Corn Variety CV856723 Breeding for Uniform Hybrid Yield
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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 CV856723, 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 traits in the offspring.
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 non-uniformity and performance predictability worsen
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred lines through repeated self-pollination, then crossing these inbreds to produce uniform F1 hybrids. This segmentation allows each phase to be optimized independently - selfing for homozygosity and uniformity, then crossing for trait combination while maintaining uniformity through controlled parent selection.
Solution Approach 2:
Homozygous inbred plants are developed through preliminary self-pollination and selection before the actual crossing step. This preliminary action ensures that the parents used in crossing are genetically uniform and stable, which then guarantees uniform F1 hybrid progeny. The inbreds are prepared in advance through multiple generations of selfing and phenotypic selection.
2Reliability
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity and breeding stability are improved, but genetic diversity and trait variation worsen
Solution Approach 1:
Multiple generations of self-pollination are performed in advance to achieve homozygosity at critical gene loci. This preliminary selfing process creates genetically uniform and stable inbred lines that can then be crossed to produce uniform F1 hybrids. The repeated selfing and phenotypic selection ensure breeding stability while the subsequent crossing introduces needed diversity.
Solution Approach 2:
The invention merges the benefits of self-pollination (homozygosity and uniformity) with the benefits of cross-pollination (trait combination) by using selfed inbred plants as parents for controlled crosses. The inbreds combine genetic uniformity from selfing with the ability to combine desirable traits from different inbred sources through strategic crossing.
3Reliability
If recurrent selection is used to develop inbred plants from breeding populations, then desirable traits are improved, but breeding time and process complexity worsen
Solution Approach 1:
The method uses preliminary self-pollination and selection to develop homozygous inbreds before the crossing step. This preliminary action concentrates desirable traits and achieves homozygosity more efficiently than traditional recurrent selection, reducing the overall breeding cycle time. The inbreds are prepared in advance through targeted selfing and phenotypic selection.
Solution Approach 2:
The breeding approach changes the temporal parameters by performing multiple generations of self-pollination and selection in advance, then executing the crossing in a single step. This parameter change from gradual recurrent selection to accelerated selfing followed by crossing reduces breeding time while maintaining trait improvement reliability.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV856723. The invention thus relates to the plants, seeds and tissue cultures of the variety CV856723, and to methods for producing a corn plant produced by crossing a corn plant of variety CV856723 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 CV856723 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 CV856723.