Hybrid Corn CH010436 CMS Breeding
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Solution Overview
Problem
The challenge in corn breeding is to develop hybrid varieties that combine desirable traits such as high yield, disease resistance, and uniformity, while maintaining genetic stability and preventing self-pollination.
Innovation Solution
The development of the hybrid corn variety CH010436, which includes a cytoplasmic or nuclear factor for male sterility or self-incompatibility, along with genetic modifications that confer traits like herbicide resistance, insect resistance, and disease resistance, is achieved through backcrossing and genetic transformation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to develop hybrid varieties, then genetic diversity and desirable traits combination are improved, but self-pollination prevention and genetic stability become more difficult to maintain
Solution Approach 1:
The patent applies cytoplasmic male sterility (CMS) systems to extract and eliminate the self-pollination capability from the plant. By introducing a sterile cytoplasm type that prevents pollen formation, the invention removes the harmful self-pollination function while preserving cross-pollination ability for hybrid development.
Solution Approach 2:
The patent uses a maintainer line as an intermediary to preserve the sterile cytoplasm. The maintainer line contains restorer genes that compensate for the sterile cytoplasm's lack of pollen production, allowing the maintainer to self-pollinate and produce fertile seeds that maintain the sterile cytoplasm type in subsequent generations.
2Productivity
If multiple desirable traits are combined through breeding, then crop performance is improved, but breeding complexity and time requirements increase
Solution Approach 1:
The patent performs preliminary actions by developing and establishing inbred lines with specific desirable traits before creating the final hybrid. These inbred lines are produced through multiple generations of self-pollination and selection, so that when the hybrid is created, the desired traits are already present in the parental lines, reducing the complexity of combining multiple traits.
Solution Approach 2:
The patent segments the breeding process into distinct phases: developing inbred lines with individual desirable traits, then combining them through controlled cross-pollination to create hybrids with multiple traits. This segmentation allows for systematic accumulation of desirable characteristics without overwhelming complexity.
3Stability of the object's composition
If inbred lines are developed through self-pollination, then genetic uniformity is improved, but loss of heterosis and vigor decreases
Solution Approach 1:
The patent creates a dynamic breeding system where inbred lines with high genetic uniformity are maintained through self-pollination, but then dynamically converted into hybrids through cross-pollination. The hybrid generation restores heterosis and vigor by combining genetically uniform parents with complementary traits, creating a cycle between uniformity and vigor.
Solution Approach 2:
The patent changes the genetic parameter from homozygous (inbred) to heterozygous (hybrid) through controlled cross-pollination. This parameter change restores heterosis and vigor while maintaining the genetic uniformity achieved during the inbreeding phase, as both parents contribute identical genetic material to the hybrid.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH010436. The invention thus relates to the plants, seeds and tissue cultures of the variety CH010436, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010436 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH010436.