UEB 41811 Apple Tree Cultivar Scab Resistance and Growth
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Solution Overview
Problem
Existing apple tree varieties lack resistance to scab disease and optimal growth characteristics such as columnar tree type and medium to late ripening, which are desirable for dessert apples with good eating quality.
Innovation Solution
The development of the new apple tree cultivar 'UEB 41811', resulting from a cross between 'Gold Bohemia' and 'Moonlight', exhibits Vf-resistance against scab, columnar tree growth, weak tree vigor, and medium to late ripening, with characteristics like conical fruit shape, greenish-yellow skin, and very good eating qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If apple tree varieties are developed for dessert quality and columnar growth type, then eating quality and growth characteristics are improved, but resistance to scab disease is lost
Solution Approach 1:
The patent combines multiple desirable traits from different parent varieties into a single cultivar. The cross between 'Gold Bohemia' (providing yellow overcolor, medium-late ripening, dessert quality) and 'Moonlight' (providing Vf scab resistance, columnar growth type) merges these previously separate characteristics into the new variety 'UEB 41811', which simultaneously exhibits all four traits.
2Productivity
If apple tree varieties are developed for strong tree vigor, then productivity is improved, but tree control and compact growth are worsened
Solution Approach 1:
The new variety exhibits moderate tree vigor, which is an optimized parameter between the strong vigor of 'Gold Bohemia' and the weaker vigor needed for columnar growth control. This parameter change allows the tree to maintain sufficient productivity while achieving the compact, controllable columnar growth form with very short internodes.
3Loss of time
If apple tree varieties are developed for early ripening, then harvest time is improved, but eating quality and storage characteristics are worsened
Solution Approach 1:
The variety is designed with medium-to-late ripening characteristics, optimizing the ripening time parameter to balance harvest timing with fruit quality development. This allows sufficient time for the accumulation of sugars and flavor compounds that contribute to very good eating qualities, while still providing a practical harvest window for commercial and home production.
Data Source
AI summary
A new and distinct Malus domestica (Borkh.) medium to late ripening, dessert variety that exhibits a columnar tree growth type, V.sub.f-resistance against scab, and yellow fruits having a very good taste that are suitable for eating immediately or shortly after harvesting. The new variety is preferable for home apple growing as solitary trees or in groups to function as hedges.