Pieris Cabernet Cultivar Breeding for Compact Habit and Flower Color
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Solution Overview
Problem
There is a need for a new cultivar of Pieris japonica that exhibits a compact and freely-branching habit with stable and attractive flower color, as well as good garden performance, which existing cultivars do not consistently provide.
Innovation Solution
A new cultivar, 'Cabernet', was developed through planned breeding, resulting in plants with a compact habit, freely branching structure, greyed red to green leaves, horizontal to drooping inflorescences, late flowering, numerous deep red-purple flowers, and good garden performance, distinguishing it from its parent cultivars and comparable varieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing Pieris cultivars are used, then basic flowering function is provided, but compact habit and stable attractive flower color are not consistently achieved
Solution Approach 1:
The patent applies parameter changes by selecting and fixing specific genetic parameters through controlled cross-pollination between 'Reversal' and 'Valley Valentine' parents. The breeding program targeted specific parameters including plant habit compactness, flower color stability (deep red-purple), and branching patterns, resulting in the 'Cabernet' cultivar that consistently exhibits these desired traits across generations.
2Productivity
If existing Pieris cultivars are used, then flowering function is provided, but freely-branching habit with good garden performance is not achieved
Solution Approach 1:
The breeding program changed the parameter of branching behavior by selecting for freely-branching habits in the progeny. The 'Cabernet' cultivar was specifically bred to exhibit multiple lateral branches per inflorescence position, improving both the freely-branching habit and overall garden performance compared to parent cultivars.
3Duration of action of moving object
If existing Pieris cultivars are used, then basic ornamental value is provided, but unique leaf coloration and extended flowering duration are not achieved
Solution Approach 1:
The patent changed the parameter of flowering duration by selecting progeny that flowered later in the season and maintained blooms for extended periods. The 'Cabernet' cultivar exhibits late flowering response with numerous deep red-purple flowers that last longer than parent cultivars. The leaf color parameter was also changed to produce greyed red new leaves that mature to green, adding ornamental complexity without compromising hardiness.
Data Source
AI summary
A new and distinct cultivar of Pieris plant named ‘Cabernet’, characterized by its compact plant habit; freely branching habit; leaves that are initially greyed red in color and with development become green in color; inflorescences that are horizontal to drooping in aspect; relatively late flowering response; numerous deep red purple-colored flowers; and good garden performance.