Corn Variety CV977142 for Uniform Hybrid Pollination Control
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop uniform hybrid plants with desirable traits such as higher yield, better stalks, resistance to pests and diseases, and tolerance to environmental stressors, due to genetic non-uniformity in cross-pollinated plants.
Innovation Solution
The development of the corn variety CV977142, which is homozygous and self-incompatible, allowing for uniform hybrid production through controlled cross-pollination and introduction of specific genetic traits like herbicide resistance and insect resistance via genetic modification, including cytoplasmic male sterility and transgenes, ensuring stability and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to develop corn hybrids, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred lines through self-pollination to ensure genetic uniformity, then crossing these standardized inbreds to introduce controlled genetic diversity. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred lines are developed in advance through multiple generations of self-pollination and selection before the hybrid crossing stage. This preliminary action ensures that the parental lines have stable, uniform genetics, which then serves as a reliable foundation for the subsequent cross-pollination that introduces diversity.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity is improved, but adaptability and trait combination deteriorate
Solution Approach 1:
Self-pollination and selection are performed as a preliminary action to develop homozygous inbred lines with uniform genetics. Once these standardized parental lines are established, they serve as the foundation for subsequent cross-pollination events that combine desirable traits from different inbred lines, thus achieving trait combination while maintaining the benefits of prior uniformity development.
Solution Approach 2:
Homozygous inbred lines act as intermediaries between the self-pollination phase (which creates uniformity) and the cross-pollination phase (which creates diversity). These inbred lines are the product of self-pollination but serve as the parental material for crossing, mediating the transition from uniformity to controlled genetic diversity with combined traits.
3Ease of manufacture
If natural pollination is used, then breeding simplicity is improved, but control over pollination and genetic purity deteriorates
Solution Approach 1:
Male sterility acts as an intermediary mechanism that simplifies the breeding process by eliminating the need for manual emasculation, while simultaneously providing precise control over pollination. The sterile parent cannot self-pollinate or pollinate others, ensuring genetic purity and forcing controlled cross-pollination with the desired partner, thus achieving both simplicity and precision.
Solution Approach 2:
The male sterile plant serves itself by naturally preventing self-pollination through its sterility trait. This self-service mechanism eliminates the need for external intervention (manual emasculation) to prevent unwanted selfing, while the resulting controlled pollination requirement ensures genetic purity without complicating the breeding process.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the corn variety designated CV977142. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CV977142, and to methods for producing a corn plant produced by crossing a corn plant of variety CV977142 with itself or with another corn plant, such as a plant of another variety. The disclosure further relates to corn seeds and plants produced by crossing plants of variety CV977142 with plants of another variety, such as another inbred line. The disclosure further relates to the inbred and hybrid genetic complements of plants of variety CV977142.