Calibrachoa Cultivar USCALI413-8 Breeding for Uniform Habit and Disease Resistance
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Solution Overview
Problem
Existing Calibrachoa cultivars lack uniform plant habit and attractive flower colors, with variations in environmental conditions affecting phenotype and genotype stability.
Innovation Solution
The development of the Calibrachoa cultivar 'USCALI413-8' through controlled cross-pollination, exhibiting a compact, mounding growth habit and unique orange-colored flowers with red centers, stable across generations via asexual reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If existing Calibrachoa cultivars are grown under varying environmental conditions, then phenotype variation occurs, but genotype stability is compromised
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific genetic parameters through controlled cross-pollination. The breeding program focused on fixing traits such as compact growth habit (parameter: plant height and spread), flower color (parameter: corolla color), and flowering time (parameter: days to first flower) to create a genotype that maintains stability across environmental variations.
Solution Approach 2:
The patent uses asexual reproduction by terminal cuttings to create genetic copies of the selected plant. This copying method ensures that the desired phenotype is exactly replicated across multiple generations without genetic variation, thereby maintaining both genotype stability and phenotype consistency.
2Stability of the object's composition
If Calibrachoa breeding aims for uniform plant habit, then growth uniformity improves, but flower attractiveness may be compromised
Solution Approach 1:
The patent applies local quality by differentiating between two distinct plant regions: the vegetative portion (stem, leaves, overall habit) and the reproductive portion (flowers). The compact, mounding growth habit was selected for the vegetative portion while the flowers were selected for their large size, vibrant color, and attractive form, allowing each region to optimize its local quality independently.
3Loss of time
If Calibrachoa cultivars are selected for early flowering, then time to flower decreases, but flower size may be reduced
Solution Approach 1:
The patent applies partial or excessive action by selecting plants that exhibited an excessive tendency toward early flowering combined with large flower size, which would normally be mutually exclusive. The selected plant flowered in 60-70 days (earlier than many cultivars) while simultaneously producing flowers 2.0-3.0 cm in diameter (larger than typical for early-flowering types), thus achieving both goals through selective pressure on extreme phenotypes.
Data Source
AI summary
A new and distinct cultivar of Calibrachoa plant named ‘USCALI413-8’, characterized by its compact, mounding and outwardly spreading growth habit; numerous orange-colored flowers with red-colored centers; and good garden performance.