Seedless Mandarin Variety With Stable Morphology for Fruit Production
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Solution Overview
Problem
Existing mandarin varieties lack distinct and stable characteristics for efficient fruit production, particularly in terms of leaf and flower morphology, spine density, and petiole length, making them difficult to distinguish and manage.
Innovation Solution
Development of a new mandarin variety 'Mikanken15' through asexual reproduction, characterized by unique leaf blade ratio, short petiole length, and sparse spine density, differentiated from its parents 'HAREHIME' and 'SEINANNOHIKARI', with specific botanical features and fruit characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing mandarin varieties are used, then cultivation is simple, but distinct and stable characteristics for efficient fruit production are lacking
Solution Approach 1:
The patent applies parameter changes by selecting and fixing specific morphological parameters (leaf blade ratio length/width, petiole length, spine density) to create a new variety with distinct and stable characteristics. The new variety 'Mikanken15' exhibits specific parameter values: leaf blade ratio length/width of 2.0, petiole length of 1.3 cm, and absent or sparse spine density, which differ from parent varieties and provide reliable identification and management characteristics while maintaining high fruit productivity.
2Adaptability or versatility
If parent varieties with different characteristics are crossed, then genetic diversity is improved, but difficulty in distinguishing and managing the new variety increases
Solution Approach 1:
The patent applies local quality by emphasizing specific local characteristics (leaf blade shape, petiole length, spine density) that differentiate the new variety from its parents. Rather than considering all traits equally, the patent focuses on these particular morphological features as key identification markers, making the new variety easily distinguishable while preserving beneficial genetic diversity from both parent varieties.
3Stability of the object's composition
If selection and breeding processes are extended, then variety stability is improved, but breeding time increases
Solution Approach 1:
The patent applies preliminary action by conducting systematic selection and evaluation of breeding lines at multiple stages (primary selection in 2012, secondary selection in 2012, and DUS confirmation in 2024). This structured approach with predetermined selection criteria for key morphological traits allows for efficient progression through breeding stages, achieving variety stability without excessive time delay by preparing and evaluating multiple candidate lines simultaneously.
Data Source
AI summary
A new variety of Citrus plant named ‘Mikanken15’ that has dark orange fruit color, without seeds, high juiciness, orange-like flavor, ease of peeling the fruit by hand, good appearance, and good tasting qualities.