Dafne Raspberry Cultivar Dual-Crop Yield and Low Adherence
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Solution Overview
Problem
There is a need for a red raspberry cultivar that exhibits strong vigor, good fruit color and flavor, easy picking, and the ability to produce two crops per year, with fruits primarily ripening on the current season's cane in autumn, while being resilient to varying temperature conditions and suitable for asexual propagation.
Innovation Solution
The 'Dafne' cultivar, derived from open pollination of 'Amaranta' and an unknown father plant, displays upright canes, glossy strong red firm fruits, and is easily propagated through root cutting, offering two crops annually with excellent storage and shipping qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fruit adheres strongly to the plug, then the fruit remains firm and stable during growth, but the harvesting process becomes difficult and time-consuming
Solution Approach 1:
The patent modifies the adhesive parameters of the fruit-receptacle connection by selecting for reduced adherence strength. This allows the fruit to remain firmly attached during growth and development phases, then be easily harvested when needed, resolving the contradiction between stability during growth and ease of harvesting.
2Productivity
If the plant produces fruit on previous year's cane in summer, then the crop duration is extended, but the primocane productivity and autumn yield are reduced
Solution Approach 1:
The patent establishes a periodic fruiting pattern where the plant alternates between summer cropping on floricane and autumn cropping on primocane. This periodic action ensures high productivity in both seasons while maintaining the ability to produce two crops per year, resolving the contradiction between extended crop duration and primocane productivity.
3Ease of manufacture
If the plant is propagated by suckers in spawn-bed, then the propagation is simple, but the propagation efficiency and uniformity are reduced compared to root cutting
Solution Approach 1:
The patent uses root cutting propagation to create genetically identical copies of the parent plant, ensuring uniformity and stability of cultivar characteristics. This copying method through asexual propagation maintains the exact genetic makeup of the original plant, resolving the contradiction between propagation simplicity and propagation efficiency with uniformity.
4Ease of operation
If the fruit is soft, then the fruit has good mouthfeel and flavor release, but the storage capacity and shipping quality are reduced
Solution Approach 1:
The patent achieves different quality characteristics in different aspects of the fruit: firmness in the overall structure for storage and shipping, while maintaining soft texture and juicy properties in the flesh for good mouthfeel and flavor. This local differentiation of quality attributes resolves the contradiction between storage capacity and flavor quality.
Data Source
AI summary
A new a primocane raspberry cultivar named ‘Dafne’ which produces glossy, strong red firm fruits is disclosed, with berries which are easy to pick due to low adherence to the plug. The new cultivar has the advantages of producing two crops per year, wherein the fruits equally ripen on the current season's cane in autumn and on the previous year's cane in summer.