Phlox Appottpu Compact Habit Breeding
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Solution Overview
Problem
There is a need for new compact and vigorous Phlox plants with numerous small flowers that can thrive under various environmental conditions and cultural practices, as existing varieties may not consistently meet these criteria.
Innovation Solution
A new cultivar of Phlox paniculata, 'Appottpu', was developed through planned breeding, exhibiting a broadly upright and compact growth habit, numerous small purple-violet flowers, long flowering period, and good garden performance, distinguished by its unique characteristics such as flower color, vigor, and flower size compared to its parents and other varieties like 'Purple Kiss'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If existing Phlox varieties are used, then they may have large flowers or vigorous growth, but they do not consistently provide compact habit with numerous small flowers
Solution Approach 1:
The patent applies parameter changes by selecting and breeding for specific quantitative traits: increasing flower number while simultaneously reducing individual flower size. The new cultivar 'Appottpu' produces numerous small flowers (diameter 2.0-3.0 cm) compared to larger flowers in parent varieties, achieving a shift in the size-quantity parameter relationship through controlled breeding programs.
2Strength
If existing Phlox varieties are used, then they may have vigorous growth, but they do not consistently maintain compact plant habit
Solution Approach 1:
The patent resolves this contradiction by changing the growth parameter profile of the cultivar. 'Appottpu' exhibits compact plant habit with controlled height (30-40 cm) and width (30-40 cm) while maintaining vigorous flowering performance. This represents a parameter change from the tall, spreading habit of parent varieties to a compact, bushy form that retains flowering vigor.
3Adaptability or versatility
If environmental conditions vary, then phenotype may change, but genotype should remain stable
Solution Approach 1:
The patent applies this principle by inverting the typical breeding approach: instead of selecting for phenotypic uniformity across environments, the breeder selected a plant that exhibited desirable compact habit and flowering characteristics in the specific test environment, then propagated it asexually to fix those traits. The F2/3 plant 047-11-K112-01 was selected for its compact growth and numerous small flowers, and these traits are now stable in the propagated cultivar.
4Reliability
If new breeding programs are conducted to create compact vigorous plants with numerous small flowers, then new cultivars with improved traits can be developed, but breeding time and resources are required
Solution Approach 1:
The patent demonstrates preliminary action through the systematic breeding program that began with specific parental selections (code 047-11-K112-01 and code 9076-02) crossed in August 2012. The breeder performed preliminary selection of parent plants with desired traits, conducted controlled cross-pollination, and systematically evaluated progeny to identify the superior F2/3 plant. This preliminary, structured approach led to the development of 'Appottpu' with reliable garden performance.
Data Source
AI summary
A new and distinct cultivar of Phlox plant named ‘Appottpu’, characterized by its broadly upright and relatively compact plant habit; freely flowering habit, numerous small purple violet-colored flowers; long flowering period; and good garden performance.