Himari Cherry Tree Resolving Cross-Incompatibility and Fruit Quality
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Solution Overview
Problem
Current cherry tree varieties in Hokkaido, Japan, such as 'Nanyo' and 'Sato Nishiki', face issues with cross-incompatibility, unstable fruit production, and inferior fruit quality, including difficulty in skin coloration and soft flesh.
Innovation Solution
The development of the 'Himari' cherry tree variety, which is the result of artificial crossing between 'Nanyo' and 'Benitemari', offering improved characteristics such as large size, good skin coloration, firm flesh, and excellent eating quality, along with cross-compatibility with most cultivated varieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If artificial crossing between 'Nanyo' and 'Benitemari' is performed to improve fruit quality and size, then fruit firmness and skin coloration are improved, but cross-incompatibility issues persist among cultivated varieties
Solution Approach 1:
The patent changes the genetic parameter (S-allele composition) by performing artificial crossing between 'Nanyo' (S3S6) and 'Benitemari' (S1S6) to produce 'Himari' (S1S3). This parameter change in the genetic composition resolves the cross-incompatibility issue while maintaining improved fruit quality characteristics including firmness and skin coloration.
2Volume of moving object
If existing varieties like 'Nanyo' are used for large fruit size, then fruit size is improved, but skin coloration and firmness deteriorate
Solution Approach 1:
The patent merges the desirable traits from two parent varieties: 'Nanyo' contributes large fruit size, while 'Benitemari' contributes good skin coloration and firm flesh. The resulting 'Himari' variety combines these traits, achieving both large fruit size and improved skin coloration and firmness that neither parent alone possesses.
3Productivity
If 'Nanyo' and 'Sato Nishiki' are cultivated together for productivity, then fruit production is maintained, but cross-incompatibility causes unstable fruit setting
Solution Approach 1:
The patent introduces 'Himari' as an intermediary variety with S1S3 genotype that is cross-compatible with both 'Nanyo' (S3S6) and 'Sato Nishiki' (S3S6). This intermediary variety can serve as a pollinator that bridges the incompatibility gap, enabling stable fruit setting when cultivated with these varieties while maintaining high productivity.
Data Source
AI summary
‘Himari’ is new cherry tree variety having excellent fruit-setting property and cold hardiness, a large fruit size, and large productivity. ‘Himari’ can be distinguished from similar varieties by its dark red color, medium to firm fruit, small stone size and large fruit size.