Hydrangea Bailmacseven Dark Purple Foliage Color Retention
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Solution Overview
Problem
Existing Hydrangea macrophylla cultivars lack dark foliage colors that retain coloration throughout the growing season, particularly in hot summer climates, and do not exhibit the desired mophead flowerheads with consistent red-pink sterile sepals and creamy white centers.
Innovation Solution
The development of the 'Bailmacseven' cultivar, which results from a controlled cross between proprietary plants, featuring dark purple new growth foliage, red-pink inflorescences with creamy white centers, and a heavy blooming habit, achieved through asexual propagation by softwood stem cuttings, ensuring stable and true-to-type reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If existing Hydrangea macrophylla cultivars are grown in hot summer climates, then they can survive the growing season, but their foliage coloration is lost and does not remain dark throughout the season
Solution Approach 1:
The patent applies parameter changes by selecting and breeding plants with specific genetic characteristics that maintain dark foliage coloration at higher temperatures. The 'Bailmacseven' cultivar was developed through controlled crossing and selection to possess thermal stability in its anthocyanin pigment production, allowing it to retain dark purple foliage color throughout the summer growing season unlike existing cultivars that fade to green in hot weather.
2Duration of action of stationary object
If existing Hydrangea cultivars are bred for dark foliage colors, then they may achieve dark green or purple highlights, but they do not maintain consistent dark coloration throughout the entire growing season
Solution Approach 1:
The breeding program systematically changed the genetic parameters controlling foliage color stability. Through multiple generations of selection from controlled crosses, the 'Bailmacseven' cultivar was developed with enhanced genetic stability for maintaining dark purple anthocyanin pigmentation throughout the growing season, transforming the unstable color retention of parent plants into consistent season-long dark coloration.
Solution Approach 2:
The breeding process employed feedback mechanisms by evaluating seedlings for dark foliage color retention characteristics and selecting only those that maintained dark coloration through the growing season. This selective feedback loop continued over multiple generations until the 'Bailmacseven' cultivar achieved stable, consistent dark foliage coloration throughout the entire growing season.
3Manufacturing precision
If existing Hydrangea cultivars are bred for mophead flowerheads, then they may produce rounded inflorescences, but they do not exhibit consistent red-pink sterile sepals with creamy white centers
Solution Approach 1:
The breeding program changed the genetic parameters controlling inflorescence sepal coloration. Through controlled crossing of parent plants with desirable color traits and systematic selection of offspring displaying red-pink sterile sepals with creamy white centers, the 'Bailmacseven' cultivar was developed with consistent and reliable inflorescence coloration that distinguishes it from existing cultivars with lighter or less consistent coloring.
Data Source
AI summary
A new cultivar of Hydrangea macrophylla plant named ‘Bailmacseven’ that is characterized by its new foliage growth that is dark purple in color, its dark purple foliage that retains color throughout the summer into fall even in hot summer climates, its inflorescences with sterile sepals that are red-pink in color with creamy white centers (under non-bluing conditions), and its remontant and heavy blooming habit.