Interspecific Tree Breeding for Early Maturity and Large Fruit Size
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Solution Overview
Problem
Existing interspecific tree varieties lack a combination of desirable traits such as early maturity, larger fruit size, and consistent productivity, along with attractive appearance and good shipping and storage qualities.
Innovation Solution
Development of a new interspecific tree variety resulting from multiple crosses between Prunus salicina and Prunus armeniaca, budded onto 'Nemaguard' Rootstock, exhibiting vigorous growth, regular fruiting, and improved fruit characteristics like red skin color, firm flesh, and enhanced eating quality, with 18 days earlier maturity compared to its immediate seed parent and 18 days later maturity than 'Fall Fiesta' Interspecific.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing interspecific tree varieties are used, then fruit production is maintained, but fruit maturity is later and fruit size is smaller
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a specific seedling (51ME458) that exhibited desirable traits including early maturity (18 days earlier than seed parent) and large fruit size. The variety was developed through controlled breeding parameters and asexual reproduction to fix these improved characteristics, achieving both early maturity and large fruit size simultaneously
2Loss of time
If tree variety is selected for early maturity, then harvesting time is reduced, but fruit quality and shipping durability may be compromised
Solution Approach 1:
The patent applies local quality by developing a variety with differentiated fruit characteristics - the fruit has red skin color, firm flesh, and excellent flavor, with specific attention to the skin-flesh interface quality. The firm flesh texture specifically provides good shipping and storage quality while maintaining early maturity, resolving the contradiction between early harvest and fruit quality
3Stability of the object's composition
If asexual reproduction is used to maintain variety traits, then genetic consistency is achieved, but propagation complexity increases
Solution Approach 1:
The patent applies copying by using asexual reproduction methods (budding, grafting, tissue culture) to create exact genetic copies of the selected parent tree (51ME458). This ensures all propagated plants have identical desirable traits including early maturity and large fruit size, while the standardized propagation protocols keep the complexity manageable
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 with vigorous, upright growth.2. Regular and productive bearer of large size, yellow flesh fruit.3. Fruit with very good flavor and eating quality.4. Fruit with an attractive red skin color.5. Fruit with good handling and storage quality.