Double-Flowered Mandevilla Breeding Via Cuttings for Compact Growth
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Solution Overview
Problem
Existing Mandevilla plants, particularly the 'Rita Marie Green' cultivar, face challenges in producing double blooming flowers, are unsuitable for small containers, have uneven leaf veins and hairiness, and require long flowering periods, making them less desirable for horticultural applications.
Innovation Solution
Through extensive vegetative propagation of the 'Cream Pink' cultivar, resulting in the creation of 'Double Pink' and 'Double Red' cultivars with double blooming flowers, suitable for small containers, smooth leaf texture, and earlier flowering periods, utilizing techniques like cutting and bud sports to maintain desired traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If artificial cross-breeding is used to create double blooming Mandevilla varieties, then new varieties can be obtained, but the process is technologically difficult and has very low success rate
Solution Approach 1:
Instead of using difficult artificial cross-breeding to create double blooming varieties, the invention inverts the approach by using vegetative propagation (cuttings) of a single blooming cultivar 'Cream Pink' to obtain double blooming mutants. This reverses the conventional breeding direction and achieves the desired trait through mutation selection rather than complex hybridization.
Solution Approach 2:
The invention allows the plant to naturally produce mutations during vegetative propagation without human intervention in the breeding process. By propagating cuttings and selecting for spontaneous double blooming mutants, the system uses the plant's own genetic variability rather than requiring technologically complex artificial cross-breeding methods.
2Adaptability or versatility
If 'Rita Marie Green' cultivar is used, then double blooming flowers are obtained, but the plant grows as a vigorous vine to large size making it unsuitable for small containers
Solution Approach 1:
The invention applies local quality by selecting and propagating only the specific mutant cutting that exhibits both double blooming flowers and compact growth habit. This creates a locally optimized plant with desired traits in specific regions (flowers and growth habit) rather than requiring the entire species to have these properties.
Solution Approach 2:
The invention changes the growth parameter from vigorous vine (large size) to compact upright growth (small size) while maintaining the double blooming trait. This is achieved by selecting a mutant cutting that naturally exhibits these altered growth parameters and propagating it vegetatively to fix the new growth habit.
3Adaptability or versatility
If 'Rita Marie Green' cultivar is used, then double blooming flowers are obtained, but the leaves have uneven veins and hairiness resulting in poor texture and low appreciation level
Solution Approach 1:
The invention extracts the desired traits (double blooming flowers and smooth leaf texture) from the mutant cutting while leaving behind the unwanted traits of the parent cultivar. By selecting only the cutting that exhibits both double blooming and smooth leaves, the invention separates the desirable characteristics from the undesirable ones.
Solution Approach 2:
The invention changes the leaf texture parameter from uneven and hairy to smooth and glossy by selecting a mutant cutting that naturally exhibits this improved leaf quality. The vegetative propagation then fixes this new leaf texture parameter in all propagated plants.
4Adaptability or versatility
If 'Rita Marie Green' cultivar is used, then double blooming flowers are obtained, but long times are required for flowering after cuttings have been taken
Solution Approach 1:
The invention performs preliminary action by selecting a mutant cutting that already possesses the double blooming trait before propagation. This pre-selection ensures that the propagated plants will flower earlier because the desired trait is already present in the cutting, eliminating the need for lengthy breeding cycles to develop the double blooming characteristic.
Data Source
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AI summary
It is possible to create Mandevilla plants, and especially double blooming Mandevilla plants, which have not been hitherto created. Provided is the Mandevilla plant deposited as Accession No. FERM BP-22460 at the independent administrative International Patent Organism Depositary of the National Institute of Technology and Evaluation (NITE-IPOD), and its progeny.