RES 19-56 Mandarin Cultivar Clusters and HLB Resistance
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Solution Overview
Problem
There is a need for a new mandarin cultivar that is compact, precocious, and capable of producing large clusters of seedless, easy-to-peel fruit with good flavor and early maturity, while also being resistant to diseases such as Citrus huanglongbing (HLB).
Innovation Solution
The new mandarin cultivar 'RES 19-56' is developed through a cross between 'Daisy' and 'Mukaku Kishu' mandarin hybrids, resulting in a compact tree that produces clusters of up to 15 seedless fruits, which are easy to peel and have good flavor. This cultivar exhibits precocious fruiting, early maturity, and has shown resistance to HLB in field-grown trees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If seedless mandarin hybrids are developed, then fruit seedlessness and ease of peeling are improved, but fruit set and cluster formation deteriorate
Solution Approach 1:
The patent applies parameter changes by selecting and breeding for specific genetic traits that alter fruit development parameters. The 'RES 19-56' cultivar exhibits parthenocarpic fruit set capability, which changes the reproductive parameter from requiring pollination to developing fruit without fertilization. This genetic parameter change enables both seedlessness and maintained fruit set, resolving the contradiction between ease of peeling (seedless trait) and productivity (fruit set).
2Loss of time
If early maturity is achieved, then harvest time is improved, but fruit quality and color development may deteriorate
Solution Approach 1:
The patent utilizes parameter changes through genetic selection to alter the maturity timeline of the cultivar. 'RES 19-56' was bred to mature early (September-November harvest) while maintaining quality parameters including Brix 9.9, acidity 0.6, and excellent color development. The genetic parameters control both the speed of maturation and the quality accumulation, allowing early harvest without sacrificing fruit quality.
Solution Approach 2:
The patent employs feedback mechanisms in the breeding process, where fruit quality parameters (Brix, acidity, color, flavor) are continuously measured and used to select superior plants for the next generation. This feedback loop ensures that early maturity selections do not compromise quality, as only those early-maturing plants that also maintain high quality traits are propagated.
3Volume of moving object
If compact tree structure is selected, then space utilization is improved, but ornamental value and fruit cluster visibility may deteriorate
Solution Approach 1:
The patent applies local quality by creating a compact tree structure overall while concentrating fruit production in prominent, highly visible clusters. The 'RES 19-56' cultivar develops dense foliage and compact form for space efficiency, but simultaneously produces large, showy fruit clusters that serve as ornamental features. This local differentiation resolves the contradiction by making the compact structure advantageous while highlighting fruit clusters as decorative elements.
Data Source
AI summary
A new and distinct seedless, easy to peel mandarin hybrid, named ‘RES 19-56’, with a unique clustered fruit bearing habit that can appeal to citrus hobbyists as an ornamental, but that also has shown potential value for premium early season fresh market production by CUPS or other Citrus growers. Has shown the ability to set large numbers of parthenocarpic fruit in the CUPS production system. These clusters sometimes number 15 or more fruit, having many more than fruit per cluster than other seedless mandarin hybrids.