Campanula Cultivar Breeding for Compact Early-Flowering Violet Plants
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Solution Overview
Problem
There is a need for a new and distinct variety of Campanula that exhibits a semi-upright mounding habit, dense canopy, early flowering, and violet-colored campanulate-shaped flowers, which are not currently available in existing Campanula varieties.
Innovation Solution
The development of a new Campanula variety, 'KLECN23085', resulting from an open cross-pollination between unnamed Campanula portenschlagiana and Campanula poscharskyana varieties, characterized by a semi-upright mounding habit, dense branching, compact growth, and early flowering with violet-colored petals, achieved through vegetative propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Campanula varieties are used, then existing growth habits and flowering characteristics are maintained, but the desired semi-upright mounding habit, dense canopy, early flowering, and violet color are not achieved
Solution Approach 1:
The patent applies parameter changes by creating a new variety with specific morphological parameters (semi-upright mounding habit, compact growth form, dense branching) and physiological parameters (early flowering time, violet petal color) that differ from conventional Campanula varieties. This resolves the contradiction by establishing a new parameter set that achieves the desired growth habit and flowering characteristics while being available as a distinct cultivar.
Solution Approach 2:
The new Campanula variety 'KLECN23085' represents a composite genetic material resulting from controlled cross-breeding between Campanula portenschlagiana and Campanula poscharskyana. This composite genetic background combines desirable traits from both parent species to achieve the unique combination of semi-upright mounding habit, dense canopy, early flowering, and violet coloration not found in either parent or conventional varieties.
2Adaptability or versatility
If cross-breeding is performed to achieve new characteristics, then unique growth habits and flower colors are obtained, but breeding time and development duration are extended
Solution Approach 1:
The patent employs preliminary action by conducting controlled cross-breeding between selected parent varieties (Campanula portenschlagiana and Campanula poscharskyana) before commercial propagation. The breeding program was initiated in 2019 with seed collection in 2020, allowing the new variety to be developed and characterized before market introduction. This advance planning and preliminary breeding work enabled the establishment of a stable, true-to-type variety ready for commercial production.
Solution Approach 2:
Once the desired characteristics were achieved through cross-breeding, the patent applies copying by using vegetative propagation (cuttings) to reproduce the new variety 'KLECN23085' true-to-type. This asexual reproduction method allows rapid multiplication of the selected plant without the time-consuming process of repeated sexual breeding, thereby reducing the time loss while maintaining the unique variety characteristics across generations.
3Stability of the object's composition
If vegetative propagation is used to maintain variety characteristics, then true-to-type reproduction is achieved, but propagation time and rooting duration are required
Solution Approach 1:
The patent applies copying through vegetative propagation using terminal cuttings to reproduce Campanula 'KLECN23085' true-to-type. This method creates genetic copies of the selected plant, ensuring identical inheritance of the semi-upright mounding habit, dense canopy, early flowering, and violet color characteristics. The standardized cutting protocol (10-15 cm length, rooting at 19-21°C for 26-28 days) enables efficient reproduction while maintaining variety fidelity.
Solution Approach 2:
The patent optimizes propagation parameters by controlling cutting conditions (temperature of 19-21°C, humidity, light intensity) to achieve reliable rooting within 26-28 days. These parameter optimizations reduce the propagation time while ensuring high survival rates and true-to-type reproduction, resolving the contradiction between maintaining variety stability and minimizing propagation duration.
Data Source
AI summary
A new Campanula plant particularly distinguished by a semi-upright mounding habit, very high and dense branching with compact behavior, early flowering habit; and Campanulate-shaped flowers with violet colored petals, is disclosed.