Interspecific Pismo Tree Fruit Color and Maturity
Solution Overview
Problem
Existing plum and apricot tree varieties lack desirable fruit characteristics such as attractive skin color, improved flavor, and earlier maturity, as well as efficient fruit production and storage qualities.
Innovation Solution
A new interspecific tree variety, 'PISMO', is developed by crossing Prunus armeniaca with Prunus salicina, using a proprietary seedling selection '11ME474' and '39ZD1053', budded onto 'Nemaguard' Rootstock, resulting in a semi-spreading tree with medium to large orange flesh freestone fruit, exhibiting improved flavor, storage, and shipping qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing plum and apricot tree varieties are used, then traditional fruit characteristics are maintained, but attractive skin color, improved flavor, and earlier maturity are lacking
Solution Approach 1:
The patent uses an interspecific hybrid approach, crossing Prunus salicina (Japanese plum) with Prunus armeniaca (apricot) to create a intermediate variety that combines desirable traits from both parent species. This intermediary breeding strategy produces fruit with attractive orange/red skin color, improved flavor, and earlier maturity while maintaining commercial viability
Solution Approach 2:
The breeding program systematically varies genetic parameters through controlled crosses and selection processes. The patent documents specific genetic combinations that result in changed fruit parameters including skin color (orange/red), flesh color (orange), maturity timing (14 days earlier), and flavor quality, demonstrating deliberate parameter optimization
2Reliability
If new interspecific variety 'PISMO' is developed through crossing and budding, then attractive orange/red skin color and improved flavor are achieved, but breeding and propagation time is extended
Solution Approach 1:
The patent employs preliminary action by performing bud propagation on selected hybrid seedlings before full maturity assessment. The process of budding onto rootstocks and growing in experimental orchards allows early selection and propagation of promising genotypes, accelerating the deployment of improved varieties
Solution Approach 2:
The interspecific hybridization approach skips traditional lengthy breeding cycles by directly crossing species with complementary traits. The patent achieves in one generation the combination of attractive skin color, improved flavor, and earlier maturity that would traditionally require multiple generations of selection and stabilization
3Adaptability or versatility
If open pollinated seedlings are used, then genetic diversity is maintained, but consistent fruit characteristics and commercial viability are reduced
Solution Approach 1:
The patent segments the breeding process into distinct phases: open pollination for initial diversity generation, followed by controlled selection of individual seedlings with desirable traits, and finally asexual propagation through budding to fix and replicate the selected genotype. This segmentation allows both genetic exploration and commercial consistency
Solution Approach 2:
The patent uses asexual propagation through budding to create identical copies of the selected hybrid genotype. This copying process ensures that the desirable fruit characteristics (orange/red skin color, orange flesh, improved flavor, earlier maturity) are uniformly replicated across commercial plantings while maintaining the genetic diversity achieved through the hybridization program
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 a vigorous, semi-spreading growth habit.2. Tree with heavy and regular production of medium to large size fruit.3. Fruit with an attractive orange-red skin color.4. Fruit with good flavor and eating quality and an average Brix of 18.7°.5. Fruit with good handling and shipping quality.