Corn Variety CV487690 Breeding Segmentation
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like high yield, disease resistance, and uniformity, but existing methods struggle to produce stable inbred plants with predictable performance due to genetic non-uniformity in hybrid populations.
Innovation Solution
The development of the corn variety CV487690, which includes a cytoplasmic or nuclear factor for male sterility and specific genetic loci conferring traits such as herbicide tolerance, insect resistance, and modified metabolic pathways, ensuring uniformity and desirable characteristics through controlled pollination and genetic modification techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If corn breeding uses cross-pollination to combine desirable traits from different plants, then genetic diversity and trait combination are improved, but genetic uniformity and predictability of the population 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 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 genetic uniformity is established in the parental generation, which then enables predictable hybrid performance when cross-pollination occurs.
2Stability of the object's composition
If self-pollination is used to develop uniform inbred plants, then genetic uniformity and true breeding are improved, but genetic diversity and trait combination are reduced
Solution Approach 1:
Self-pollination is used as a preliminary action to develop and stabilize inbred parental lines with desired traits before the actual hybridization step. This preliminary uniformity creation enables the subsequent cross-pollination to produce predictable hybrids with combined traits.
Solution Approach 2:
Uniform inbred lines serve as intermediaries that carry specific desirable traits. These standardized intermediaries are then crossed to combine traits in a controlled manner, achieving both uniformity and trait combination.
3Adaptability or versatility
If hybrid seed is produced from crossing heterozygous plants, then genetic diversity and adaptability are improved, but uniformity of the resulting population and performance predictability deteriorate
Solution Approach 1:
The breeding system segments the population into uniform inbred parental lines and uniform hybrid offspring. By maintaining uniformity at each generational level through controlled pollination, the system achieves both adaptability in the hybrid and uniformity within each population.
Solution Approach 2:
The system changes the genetic parameter state from heterozygous (diverse) in the hybrid generation to homozygous (uniform) in the inbred parental generation, and back to controlled heterozygosity in the hybrid offspring. This parameter cycling maintains uniformity while enabling trait combination.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV487690. The invention thus relates to the plants, seeds and tissue cultures of the variety CV487690, and to methods for producing a corn plant produced by crossing a corn plant of variety CV487690 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 CV487690 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 CV487690.