CCIC5729 Maize Inbred Line Segmentation for Yield and Stress Resistance
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Solution Overview
Problem
Corn breeding faces challenges in developing inbred lines with desirable traits such as high yield, disease resistance, and adaptability across different regions of the Corn Belt, due to complex genetic systems and regional-specific growing conditions.
Innovation Solution
The development of the maize variety CCIC5729, which includes a process for introducing additional traits like disease resistance, herbicide resistance, and modified metabolism through backcrossing and transgene introduction, along with breeding methods like pedigree selection and marker-assisted selection, to produce hybrid seeds with consistent and improved agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inbred lines are developed through self-pollination for several generations to achieve homozygosity, then uniformity and true breeding are improved, but vigor and seed yield decrease
Solution Approach 1:
The breeding program segments the development process into distinct phases: developing multiple inbred lines with specific traits, then combining them in hybrid crosses. This allows each inbred to be optimized for homozygosity while the hybrid combination restores vigor and yield through heterosis.
2Stability of the object's composition
If inbred lines are developed to achieve uniformity and true breeding, then hybrid seed reproducibility is improved, but plant vigor decreases
Solution Approach 1:
The program separates the functions of uniformity (achieved in inbreds through self-pollination) and vigor (achieved in hybrids through cross-pollination). This segmentation allows each component to excel at its specific function while working together in the hybrid system.
Solution Approach 2:
The hybrid combines genetic material from two different inbred lines, creating a composite genetic structure that exhibits heterosis. This composite approach allows the hybrid to display superior vigor and performance compared to either parent inbred line.
3Adaptability or versatility
If breeding programs aim to combine multiple desirable traits from parental germplasm, then trait diversity is improved, but breeding complexity increases
Solution Approach 1:
The breeding program segments trait incorporation into two main approaches: (1) developing inbred lines that each possess specific desirable traits through targeted selection, and (2) combining these pre-developed inbreds in hybrid crosses to achieve cumulative trait expression. This segmentation simplifies the overall breeding complexity by breaking down the multifaceted goal into manageable components.
Data Source
AI summary
The present invention provides an inbred corn line designated CCICS729, methods for producing a com plant by crossing plants of the inbred line CCICS729 with plants of another com plant. The invention further encompasses all parts of inbred con line CCIC5729, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred com line CCICS729, and plants produced according to these methods.