Spiraea 'DAVCOP01' Cultivar Breeding for Compact Habit and Mildew Resistance
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Solution Overview
Problem
There is a need for a Spiraea cultivar that combines desirable horticultural characteristics such as compact growth, unique foliage coloration, and resistance to powdery mildew, which are not adequately met by existing Spiraea varieties like Spiraea 'Goldflame' or the parental varieties Spiraea japonica 'Baicarol' and Spiraea bumalda 'Denistar'.
Innovation Solution
The development of a new Spiraea hybrid, 'DAVCOP01', which is a cross between Spiraea japonica 'Baicarol' and Spiraea bumalda 'Denistar', exhibiting copper-colored emerging foliage, bright yellow-green mature foliage, a compact and rounded plant habit, and some resistance to powdery mildew, achieved through controlled breeding and asexual propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If Spiraea 'Goldflame' is used, then foliage color is yellow-green, but plant habit is not compact and rounded
Solution Approach 1:
The patent combines the compact, rounded plant habit from Spiraea bumalda with the yellow-green foliage coloration from Spiraea japonica through controlled crossbreeding, creating a cultivar that integrates both desirable traits into a single plant form
Solution Approach 2:
The patent emphasizes the copper-colored emerging foliage as a distinctive local characteristic that sets the new cultivar apart from both parents and commercial varieties, creating a unique visual feature in specific parts of the plant
2Ease of manufacture
If Spiraea japonica 'Baicarol' is used, then foliage color is light yellow-green, but emerging foliage coloration is not copper
Solution Approach 1:
The patent uses Spiraea bumalda as an intermediary parent that contributes both the compact growth habit and powdery mildew resistance, mediating between the yellow-green foliage trait from Spiraea japonica and the desired copper foliage and compact form
3Shape
If Spiraea bumalda 'Denistar' is used, then plant habit is compact, but foliage color is green not yellow-green
Solution Approach 1:
The patent changes the foliage color parameter from green to yellow-green to copper by crossing with Spiraea japonica, while maintaining the compact plant habit parameter through the influence of Spiraea bumalda genetics
4Object-generated harmful factors
If new Spiraea hybrid is developed, then distinctive characteristics are achieved, but breeding and propagation complexity increases
Solution Approach 1:
The patent performs preliminary controlled crossbreeding in a research setting before commercial propagation, establishing the desired genetic combination and disease resistance traits in advance through systematic breeding protocols
Data Source
AI summary
‘DAVCOP01’ is a new cultivar of hybrid Spiraea with distinctive copper emerging foliage. Plants are compact and attractively rounded. Summer foliage is bright yellow-green, this bright coloration is maintained throughout the Summer. The new variety is a Spiraea normally produced as an outdoor garden or container plant.