MINNB42 Apple Cultivar Red Skin Coloration Climate Adaptability
Solution Overview
Problem
Existing apple tree cultivars like 'Honeycrisp' struggle to produce well-colored fruit in less conducive climates, and they have limitations in disease resistance, storage life, and texture.
Innovation Solution
The new cultivar 'MINNB42' is developed, characterized by its ability to produce deeply colored red fruit skin, improved disease resistance, crisper texture, and longer storage life, achieved through asexual propagation and observed in multiple trials across different locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 'Honeycrisp' apple trees are grown in less conducive climates (such as southern Pennsylvania and southern New York), then the trees can be cultivated in diverse geographic locations, but the fruit skin coloration is poor and does not develop deeply colored red appearance
Solution Approach 1:
The patent describes a branch mutation that naturally altered the fruit skin coloration parameters of the apple tree. The mutated branch 'MINNB42' developed the ability to produce deeply colored red fruit skin in climates where parent 'Honeycrisp' trees fail to do so, representing a change in the physiological parameters of fruit color development
Solution Approach 2:
The invention isolates and propagates a specific local mutation from a single branch of the parent tree. By asexually propagating only the mutated branch tissue, the patent creates a cultivar with localized improved quality (red skin coloration) while maintaining the overall 'Honeycrisp' characteristics
2Reliability
If apple trees are bred for disease resistance, then resistance to apple scab improves, but other desirable traits such as fruit texture and storage life may be compromised
Solution Approach 1:
The patent utilizes a natural mutation that occurred in the parent tree, which already possessed the desired fruit quality traits. The mutation spontaneously conferred apple scab resistance without requiring artificial breeding interventions that might compromise fruit texture or storage life. The tree essentially self-modified to gain disease resistance while preserving its excellent fruit qualities
3Loss of time
If apple varieties are selected for early ripening, then harvest time is reduced, but storage life is shortened and market availability is limited
Solution Approach 1:
The mutated cultivar 'MINNB42' exhibits altered ripening parameters compared to parent 'Honeycrisp'. The fruit ripens 2 to 3 weeks later but achieves a storage life of 6 to 7 months, representing a beneficial change in the time-related parameters of fruit development and post-harvest durability
Data Source
AI summary
A new cultivar of apple tree, ‘MINNB42’, that is characterized by its fruit that is distinct in its ability to develop deeply colored red fruit skin in climates (such as southern Pennsylvania and southern New York) that are not conducive to producing well-colored ‘Honeycrisp’ fruit, its fruit with a diameter of 7 to 8.4 cm, its fruit with a texture that is very crisp when eaten, its fruit with skin that is relatively thin and easy to penetrate when eaten, its fruit with a flavor that is sub-acid, its moderate tree growth rate, and its cold hardness in U.S.D.A. Zone 4.