Butter Rum Coreopsis Cultivar Breeding for Disease Resistance
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Solution Overview
Problem
Existing Coreopsis cultivars lack long-lived, sturdy, cold-hardy, and floriferous varieties with unique flower colors and forms that do not require vernalization for flowering, and are susceptible to diseases like powdery mildew and leafspot.
Innovation Solution
The development of the 'Butter Rum' Coreopsis cultivar, which is a hybrid resulting from controlled breeding, exhibiting a sturdy habit, nearly sterile inflorescences, resistance to powdery mildew and leafspot, and cold hardiness to at least U.S.D.A. Zone 5, with yellow ray florets and red flushed tips, achieved through asexual propagation by stem cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing Coreopsis cultivars are used, then they can be grown for landscape use, but they lack cold hardiness and are susceptible to diseases like powdery mildew and leafspot
Solution Approach 1:
The patent applies parameter changes by developing a new cultivar with modified genetic parameters that confer cold hardiness to USDA Zone 5 and resistance to powdery mildew and leafspot diseases, transforming the plant's physiological parameters to overcome environmental limitations
Solution Approach 2:
The patent employs composite materials by creating a hybrid cultivar through controlled cross-breeding that combines desirable traits from multiple parent lines, resulting in a composite genetic structure that provides both cold hardiness and disease resistance
2Ease of operation
If existing Coreopsis cultivars are used, then they can produce flowers, but they require vernalization to initiate flowering which extends the growing season requirements
Solution Approach 1:
The patent applies taking out by removing the vernalization requirement from the flowering initiation process through selective breeding, extracting this environmental constraint from the cultivar's developmental requirements to enable flowering without prolonged cold exposure
Solution Approach 2:
The patent changes the physiological parameters of the plant by developing a cultivar with altered photoperiod sensitivity and flowering trigger mechanisms that eliminate the need for vernalization, allowing the plant to flower based on different environmental cues
3Duration of action of stationary object
If existing Coreopsis cultivars are used, then they can be propagated, but they lack sturdy plant habit and long-lived characteristics
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing genetic parameters that control plant architecture, stem strength, and perennial longevity, transforming the plant's structural parameters to achieve a sturdy, long-lived habit suitable for landscape use
Data Source
AI summary
A new cultivar of hybrid Coreopsis plant named ‘Butter Rum’ that is characterized by its sturdy, well-branched plant habit reaching an average of 42 cm in height and 60 cm in width, its floriferous and long blooming season of nearly sterile inflorescences that do not require deadheading; bloom commences in early July and lasts until frost in Kensington, Conn., its medium sized inflorescences with ray florets that are yellow in color with red flushed tips, its near sterility, its resistance to powdery mildew (Podosphaera macularis) and leafspot (Pseudomonas cichorii), and its cold hardiness at least to U.S.D.A. Zone 5a.