Corn Variety CV676562 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 struggle to produce stable inbred plants with predictable performance due to genetic non-uniformity from cross-pollination, leading to unpredictable hybrid outcomes.
Innovation Solution
The development of the corn variety CV676562, which includes a cytoplasmic or nuclear factor for male sterility and genetic modifications such as single locus conversions for traits like herbicide tolerance and disease resistance, along with tissue cultures capable of regenerating plants with consistent morphological and physiological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different corn plants, then genetic diversity and trait combination are improved, but genetic uniformity and predictability of hybrid performance deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred lines through self-pollination to achieve genetic uniformity, then crossing these stabilized lines to introduce desirable traits. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred plants are developed and stabilized before the crossing operation. This preliminary action of self-pollination over multiple generations ensures genetic uniformity is established prior to introducing cross-pollination, thereby predicting hybrid performance while still combining desirable 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 ability to combine desirable traits deteriorate
Solution Approach 1:
The invention merges two previously separate breeding approaches (self-pollination for uniformity and cross-pollination for trait combination) into a unified hybrid breeding system. By first creating homozygous inbreds through selfing and then crossing them, both genetic uniformity within lines and desirable trait combination between lines are achieved simultaneously.
3Stability of the object's composition
If multiple generations of selfing and selection are performed to develop inbred plants, then homozygosity and uniformity are improved, but breeding time and complexity increase
Solution Approach 1:
Molecular markers and DNA-based selection techniques replace traditional phenotypic selection methods. This substitution allows breeders to identify and select for desired traits and homozygosity much faster, reducing the number of generations required to develop stable inbred lines while maintaining the same level of genetic uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV676562. The invention thus relates to the plants, seeds and tissue cultures of the variety CV676562, and to methods for producing a corn plant produced by crossing a corn plant of variety CV676562 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 CV676562 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 CV676562.