Plumcandy XIV Plum Tree Hybridization for Large Fruit and Storage
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Solution Overview
Problem
There is a need for a new and distinct variety of plum tree that is more productive, has improved fruit characteristics, and is suitable for shipping and long-distance storage, addressing the limitations of existing plum varieties in terms of size, color, flavor, and pollination requirements.
Innovation Solution
The development of the 'Plumcandy XIV' plum tree variety, which is a medium-sized, vigorous, and self-unfruitful tree requiring cross-pollination, producing large, nearly black, clingstone fruit with yellow flesh, and exhibiting enhanced productivity and heat tolerance, achieved through hybridization and asexual reproduction using 'Plumsweet VIII' as the seed parent and compatible with 'Nemaguard' rootstock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing plum varieties are used, then they have basic fruit production, but they lack improved fruit size, color, flavor, and productivity
Solution Approach 1:
The patent applies parameter changes by hybridizing different plum varieties to alter key fruit parameters including size (increasing from typical to very large), skin color (developing nearly black coloration), flesh color (yellow), and productivity (very productive). The hybridization process changes the genetic parameters to achieve superior fruit characteristics that meet commercial standards for size, color, and yield.
2Reliability
If self-unfruitful variety is developed, then cross-pollination requirement improves fruit quality, but pollination management complexity increases
Solution Approach 1:
The patent applies self-service through the self-unfruitful characteristic of the plum variety, which naturally requires cross-pollination. This biological trait ensures that the tree cannot set fruit without pollination from another variety, thereby guaranteeing genetic diversity and consistent fruit quality without requiring complex external pollination management systems. The natural biological constraint serves the quality assurance function.
3Productivity
If fruit is developed for long-distance shipping, then shipping quality improves, but storage duration requirements increase
Solution Approach 1:
The patent applies composite materials concept by developing a fruit with multiple protective characteristics combined: firm texture, thick skin, and specific compositional properties that together enable both excellent shipping quality for long-distance transport and extended storage duration of up to 30 days. The fruit combines these seemingly conflicting properties through selective breeding to achieve both immediate shipping performance and long-term storage capability.
Data Source
AI summary
The present invention relates to a plum tree and more particularly to a new and distinct variety broadly characterized by a medium size, vigorous, hardy, and very productive tree. Being self-unfruitful, the present variety requires cross pollination from another plum or interspecific tree that blooms during the mid to late season, such as ‘Plumsweet XV’ interspecific tree (U.S. Plant Pat. No. 23,687). The present variety's abundance of blossoms and moderate pollen production entices strong bee activity to facilitate pollination. The fruit matures under the ecological conditions described during the first week of September, with first picking on Sep. 5, 2017. The fruit is uniform, very large in size, nearly black in skin color, clingstone in type, full yellow in flesh color, firm in texture, juicy, and excellent in flavor.