Autumn Bill Interspecific Tree Breeding for Fruit Quality
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Solution Overview
Problem
Existing interspecific tree varieties lack a combination of vigorous growth, consistent fruit production, and desirable fruit characteristics such as attractive skin color, firm flesh, and balanced flavor, particularly in terms of maturity and flesh color.
Innovation Solution
A new interspecific tree variety, 'Autumn Bill', is developed through crosses between Prunus salicina, Prunus armeniaca, and Prunus persica, exhibiting vigorous growth, regular fruit bearing, and large, dark red fruit with firm yellow flesh, budded onto 'Nemaguard' Rootstock for enhanced fruit production and commercialization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing interspecific tree varieties are used, then fruit production is achieved, but the fruit lacks desirable characteristics such as attractive skin color, firm flesh, and balanced flavor
Solution Approach 1:
The patent combines three different Prunus species (Plum, Apricot, and Peach) through multiple generations of cross-breeding to create a single interspecific variety that integrates desirable traits from each parent species, including vigorous growth from Plum, fruit quality from Apricot, and flesh characteristics from Peach
Solution Approach 2:
The variety represents a composite genetic material resulting from the integration of three distinct genetic lineages, creating a new genetic composition that exhibits superior and more consistent fruit characteristics than any single parent species
2Loss of time
If early maturing varieties are selected, then fruit production timing is advanced, but the fruit lacks yellow flesh color and has inferior eating quality
Solution Approach 1:
The breeding program selectively modified the maturity parameter and flesh color parameter through controlled cross-breeding, achieving a variety that matures later (45-74 days after parents) but produces fruit with desirable yellow flesh color and superior eating quality that the earlier-maturing parent varieties lacked
3Productivity
If vigorous growth is selected for, then tree productivity is enhanced, but the fruit may lack consistent quality and attractive characteristics
Solution Approach 1:
The breeding program differentiated between tree-level traits (vigorous growth, upright habit) and fruit-level traits (skin color, flesh firmness, flavor), selecting for vigorous growth in the tree while simultaneously selecting for consistent high-quality fruit characteristics, achieving both productivity and quality reliability in the same variety
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. Tree having a vigorous, upright growth habit.2. Tree being a regular and productive bearer of large size, yellow flesh fruit.3. Fruit with very good flavor and eating quality.4. Fruit with an attractive, dark red skin color.5. Fruit with a high degree of soluble solids (Brix) of 18.0°.