Glory Red Interspecific Tree Breeding for Fruit Quality
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Solution Overview
Problem
Existing plum and interspecific tree varieties lack desirable traits such as consistent fruit production, flavor, and storage quality, with limited genetic diversity and maturity timing variability.
Innovation Solution
Development of the 'Glory Red' interspecific tree, resulting from crosses between Prunus salicina, Prunus armeniaca, and Prunus persica, exhibiting vigorous growth, regular bearing, and fruit characteristics like dark red skin, firm flesh, and good storage quality, achieved through asexual reproduction using 'Nemaguard' Rootstock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing plum and intersspecific tree varieties are used, then genetic diversity is maintained, but fruit quality traits such as consistent production, flavor, and storage quality are insufficient
Solution Approach 1:
The patent applies composite breeding by creating intersspecific hybrids that combine multiple Prunus species (Plum × Plumcot × Apricot × Peach). This composite genetic structure integrates desirable traits from different species including consistent bearing, flavor quality, and storage characteristics that individual species lack alone.
Solution Approach 2:
The patent merges multiple parental varieties through controlled crosses to consolidate beneficial traits. The selected parent varieties were crossed to produce offspring that inherit and combine characteristics for reliable production, superior flavor, and improved storage quality from each parent.
2Loss of time
If early maturing varieties are selected, then market timing is improved, but storage and shipping quality deteriorates
Solution Approach 1:
The patent achieves optimal parameter balance by selecting and crossing parent varieties with specific maturity and quality parameters. The resulting 'Glory Red' variety exhibits a maturity timeline and flesh firmness parameter combination that simultaneously enables timely market arrival and sustained storage/shipping quality.
Solution Approach 2:
The patent develops varieties with localized quality characteristics - specifically, the flesh firmness and skin structure are optimized locally within the fruit to maintain integrity during storage and shipping while allowing timely maturity. The firm flesh trait is specifically enhanced in the fruit tissue to address storage requirements.
3Productivity
If vigorous growth varieties are planted, then productivity is improved, but tree size control becomes difficult
Solution Approach 1:
The patent applies local quality control by grafted onto specific rootstocks that regulate tree size locally at the root-graft interface. This allows the scion (fruit-bearing portion) to maintain vigorous productivity while the rootstock constrains overall tree dimensions for manageable orchard operations.
Solution Approach 2:
The patent segments the tree into functionally distinct parts: the rootstock handles size control and anchorage functions, while the scion handles fruit production functions. This segmentation allows independent optimization of each component - vigorous fruit-bearing varieties can be used in the scion without compromising tree size management through rootstock selection.
Data Source
AI summary
A new and distinct variety of interspecific tree. The following features of the tree and its fruit are characterized with the tree budded on ‘Nemaguard’ 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) Vigorous, upright tree growth.2) Heavy and regular bearer of large size fruit.3) Fruit with very good flavor and eating quality.4) Fruit with an attractive dark red skin color.5) Fruit with good handling and shipping quality.6) Fruit with an average Brix of 20.0° and a good balance between acid and sugar.