Peach Tree ‘Krista’ Breeding for Large Fruit and Early Maturity
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Solution Overview
Problem
Existing peach tree varieties lack a cultivar that combines large fruit size, early maturity, good flavor, and robust growth characteristics, along with reliable fruit production and handling qualities.
Innovation Solution
The development of a new peach tree variety 'Krista' (Prunus persica) through asexual reproduction, which is a cross between proprietary selections '54ZH822' and '170LX160', exhibiting larger fruit size and earlier maturity compared to its parents and other commercial varieties, with vigorous growth and regular fruit bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing peach tree varieties are used, then they have established fruit production, but they lack the combination of large fruit size, early maturity, and robust growth characteristics
Solution Approach 1:
The patent applies parameter changes by creating a new peach variety with modified genetic parameters that result in larger fruit size (17-32 days earlier maturity than parents), altered growth vigor, and changed fruit characteristics (clingstone vs freestone). This resolves the contradiction by simultaneously improving productivity parameters while maintaining adaptability through controlled breeding.
Solution Approach 2:
The patent employs composite materials principle by crossing two different proprietary peach selections ('54ZH822' and '170LX160') to create a hybrid variety that combines desirable traits from both parents. This genetic composition allows the new variety to achieve large fruit size and early maturity while maintaining robust growth and reliable production.
2Volume of moving object
If peach varieties with large fruit size are selected, then fruit size increases, but handling and shipping quality may be compromised
Solution Approach 1:
The patent changes the parameter of fruit firmness and skin characteristics in the new variety to maintain handling and shipping quality despite increased fruit size. The 'Krista' variety produces large fruits (17-32 days earlier maturity) that retain adequate firmness and skin integrity for commercial handling, resolving the contradiction between size and reliability.
3Loss of time
If early maturity is achieved through breeding, then maturity time decreases, but fruit size may be reduced
Solution Approach 1:
The patent achieves a breakthrough parameter change where the new variety matures 17-32 days earlier than parent varieties while simultaneously producing larger fruit. This resolves the traditional trade-off between maturity time and fruit size through selective breeding that decouples these two parameters.
Solution Approach 2:
By combining genetic material from two proprietary selections with different maturity and size characteristics, the patent creates a hybrid that achieves both early maturity and large fruit size, overcoming the limitations of individual parent varieties.
Data Source
AI summary
A new and distinct variety of peach tree (Prunus persica). 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 growth of tree.2. Regular and productive bearer of large size fruit.3. Fruit with an attractive dark red skin color.4. Fruit with firm, yellow flesh.5. Fruit with good flavor and eating quality.