Interspecific Sweet Pixie Tree Breeding for Fruit Quality
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Solution Overview
Problem
Existing cherry and plum tree varieties lack a combination of desirable traits such as early maturity, superior eating quality, and consistent fruit production, with limited options for interspecific trees that balance plum-like and cherry-like characteristics.
Innovation Solution
An interspecific tree variety derived from a cross between (Prunus salicina×Prunus avium)×Prunus avium, selected for its vigorous growth, regular bearing, and fruit characteristics including yellow-red flesh, excellent flavor, and improved storage and shipping quality, achieved through asexual reproduction using the 'Nemaguard' Rootstock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing cherry and plum tree varieties are used, then fruit production is achieved, but the combination of early maturity, superior eating quality, and consistent fruit production is not obtained
Solution Approach 1:
The patent applies parameter changes by creating a new intersspecific tree variety with modified genetic parameters that simultaneously achieve early maturity (30 days earlier than seed parent), superior eating quality, and consistent regular bearing. The variety [(Plum×Cherry)×Cherry] combines genetic traits from Prunus salicina and Prunus avium to optimize multiple parameters including fruit size, flesh color, and production reliability.
2Productivity
If intersspecific tree varieties are developed to combine plum and cherry characteristics, then fruit size and flavor are improved, but maturity timing becomes later compared to pure cherry varieties
Solution Approach 1:
The patent resolves this contradiction by changing the genetic parameters through intersspecific breeding. The new variety achieves fruit size comparable to or larger than plum varieties while reducing maturity time by 30 days compared to its seed parent, and by 50 days compared to its pollen parent, thus optimizing both size and timing parameters simultaneously.
3Ease of operation
If fruit is allowed to mature fully on the tree, then eating quality is maximized, but storage and shipping quality deteriorates due to softening
Solution Approach 1:
The patent applies parameter changes by developing fruit with modified ripening characteristics. The new variety maintains firm flesh texture and excellent storage quality 3 weeks past maturity, while simultaneously achieving superior eating quality. The flesh color is yellow-red and the fruit holds firm on the tree, allowing optimal picking timing for both quality attributes.
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 fruit.3. Fruit with excellent flavor and eating quality.4. Fruit with good handling and shipping quality.5. Fruit with an average Brix of 20° with a good balance between acid and sugar.6. Fruit with the ability to remain firm on the tree 3 weeks past maturity (shipping ripe).