Corn Variety CV977853 for Uniform Hybrid Trait Stacking
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Solution Overview
Problem
Existing corn breeding methods struggle to develop uniform hybrids with desirable traits such as higher yield, disease resistance, and drought tolerance, often resulting in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV977853, which is homozygous and self-incompatible, along with the introduction of specific genetic loci for traits like herbicide tolerance and insect resistance, using techniques like backcrossing and genetic transformation, ensures uniformity and desired characteristics in hybrid plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, 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 uniform inbred parental lines through self-pollination, then using controlled cross-pollination only for hybrid seed production. This segmentation allows genetic diversity to be introduced only when needed, while maintaining uniformity in the parental stock.
Solution Approach 2:
Inbred parental lines are developed and stabilized through multiple generations of self-pollination before the hybridization step. This preliminary action ensures that the parental lines are genetically uniform and true-breeding, so that their cross produces predictable, uniform hybrids with the desired trait combinations.
2Stability of the object's composition
If self-pollination is used to develop uniform inbred lines, then genetic uniformity and true-breeding are improved, but genetic diversity and trait combination deteriorate
Solution Approach 1:
Self-pollination is used as a preliminary action to develop and stabilize uniform inbred parental lines before the hybridization step. This ensures the parental lines are genetically uniform and true-breeding, which is necessary for producing predictable hybrids with combined traits.
Solution Approach 2:
The inbred parental lines serve as intermediaries that carry specific desirable traits. These uniform intermediaries are then crossed to produce the final hybrid variety that combines traits from both parents, resolving the contradiction between uniformity and trait combination.
3Reliability
If physical emasculation is used to prevent self-pollination during hybrid seed production, then cross-pollination control is improved, but labor intensity and production efficiency deteriorate
Solution Approach 1:
The mechanical process of physical emasculation is replaced with a genetic system. Male-sterile lines with defective anthers naturally prevent self-pollination without requiring manual intervention, while still allowing controlled cross-pollination. This substitution dramatically reduces labor intensity while maintaining reliable cross-pollination control.
Solution Approach 2:
The male-sterile parental line serves itself by having naturally defective anthers that prevent self-pollination. This self-service mechanism eliminates the need for external emasculation operations, reducing labor requirements while ensuring reliable production of hybrid seed through controlled cross-pollination.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the corn variety designated CV977853. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CV977853, and to methods for producing a corn plant produced by crossing a corn plant of variety CV977853 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 CV977853 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 CV977853.