Grandiflora Rose Radnectar Merging Disease Resistance and Continuous Blooming
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Solution Overview
Problem
The horticultural industry lacks a rose variety that combines attractive bright orange to apricot blossoms, a dense upright growth habit, and excellent disease resistance, particularly against black spot, rust, and mildews, suitable for landscape ornamentation.
Innovation Solution
A new Rosa hybrida Grandiflora rose plant, 'Radnectar', was developed through artificial pollination of 'Harwelcome' and 'Radorg' varieties, exhibiting continuous cup-shaped blossoms, vigorous growth, dark green glossy foliage, and robust disease resistance, suitable for asexual propagation and landscape use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rose varieties are used for landscape ornamentation, then they provide decorative value, but they lack a combination of bright orange to apricot blossoms, dense upright growth habit, and excellent disease resistance
Solution Approach 1:
The patent combines multiple desirable traits from different parent varieties into a single new variety 'Radnectar'. The female parent 'Harwelcome' contributed disease resistance and the male parent 'Radorg' contributed growth habit and flowering characteristics. The resulting variety merges bright orange to apricot single cup-shaped blossoms, dense upright bushy growth habit, and excellent disease resistance against black spot, rust, and mildews into one unified plant that exhibits all three traits simultaneously.
2Illumination intensity
If rose varieties with attractive blossoms are selected, then ornamental value is improved, but disease resistance deteriorates
Solution Approach 1:
The patent merges the attractive blossom characteristics from one parent with the disease resistance traits from another parent. The new variety 'Radnectar' produces abundant single cup-shaped blossoms in bright orange to apricot colors while simultaneously exhibiting excellent resistance to black spot, rust, and mildews, resolving the trade-off between ornamental value and disease resistance.
3Productivity
If rose varieties with vigorous growth are selected, then productivity is improved, but disease susceptibility increases
Solution Approach 1:
The patent combines vigorous growth characteristics with disease resistance by crossing selected parent varieties. The new variety 'Radnectar' exhibits vigorous vegetation and dense upright bushy growth habit while maintaining excellent resistance to common rose diseases including black spot, rust, and mildews, eliminating the inverse relationship between growth vigor and disease resistance.
4Illumination intensity
If single cup-shaped blossoms are produced, then ornamental appeal is improved, but flowering continuity deteriorates
Solution Approach 1:
The patent merges the attractive single cup-shaped blossom form with continuous flowering capability. The new variety 'Radnectar' produces abundant single cup-shaped blossoms in bright orange to apricot colors that bloom substantially continuously throughout the growing season, combining the aesthetic appeal of single flowers with the advantage of extended flowering duration.
Data Source
AI summary
A new and distinct Grandiflora rose plant is provided that abundantly and substantially continuously forms attractive single cup-shaped bright orange to apricot blossoms. The plant exhibits vigorous vegetation and an upright and bushy growth habit. The foliage is ornamental dark green with a glossy finish on the upper surface. The light blossom coloration contrasts nicely with the dark green foliage. The disease resistance is excellent, particularly with respect to black spot, rust and mildews. The plant is well suited for providing attractive ornamentation in in the landscape.