Rosa hybrida AUSCP17431 Breeding for Bloom Size and Disease Resistance
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Solution Overview
Problem
Current rose cultivars lack large, mid-pink blooms with strong fragrance and suitable growth habits for cut rose production, as well as effective resistance to diseases like powdery mildew, downy mildew, and blackspot.
Innovation Solution
The development of Rosa hybrida shrub 'AUSCP17431' with mid-pink colored, many-petaled blooms, strong stems, and resistance to powdery mildew, downy mildew, and blackspot, achieved through cross-pollination and asexual propagation, distinguishing it from its unnamed parents and similar commercial varieties like 'AUSIMMON'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cross-pollination breeding is performed to combine desirable traits, then bloom size, petal count, and fragrance strength are improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-selecting parent plants with specific desirable traits (large blooms, many petals, strong fragrance) before cross-pollination. The breeding program systematically evaluates multiple generations to accelerate the selection process, reducing the time required to develop cultivars with the target combination of characteristics.
Solution Approach 2:
The patent employs feedback mechanisms through systematic evaluation and comparison of parental and offspring traits. By continuously assessing bloom characteristics, fragrance strength, and growth habits across generations, the breeding program can make informed selections to achieve the desired trait combination more efficiently.
2Reliability
If disease resistance is enhanced through breeding, then reliability against powdery mildew, downy mildew, and blackspot is improved, but genetic complexity increases
Solution Approach 1:
The patent applies local quality by focusing disease resistance breeding on specific traits rather than attempting to optimize all genetic characteristics simultaneously. By selecting for resistance to specific diseases (powdery mildew, downy mildew, blackspot) while maintaining other desirable traits through careful parent selection, the program manages genetic complexity while achieving reliable disease resistance.
3Volume of moving object
If bloom size and petal count are increased, then aesthetic value is improved, but stem strength and growth habit for cut rose production may be compromised
Solution Approach 1:
The patent applies parameter changes by systematically evaluating and selecting for optimal combinations of bloom size, petal count, and stem strength. Through multi-generational breeding and phenotypic selection, the program identifies genetic parameters that allow large, many-petaled blooms to develop on strong stems with growth habits suitable for cut rose production, thereby resolving the trade-off between bloom aesthetics and structural integrity.
Data Source
AI summary
A variety of rose plant of the shrub class, named ‘AUSCP17431’. The ‘AUSCP17431’ is a variety of a cut rose bearing large blooms with a mid-pink color and a strong fragrance.