Navy Lady Shrub Rose Cultivar Breeding for Cold Hardiness
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Solution Overview
Problem
Existing rose cultivars lack hardiness, disease resistance, and extended flowering periods, with limited unique flower colors and forms, making them unsuitable for diverse landscape applications.
Innovation Solution
The development of 'Navy Lady', a new Rosa hybrida cultivar, which is the result of controlled breeding for enhanced hardiness, disease resistance, and unique flower characteristics, featuring semi-double dark red flowers, velvety petals, light rose scent, and a repeat blooming habit, with good resistance to powdery mildew and rust, and cold hardiness to at least U.S.D.A. Zone 4.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rose cultivars are used, then they can be grown in gardens, but they lack hardiness and disease resistance
Solution Approach 1:
The patent applies parameter changes by selectively breeding rose plants to modify key parameters including cold hardiness (achieved through Zone 4 hardiness), disease resistance (resistance to powdery mildew and rust), and flowering characteristics (repeat blooming habit). This systematic modification of biological parameters creates a cultivar that simultaneously achieves hardiness and landscape versatility.
Solution Approach 2:
The 'Navy Lady' cultivar represents a composite genetic material resulting from controlled cross-breeding between 'Fourth of July' and 'Astrid Lindgren'. This composite approach combines desirable traits from both parent cultivars, including hardiness, disease resistance, and unique flower characteristics, into a single integrated plant variety.
2Adaptability or versatility
If conventional rose cultivars are used, then they can be propagated, but they have limited unique flower colors and forms
Solution Approach 1:
The patent applies local quality by developing distinct characteristics in specific parts of the plant: dark red velvety petals with semi-double flower form, light rose scent, and repeat blooming habit. Each trait is optimized independently while maintaining overall plant stability, allowing unique flower colors and forms without sacrificing characteristic consistency.
Solution Approach 2:
The breeding program employed feedback mechanisms by evaluating seedlings over multiple years (2004-2008) and selecting those that consistently demonstrated desired traits. This iterative selection process ensured that the unique flower characteristics were stable and reproducible before establishing the cultivar.
3Duration of action of moving object
If existing rose cultivars are used, then they can bloom, but they have short flowering periods
Solution Approach 1:
The 'Navy Lady' cultivar exhibits periodic action through its repeat blooming habit, producing flowers in multiple cycles throughout the growing season rather than a single flush. This periodic flowering pattern extends the total duration of action (flowering period) while maintaining high productivity through repeated blooming cycles.
Data Source
AI summary
A new cultivar of shrub rose, ‘Navy Lady’, characterized by its small, compact, and uniform plant habit, its lightly fragrant semi-double flowers that are deep red in color opening from buds that are very dark red in color with its petals exhibiting a velvety texture, its repeat blooming habit, its medium to dark green semi-glossy foliage with good resistance to powdery mildew and rust, its vigorous growth habit, its ability to be readily propagated on its own roots, and its cold hardiness at least to U.S.D.A. Zone 4.