MAIA8 Apple Tree Breeding for Ripening and Storage Trade-offs
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Solution Overview
Problem
Existing apple tree varieties face challenges in precocity, fruit quality, and storage longevity, with limited options for varieties that combine early ripening, superior flavor, and extended storage capabilities.
Innovation Solution
The development of the new apple tree variety 'MAIA8', derived from a cross between 'Goldrush' and 'Sweet 16', which exhibits late September ripening, scarlet red skin, improved keeping quality, and unique sweet-tart flavor, while being more precocious and having better storage durability compared to its parents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If apple varieties are bred for early ripening, then harvest time is improved, but storage longevity deteriorates
Solution Approach 1:
The patent applies parameter changes by breeding an apple variety with modified physiological parameters that allow both early ripening and extended storage. The 'MAIA8' variety achieves this through selective breeding that alters the balance between ripening speed and storage durability, creating a new parameter set that resolves the traditional trade-off between these two characteristics.
2Loss of time
If apple varieties are bred for precocity, then fruit setting time is improved, but fruit quality deteriorates
Solution Approach 1:
The patent uses parameter changes through breeding to simultaneously improve precocity and maintain fruit quality. The 'MAIA8' variety was selected from a population based on superior performance in both early fruit setting and quality attributes, indicating that the breeding process successfully modified genetic parameters to overcome the traditional quality-precocity trade-off.
3Duration of action of stationary object
If apple varieties are bred for extended storage, then storage window is improved, but ripening time deteriorates
Solution Approach 1:
The patent applies parameter changes by breeding apples with altered storage physiology. The 'MAIA8' variety demonstrates extended storage capability (10 weeks at 35°F) combined with late-September ripening, achieved through selective breeding that modifies the physiological parameters governing both ripening rate and storage longevity, breaking the inverse relationship between these traits.
Data Source
AI summary
A new and distinct variety of apple tree was identified from a population of seedlings derived from a cross of ‘Goldrush’ and ‘Sweet 16’. The new variety, named ‘MAIA8’, is distinct from ‘Goldrush’ as ‘MAIA8’ ripens late-September, 5 weeks before ‘Goldrush’. Unlike ‘Goldrush’, ‘MAIA8’ has scarlet red skin (R.H.S. Colour Chart Red-Purple Group 60B). While ‘Goldrush’ will keep for more than 20 weeks in normal 35° F. storage, ‘MAIA8’ will only keep for approximately 10 weeks in normal 35° F. storage. ‘MAIA8’ is distinct from ‘Sweet 16’ as ‘MAIA8’ is much more precocious, setting fruit in the first year of planting. ‘Sweet 16’ typically does not set fruit until 2 years after planting. The fruit of ‘MAIA8’ adheres to the tree for approximately 6-7 weeks past fruit maturity, while ‘Sweet 16’ fruit will abscise from the tree within 2 weeks of maturity. ‘MAIA8’ fruit are medium sized, crisp, with unique and complex sweet-tart flavor with peach, pear, and strawberry flavor tones.