Pia41 Apple Tree Genetic Stability and Disease Resistance
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Solution Overview
Problem
There is a need for a new apple tree variety that retains its distinctive characteristics across different environmental conditions and maintains its genetic stability through asexual propagation, as existing varieties may exhibit phenotypic variations without genotype changes.
Innovation Solution
The development of a new apple tree variety, 'Pia41', which is a cross between an unnamed Malus domestica variety and 'Honeycrisp', characterized by a flat shape and light green skin that turns yellow when overripe, exhibiting improved scab resistance and decreased susceptibility to powdery mildew, while maintaining its traits through successive asexual propagations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new apple tree variety is developed through crossbreeding, then desirable traits such as disease resistance and fruit quality can be improved, but phenotypic variations may occur due to environmental conditions affecting the expression of traits
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific genetic parameters through controlled crossbreeding. The variety 'Pia41' was developed by crossing a selected male parent with 'Honeycrisp' female parent, and through multiple asexual propagations (cuttings, grafts), the genetic parameters were fixed to ensure consistent expression of disease resistance traits while maintaining phenotypic stability across different environments.
Solution Approach 2:
The patent uses copying through asexual propagation methods to preserve the desired traits. By producing multiple clones through cuttings and grafts, the variety maintains identical genetic material and phenotypic characteristics, ensuring that the disease resistance and fruit quality traits are replicated faithfully without the variation introduced by sexual reproduction.
2Stability of the object's composition
If asexual propagation is used to maintain variety characteristics, then genetic stability is improved, but phenotypic variations may still occur due to environmental influences
Solution Approach 1:
The patent employs copying through asexual propagation to maintain genetic stability. The variety 'Pia41' was propagated through cuttings and grafts, creating genetic copies that preserve the parent's DNA and traits. This ensures genetic stability while the controlled breeding process ensured phenotypic consistency.
Solution Approach 2:
The patent applies feedback through systematic evaluation and selection. The male parent was carefully selected based on desired traits, and the crossing program was designed to produce offspring with stable phenotypes. Environmental variations were monitored and accounted for in the breeding program, ensuring that the expressed traits were reliable indicators of genetic quality.
3Duration of action of stationary object
If fruit keeping quality is improved through variety selection, then storage duration is extended, but disease susceptibility may increase in certain environmental conditions
Solution Approach 1:
The patent applies parameter changes by selecting genetic parameters that simultaneously improve keeping quality and disease resistance. The variety 'Pia41' was developed through controlled crossing and selection, fixing genetic parameters that confer both long storage duration and resistance to scab and powdery mildew, eliminating the trade-off between these traits.
Data Source
AI summary
A new and distinct Malus domestica variety is provided that produces large apples having a light green fruit skin color, desirable eating characteristics, and long keeping duration.