Corn Variety CV874402 Homogeneous Inbred Line Breeding
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Solution Overview
Problem
The challenge in corn breeding is to develop uniform corn hybrids with desirable traits such as high yield, disease resistance, and drought tolerance, while maintaining genetic stability and avoiding unpredictable performance due to genetic non-uniformity.
Innovation Solution
The development of the corn variety CV874402, which is a homozygous inbred line capable of producing uniform progeny, along with the introduction of specific genetic loci that confer traits such as male sterility, herbicide tolerance, and insect resistance, achieved through backcrossing and genetic transformation techniques.
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 variety increase, but genetic uniformity and performance predictability decrease
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 lines to introduce desired traits. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
The patent changes the genetic composition parameter by crossing inbred lines with different genetic backgrounds to introduce desirable traits, while simultaneously managing the uniformity parameter through systematic selection and evaluation of F1 hybrids to ensure predictable performance.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred lines, then genetic uniformity and true breeding capability improve, but genetic diversity and trait combination capability worsen
Solution Approach 1:
Homozygous inbred lines are developed in advance through multiple generations of self-pollination and selection before the crossing stage. This preliminary action ensures that each parent line has stable, uniform genetics and known trait profiles, which then facilitates predictable trait combination in the F1 hybrids.
Solution Approach 2:
The inbred lines serve as intermediaries between the goal of genetic uniformity and the goal of trait combination. By first creating uniform inbred lines and then crossing them, the system uses these intermediaries to achieve both uniformity within lines and diversity across hybrids.
3Productivity
If extensive breeding programs and multiple crosses are conducted to develop superior hybrids, then desirable traits and yield potential improve, but breeding complexity and time requirements worsen
Solution Approach 1:
The patent replaces complex, time-intensive mechanical breeding processes with molecular marker-assisted selection. By using DNA markers to track desirable traits, breeders can identify superior hybrids without conducting extensive phenotypic evaluations across multiple generations, thereby reducing program complexity and time requirements.
Solution Approach 2:
Molecular markers serve as copies or proxies for desirable traits. Instead of directly selecting for complex traits like yield and disease resistance through multiple crosses and field evaluations, breeders use marker copies that indicate the presence of these traits, simplifying the selection process.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV874402. The invention thus relates to the plants, seeds and tissue cultures of the variety CV874402, and to methods for producing a corn plant produced by crossing a corn plant of variety CV874402 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 CV874402 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 CV874402.