Corn Variety CV773381 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 uniformity, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV773381, which includes a cytoplasmic or nuclear factor for male sterility and genetic modifications conferring traits like herbicide tolerance, disease resistance, and modified metabolism, along with a process for producing inbred and hybrid corn plants using specific crossing and tissue culture methods to ensure genetic stability and desirable characteristics.
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 consistency within each phase while achieving trait combination across phases.
Solution Approach 2:
The invention emphasizes creating homogeneous populations through homozygous inbred lines that are uniform genetically. By ensuring both parental inbreds are genetically homogeneous and homozygous, the resulting F1 hybrid population achieves uniformity and predictable performance while combining desirable traits from both parents.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniform true-breeding progeny are produced, but the breeding process requires multiple generations and extensive selection time
Solution Approach 1:
The invention applies preliminary action by extensively developing and selecting homozygous inbred parental lines before the actual hybrid crossing. This preliminary multi-generation selfing and selection process establishes genetically stable, uniform parents that will produce predictable F1 hybrids, reducing the need for subsequent selection time.
Solution Approach 2:
Self-pollination is utilized as a self-service mechanism where the plant fertilizes itself, automatically producing homozygous progeny that are genetically uniform. This self-service approach to breeding eliminates the need for manual cross-pollination control during the inbred development phase and ensures genetic consistency.
3Adaptability or versatility
If cross-pollination is used to produce hybrid plants, then genetic diversity and trait combination are achieved, but the resulting population lacks uniformity and shows unpredictable performance
Solution Approach 1:
The invention achieves population homogeneity by using homozygous inbred parental lines as parents. Since both parents are genetically uniform and homozygous, all F1 hybrid offspring receive identical genetic combinations, resulting in a uniform population that exhibits consistent performance while still combining desirable traits from both parents.
Solution Approach 2:
The breeding system is segmented into homozygous parental lines that are developed separately through self-pollination, then crossed to produce uniform F1 hybrids. This segmentation ensures that the cross-pollination phase produces uniform progeny by using genetically standardized parents, rather than creating genetic diversity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV773381. The invention thus relates to the plants, seeds and tissue cultures of the variety CV773381, and to methods for producing a corn plant produced by crossing a corn plant of variety CV773381 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 CV773381 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 CV773381.