Corn Variety CV692290 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 due to genetic non-uniformity in cross-pollinated plants, which requires the development of stable inbred parental lines with specific characteristics.
Innovation Solution
The development of the corn variety CV692290, which includes a cytoplasmic or nuclear factor for male sterility and additional heritable traits like herbicide tolerance and disease resistance, along with a process for producing hybrid seeds by crossing inbred plants to ensure genetic uniformity and desirable characteristics in the offspring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used in corn breeding, then genetic diversity and adaptability are improved, but genetic uniformity and predictability of performance deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing uniform inbred parental lines through self-pollination (achieving genetic uniformity), then crossing these inbreds to produce hybrid offspring (introducing genetic diversity). This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Inbred parental lines are developed and stabilized through multiple generations of self-pollination before the cross-pollination step. This preliminary action ensures that the parental lines have the desired genetic uniformity and stability before introducing cross-pollination to generate hybrid vigor and diversity in the offspring.
2Stability of the object's composition
If inbred plants are developed through self-pollination and selection, then genetic uniformity and trait consistency are improved, but breeding time and complexity increase
Solution Approach 1:
The breeding program uses periodic cycles of self-pollination and selection over multiple generations to progressively fix desired traits and achieve genetic uniformity. This periodic repetition of selection and selfing allows efficient accumulation of homozygosity without requiring excessively long time periods.
Solution Approach 2:
Phenotypic selection provides continuous feedback during the inbreeding process, allowing breeders to identify and select plants that express desired traits consistently. This feedback mechanism accelerates the development of uniform inbred lines by directing selection toward specific target characteristics.
3Productivity
If multiple desirable traits are combined in a single variety, then overall performance and agronomic quality are improved, but breeding complexity and difficulty of selection increase
Solution Approach 1:
The complex task of combining multiple traits is segmented by first developing inbred lines that each excel in specific traits, then crossing these specialized lines to combine traits in the hybrid. This segmentation makes the breeding process more manageable than attempting to select for all traits simultaneously in a single population.
Solution Approach 2:
Desirable traits from different inbred parental lines are merged through cross-pollination to create hybrid offspring that inherit the combined advantages of both parents. This merging allows accumulation of multiple beneficial traits that would be difficult to assemble through selection alone.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV692290. The invention thus relates to the plants, seeds and tissue cultures of the variety CV692290, and to methods for producing a corn plant produced by crossing a corn plant of variety CV692290 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 CV692290 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 CV692290.