CV399175 Corn Variety Uniformity and Trait Stability
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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 herbicide tolerance, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV399175, which includes a cytoplasmic or nuclear factor for male sterility and specific genetic loci conferring traits like herbicide resistance, insect resistance, and modified metabolic pathways, ensuring uniformity and desirable agronomic characteristics through controlled pollination and genetic modification techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional corn breeding techniques are used to develop hybrids, then various desirable traits can be combined in a single variety, but the resulting hybrid plants exhibit genetic non-uniformity leading to unpredictable performance
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred parental lines through self-pollination and selection, then crossing these standardized inbreds to produce uniform F1 hybrids. This segmentation ensures genetic uniformity within each phase while allowing trait combination across phases.
Solution Approach 2:
The patent changes the genetic uniformity parameter by enforcing homozygosity in parental inbred lines through multiple generations of self-pollination and selection. This parameter change ensures that all plants in the F1 hybrid generation are genetically identical, making performance predictable while still combining multiple desirable traits.
2Stability of the object's composition
If self-pollination is used to develop uniform inbred lines, then genetic uniformity is achieved, but the breeding process requires multiple generations and extensive selection time
Solution Approach 1:
Homozygous inbred parental lines are developed in advance through multiple generations of self-pollination and selection before the hybridization step. This preliminary action ensures genetic uniformity is established beforehand, allowing the final F1 hybrid generation to be produced uniformly without requiring additional selection time.
3Adaptability or versatility
If cross-pollination is used to produce hybrid varieties, then genetic diversity and trait combination are achieved, but the resulting population is genetically non-uniform
Solution Approach 1:
The patent applies different genetic characteristics to different parts of the breeding system: parental inbred lines are made homozygous and genetically uniform, while the F1 hybrid generation is made heterozygous but uniformly so across all individuals. This local differentiation of genetic quality allows both trait combination and uniformity.
Solution Approach 2:
The breeding system uses asymmetric parental lines with specific homozygous genotypes that, when crossed, produce symmetrically uniform F1 hybrids. The asymmetry in parental development (through self-pollination) creates the condition for symmetry and uniformity in the hybrid generation.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV399175. The invention thus relates to the plants, seeds and tissue cultures of the variety CV399175, and to methods for producing a corn plant produced by crossing a corn plant of variety CV399175 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 CV399175 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 CV399175.