EX6077 Corn Variety Breeding for Genetic Uniformity
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform corn hybrids with desirable traits such as high yield, disease resistance, and uniform germination, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety EX6077, which includes methods for producing inbred corn plants with specific traits like male sterility, herbicide tolerance, and disease resistance, using techniques such as backcrossing and genetic transformation to introduce desired genetic loci, and the use of cytoplasmic-male sterility to control pollination and ensure uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional corn breeding techniques are used to develop hybrids, then various desirable traits can be combined, but genetic non-uniformity among hybrid plants results in unpredictable performance
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred lines through multiple generations of self-pollination, then crossing these standardized lines to produce uniform F1 hybrids. This segmentation ensures genetic uniformity within each phase while allowing trait combination across phases.
Solution Approach 2:
The patent changes the genetic uniformity parameter by enforcing homozygosity in parental inbred lines through repeated self-pollination (typically 5-7 generations). This parameter change ensures that all plants in the F1 hybrid generation are genetically identical, making performance predictable while still combining desirable traits from different parental lines.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniform true-breeding progeny are produced, but time to achieve homozygosity increases
Solution Approach 1:
Homozygous inbred lines are developed in advance through multiple generations of self-pollination and selection before the hybridization phase. This preliminary action creates genetically stable parental lines that can then be crossed to produce uniform F1 hybrids, separating the time-consuming homozygosity achievement from the hybrid production.
Solution Approach 2:
Once homozygous inbred lines are established, they serve as stable genetic copies that can be repeatedly crossed with other inbred lines to produce consistent F1 hybrids. The inbred lines act as standardized genetic templates that can be used across multiple hybrid production cycles.
3Productivity
If cross-pollination is used to produce hybrid plants, then genetic diversity and vigor are improved, but non-uniformity among plants increases
Solution Approach 1:
The patent applies different genetic strategies to different parts of the breeding system: homozygous inbred lines are maintained with complete genetic uniformity, while the F1 hybrid generation benefits from heterozygosity and hybrid vigor. This local differentiation of genetic quality allows both uniformity and vigor to be achieved in appropriate contexts.
Solution Approach 2:
The breeding system dynamically transitions between two states: homozygous inbred lines (stable, uniform) and F1 hybrid plants (diverse, vigorous). The system moves from static genetic composition in parental lines to dynamic genetic expression in hybrid offspring, optimizing both uniformity and productivity at different stages.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated EX6077. The invention thus relates to the plants, seeds and tissue cultures of the variety EX6077, and to methods for producing a corn plant produced by crossing a corn plant of variety EX6077 with itself or with another corn plant, such as a plant of another variety. The invention further relates to corn seeds and plants produced by crossing plants of variety EX6077 with plants of another variety, such as another inbred line. The invention further relates to the inbred and hybrid genetic complements of plants of variety EX6077.