Inbred Rice Line DG263L Yield Stability
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Solution Overview
Problem
Current rice breeding efforts face challenges in developing stable, high-yielding rice cultivars that are agronomically sound and adaptable to various growing conditions, particularly in the southern United States, with existing cultivars showing variability in yield, disease resistance, and cooking properties.
Innovation Solution
The development of the inbred rice line DG263L, a semi-dwarf, early maturing long grain variety (Oryza sativa L.) with specific breeding methods, including pedigree selection, hybrid breeding, and molecular biology techniques, which enhances yield potential, disease resistance, and adaptability across different environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional rice breeding methods are used to develop new cultivars, then genetic diversity is maintained, but yield stability and disease resistance are insufficient
Solution Approach 1:
The breeding program segments the development process into distinct phases: creating inbred lines through repeated selfing to achieve genetic uniformity, then combining these lines in hybrid crosses to exploit heterosis. This segmentation allows systematic improvement of yield stability while maintaining genetic diversity at the population level.
Solution Approach 2:
The patent applies preliminary action by developing and maintaining a library of inbred lines with characterized traits before combining them into hybrids. This pre-preparation of genetic material with known characteristics enables systematic selection of parent combinations that will produce stable, high-yielding hybrids.
2Stability of the object's composition
If inbred lines are developed through repeated selfing, then genetic uniformity and stability are achieved, but breeding time and complexity increase
Solution Approach 1:
The breeding program divides the inbred line development into standardized generations (F2, F3, F4, etc.), with clear criteria for advancement at each stage. This segmentation transforms a complex, continuous process into manageable discrete steps, reducing overall program complexity while achieving genetic uniformity.
Solution Approach 2:
The patent systematically changes the parameter of inbreeding level across generations, with each generation increasing genetic uniformity by approximately 50%. This parameter-based approach provides a clear roadmap for achieving desired stability levels without requiring complex decision-making at each step.
3Productivity
If existing rice cultivars are grown to maximize grain yield, then food production is optimized, but adaptability to different growing conditions and disease resistance are compromised
Solution Approach 1:
The hybrid rice cultivars are designed to perform multiple functions: they maintain high grain yield while simultaneously providing adaptability to different environments and disease resistance. This multi-functionality is achieved by combining inbred lines with complementary traits, allowing a single cultivar to address multiple agricultural challenges.
Solution Approach 2:
The patent creates composite genetic materials by combining multiple inbred lines into hybrid cultivars. Each parent line contributes specific desirable traits (yield, disease resistance, adaptability), and their combination produces a hybrid with superior overall performance, analogous to composite materials in engineering that combine different materials to achieve enhanced properties.
Data Source
AI summary
The inbred rice line designated DG263L is disclosed. Embodiments include the seeds of inbred rice line designated DG263L, the plants of inbred rice line designated DG263L, plant parts of inbred rice line designated DG263L, and methods for producing a rice plant produced by crossing rice DG263L with itself or with another rice variety. Embodiments include methods for producing a rice plant containing in its genetic material one or more genes or transgenes and the transgenic rice plants and plant parts produced by those methods. Embodiments also relate to rice cultivars, breeding cultivars, plant parts, and cells derived from inbred rice line designated DG263L, methods for producing other rice cultivars, lines or plant parts derived from inbred rice line designated DG263L, and the rice plants, varieties, and their parts derived from use of those methods. Embodiments further include hybrid rice seeds, plants, and plant parts produced by crossing DG263L with another rice cultivar.