Corn Variety CV461699 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like higher yield, disease resistance, and uniformity, but existing methods face challenges in developing 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 CV461699, which includes a cytoplasmic or nuclear factor for male sterility and additional heritable traits such as herbicide tolerance and disease resistance, along with a process for producing hybrid seeds by controlled cross-pollination to ensure genetic stability and desirable characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine genetic backgrounds from multiple inbred plants, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred lines through self-pollination to ensure genetic uniformity, then using controlled cross-pollination only at the final hybridization stage to combine desired traits while maintaining predictability through parental selection
Solution Approach 2:
Preliminary development of homozygous inbred parental lines is performed before hybridization to establish known, uniform genetic backgrounds. This preliminary action ensures that when cross-pollination occurs, the resulting hybrids have predictable performance based on the characterized parental traits
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, 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 homozygous inbred parental lines with uniform genetics. This creates stable, characterized parents that can then be crossed to produce diverse yet predictable hybrids
Solution Approach 2:
Multiple homozygous inbred lines with different desirable traits are merged through controlled cross-pollination to create hybrid progeny that combine the genetic advantages of each parent while maintaining uniform performance
3Stability of the object's composition
If multiple breeding generations are advanced to develop stable inbreds, then trait stability and uniformity are improved, but breeding time and development duration increase
Solution Approach 1:
Multiple generations of self-pollination are performed as preliminary action to establish homozygosity in parental lines before hybridization. This upfront investment in generational advancement ensures trait stability in the final hybrid without requiring multiple generations of hybrid development
Solution Approach 2:
Once stable inbred lines are developed, they can be copied and used repeatedly as parental sources for hybrid production, eliminating the need to re-develop the same genetic combinations and reducing overall breeding time for subsequent varieties
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV461699. The invention thus relates to the plants, seeds and tissue cultures of the variety CV461699, and to methods for producing a corn plant produced by crossing a corn plant of variety CV461699 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 CV461699 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 CV461699.