Calmochi-203 Rice Cultivar Breeding Yield and Quality
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Solution Overview
Problem
Current rice breeding programs face challenges in developing stable, high-yielding rice cultivars that are agronomically sound and resistant to abiotic stresses, diseases, and pests, while also maintaining superior cooking quality and nutritional value.
Innovation Solution
The development of the rice cultivar Calmochi-203, which is a novel, early maturing, semidwarf waxy short grain rice with enhanced traits such as herbicide resistance, disease resistance, and improved nutritional quality, achieved through a combination of traditional breeding and genetic engineering techniques, including the introduction of single genes for desirable traits and regenerable tissue culture methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional breeding methods are used to develop rice cultivars, then genetic stability is maintained, but breeding time and productivity are limited
Solution Approach 1:
The patent applies parameter changes by introducing specific genetic modifications (single gene conversions) into the rice cultivar to achieve herbicide resistance and improved nutritional quality. This allows rapid introduction of desired traits without lengthy traditional breeding processes, while maintaining the stable genetic background of the original cultivar through controlled genetic engineering approaches.
2Productivity
If high yield is pursued through intensive breeding, then grain production increases, but resistance to abiotic stresses and diseases may be compromised
Solution Approach 1:
The patent creates a composite genetic structure by combining the stable genetic background of a traditional rice cultivar with specific introduced genes for stress resistance and nutritional quality. This results in a cultivar that maintains high yield potential while gaining enhanced resistance to abiotic stresses and diseases through the integrated genetic composition.
3Productivity
If long-grain cultivars are grown for higher market prices, then economic value increases, but cooking quality becomes dry and fluffy rather than moist and sticky
Solution Approach 1:
The patent applies local quality by modifying specific genetic traits (waxy gene introduction) in a short-grain rice cultivar to achieve moist and sticky cooking quality, while maintaining the short-grain morphology that commands premium market prices. This targeted genetic modification preserves the desirable local characteristics of short-grain rice rather than converting to long-grain varieties.
Data Source
AI summary
A rice cultivar designated Calmochi-203 is disclosed. The invention relates to the seeds of rice cultivar Calmochi-203, to the plants of rice Calmochi-203 and to methods for producing a rice plant produced by crossing the cultivar Calmochi-203 with itself or another rice variety. The invention further relates to hybrid rice seeds and plants produced by crossing the cultivar Calmochi-203 with another rice cultivar.