Buxus HER2009B03 Cultivar Resistant to Box Blight
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Solution Overview
Problem
Current Buxus cultivars, such as 'Rotundifolia', lack resistance to box blight, limiting their durability and suitability for tall hedges and topiary designs.
Innovation Solution
Development of a new Buxus hybrid cultivar 'HER2009B03' with a unique combination of upright growth habit, fast growth rate, obovate medium green leaves, and resistance to Calonectria pseudonaviculata (box blight), achieved through asexual propagation by stem cuttings and selection from crosses in a breeding program.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Buxus cultivars like 'Rotundifolia' are used for tall hedges and topiary, then they achieve the desired upright growth habit and tall height, but they lack resistance to box blight (Calonectria pseudonaviculata)
Solution Approach 1:
The patent combines multiple desirable traits from different Buxus parent plants into a single hybrid cultivar. The hybridization process merged the upright growth habit and tall height characteristics with disease resistance to Calonectria pseudonaviculata, creating a cultivar that simultaneously achieves structural suitability for hedges and topiary while providing reliable disease resistance that conventional cultivars lack.
2Adaptability or versatility
If existing Buxus cultivars are selected for upright growth habit, then they achieve suitability for tall hedges, but they exhibit susceptibility to box blight
Solution Approach 1:
The patent changes the genetic parameters of the Buxus cultivar through hybridization. By crossing different Buxus parent plants with distinct genetic characteristics, the resulting hybrid cultivar exhibits altered parameters including enhanced disease resistance to Calonectria pseudonaviculata while maintaining the upright growth habit parameter necessary for hedge and topiary applications.
3Stability of the object's composition
If Buxus cultivars are propagated sexually through seeds, then genetic diversity is achieved, but the exact parentage becomes unknown and characteristics may not be stable
Solution Approach 1:
The patent applies preliminary action by first conducting controlled crosses between selected Buxus parent plants and then performing bioassay tests and field examinations on the resulting seedlings before final selection. This preliminary screening process identifies seedlings with desired characteristics and disease resistance, ensuring that the selected cultivar 'HER2009B03' has stable, reproducible traits before asexual propagation begins.
Solution Approach 2:
The patent transitions from sexual reproduction to asexual propagation by stem cuttings to create genetically identical copies of the selected cultivar. This copying process ensures that all propagated plants maintain the exact same genetic composition and characteristics as the original selected plant, providing stability and consistency across multiple generations while eliminating the uncertainty of sexual reproduction.
Data Source
AI summary
A new cultivar of Buxus plant named ‘HER2009B03’ that is characterized by its upright plant habit, its fast growth habit, its leaves that are obovate in shape and medium light green in color, its suitability for use as tall hedges and for shearing into topiary towers, and its resistance to Calonectria pseudonaviculata (box blight).