Rosa IntRos02 Cultivar Breeding for Compact Form and Unique Color
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Solution Overview
Problem
There is a need for new Rosa varieties with distinct ornamental characteristics for commercial applications, as existing varieties lack specific traits such as unique flower coloration, compact size, and abundant flowering, which are stable across different environmental conditions.
Innovation Solution
The development of the Rosa cultivar 'IntRos02' through planned breeding, combining traits from seed parent Rosa 'B274-02' and pollen parent Rosa 'B390-01', resulting in a peach-colored flower fading to very light purple, compact size, and abundant flowering, with stable reproduction through vegetative cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional Rosa varieties are used for commercial applications, then existing varieties are available, but they lack unique flower coloration, compact size, and abundant flowering
Solution Approach 1:
The patent combines traits from two parent varieties (Rosa 'B274-02' and Rosa 'B390-01') through controlled cross-breeding to produce a new cultivar with merged desirable characteristics: peach-colored flowers fading to light purple, compact size, and abundant flowering. This merging of parental traits resolves the contradiction by creating unique ornamental features while following systematic breeding procedures.
Solution Approach 2:
The breeding program systematically varied breeding parameters including parental selection, crossing timing (April 2004), and selection criteria to achieve the desired flower coloration (peach to light purple fade), compact dimensions, and prolific flowering. These parameter changes enabled the development of distinctive ornamental characteristics that differentiate 'IntRos02' from conventional varieties.
2Reliability
If new Rosa varieties are developed through breeding programs, then unique ornamental characteristics are achieved, but breeding time and resources are required
Solution Approach 1:
The breeding program performed preliminary actions by carefully selecting parent varieties with complementary traits before crossing. The seed parent (Rosa 'B274-02') and pollen parent (Rosa 'B390-01') were pre-characterized for disease resistance, growth habits, and floral traits, enabling more efficient development of reliable cultivars with stable reproduction across generations.
Solution Approach 2:
The breeding program incorporated feedback mechanisms through systematic observation and evaluation of seedling performance. The new cultivar was tested across multiple generations (8 successive generations documented) and environmental conditions to verify stable trait reproduction, allowing refinement of breeding approaches to reduce future development time while maintaining reliability.
3Adaptability or versatility
If Rosa varieties are adapted to different environmental conditions, then broader commercial applicability is achieved, but phenotype variation may occur
Solution Approach 1:
Instead of attempting to prevent all phenotype variation through environmental control, the breeding program inverted the approach by selecting for genetic traits that naturally express consistently across varying environmental conditions. The cultivar was bred to maintain its distinctive peach-to-light-purple flower fade and compact form regardless of temperature, day length, or light intensity variations, achieving stability through genetic selection rather than environmental uniformity.
Data Source
AI summary
A new and distinct Rosa cultivar named ‘IntRos02’ is disclosed, characterized by abundant flowering, compact form and unique flower coloration of peach petals with a red-purple blotch. The new variety is a Rosa, normally produced as an outdoor garden or container plant.