling environments and reliable high-quality fruit production.
3Loss of time
If cherry trees are bred for earlier maturity, then fruit marketability is improved, but fruit firmness and storage quality may be compromised
Solution Approach 1:
The patent achieves parameter changes by simultaneously modifying multiple fruit quality parameters - advancing maturity by 12 days while maintaining or improving fruit firmness through selective breeding. The new variety produces firm fruit that remains firm for 7 days past maturity, demonstrating that early maturity and firmness can be achieved together through proper breeding selection.
Data Source
AI summary
A new and distinct variety of cherry tree. The following features of the tree and its fruit are characterized with the tree budded on ‘Mahaleb’ Rootstock (non-patented), grown on Handford sandy loam soil with Storie Index rating 95, in USDA Hardiness Zone 9, near Modesto, Calif., with standard commercial fruit growing practices, such as pruning, thinning, spraying, irrigation and fertilization. Its novelty consist of the following combination of desirable features:1. A low chilling requirement of approximately 500 hours at or below 45° F.2. Fruit maturing in the early season.3. Fruit with an attractive red skin color.4. Fruit with very good flavor and eating quality.5. The ability of the fruit to remain firm on the tree 7 days past maturity.6. Heavy and regular production of large size fruit.