Corn Variety CV309345 Breeding via Segmentation and Preliminary Action
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods struggle to produce stable inbred plants with predictable performance due to genetic non-uniformity from cross-pollination, leading to unpredictable hybrid traits.
Innovation Solution
The development of the corn variety CV309345, which includes a cytoplasmic or nuclear factor for male sterility to prevent self-pollination, along with specific genetic loci for traits like herbicide tolerance and disease resistance, and the use of tissue cultures to regenerate plants with consistent morphological and physiological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used in corn breeding, then genetic diversity and trait combination are improved, but genetic uniformity and predictability of hybrid traits deteriorate
Solution Approach 1:
The breeding program segments the breeding population into distinct inbred lines through repeated self-pollination, creating genetically uniform groups that can be systematically crossed. This segmentation allows controlled cross-pollination between specific lines while maintaining overall genetic uniformity within each line.
Solution Approach 2:
Inbred lines are developed through preliminary self-pollination and selection before hybrid creation. This preliminary action establishes genetically uniform parental lines with predictable traits, ensuring that subsequent hybrid crosses produce uniform and predictable offspring.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity and stability are improved, but genetic diversity and adaptability deteriorate
Solution Approach 1:
Self-pollination is used as a preliminary action to develop genetically uniform inbred lines that serve as stable parental stocks. These uniform lines are then crossed with other uniform lines to generate genetic diversity in the hybrid generation, combining stability with adaptability.
Solution Approach 2:
The breeding program operates in different generational dimensions: self-pollination creates uniformity within lines (one dimension), while cross-pollination between lines creates diversity across the breeding program (another dimension), resolving the contradiction through dimensional separation.
3Adaptability or versatility
If multiple breeding methods are used to combine desirable traits, then trait diversity and adaptability are improved, but breeding program complexity and time required deteriorate
Solution Approach 1:
The breeding program segments trait selection into distinct phases: developing inbred lines with specific traits through self-pollination, then combining these pre-selected lines through cross-pollination. This segmentation reduces complexity by handling one trait at a time in separate lines rather than managing all traits simultaneously.
Solution Approach 2:
Desirable traits are preliminarily selected and fixed in individual inbred lines through self-pollination and selection before combining lines. This preliminary action simplifies the overall program by pre-sorting traits into uniform lines, making the subsequent crossing and combination process more efficient and less complex.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV309345. The invention thus relates to the plants, seeds and tissue cultures of the variety CV309345, and to methods for producing a corn plant produced by crossing a corn plant of variety CV309345 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 CV309345 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 CV309345.