Corn Variety CV935311 Breeding for Predictable Hybrid Performance
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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 CV935311, 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 physiological and morphological characteristics.
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 unpredictable performance occur
Solution Approach 1:
The breeding process is segmented into distinct phases: creating inbred lines through repeated self-pollination to achieve homozygosity, then crossing these inbreds to produce uniform F1 hybrids. This segmentation allows control over genetic uniformity at different stages, resolving the contradiction between trait combination and performance predictability.
Solution Approach 2:
Inbred lines are developed through preliminary self-pollination and selection before the actual hybrid crossing. This preliminary action ensures that the parent lines are genetically uniform and stable, so that when they are crossed, the F1 hybrids exhibit uniform and predictable performance, eliminating the non-uniformity problem.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity is improved, but loss of heterosis and reduced vigor occur
Solution Approach 1:
The breeding system dynamically switches between self-pollination (to create uniform inbreds) and cross-pollination (to produce vigorous F1 hybrids). The inbred lines maintain homozygosity through self-pollination, but the F1 generation benefits from heterosis through controlled crosses, allowing the system to optimize both uniformity and vigor at different stages.
Solution Approach 2:
The system changes the pollination parameter from self-pollination (for inbred line development) to cross-pollination (for F1 hybrid production). This parameter change allows the system to achieve homozygosity in the parent lines while maintaining heterosis and vigor in the F1 generation, resolving the contradiction between uniformity and strength.
3Stability of the object's composition
If repeated self-pollination is used to achieve homozygosity, then genetic stability is improved, but breeding time and generations required increase
Solution Approach 1:
Inbred lines are developed through preliminary repeated self-pollination and selection before the hybrid crossing phase. This preliminary action, while time-consuming, establishes genetically stable and uniform parent lines that can then be crossed to produce uniform F1 hybrids, achieving homozygosity efficiently through advance preparation.
Solution Approach 2:
The breeding process creates copies of desirable traits through repeated self-pollination and selection, fixing them in homozygous inbred lines. These inbreds serve as genetic copies that can be reliably crossed to produce uniform F1 hybrids, achieving genetic stability through trait copying and fixation in parent lines.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV935311. The invention thus relates to the plants, seeds and tissue cultures of the variety CV935311, and to methods for producing a corn plant produced by crossing a corn plant of variety CV935311 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 CV935311 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 CV935311.