CV560333 Homozygous Corn Breeding for Uniform Hybrid Performance
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop uniform hybrid plants with desirable traits such as increased yield, disease resistance, and drought tolerance, often resulting in unpredictable performance due to genetic non-uniformity.
Innovation Solution
The development of the corn variety CV560333, which is homozygous and includes cytoplasmic or nuclear factors for male sterility, along with genetic modifications for traits like herbicide tolerance and insect resistance, achieved through backcrossing and genetic transformation, ensuring uniformity and desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding techniques are used to develop corn hybrids, then various desirable traits can be combined in a single variety, but genetic non-uniformity results in unpredictable performance
Solution Approach 1:
The patent employs homozygous inbred parental lines that are genetically uniform and true-breeding. By crossing two homozygous inbreds, the invention produces F1 hybrid progeny that are genetically uniform and predictable in performance, eliminating the genetic non-uniformity that plagues traditional breeding methods while maintaining the ability to combine desirable traits from both parental lines.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniform true-breeding progeny are produced, but the breeding process requires multiple generations and extensive selection
Solution Approach 1:
The patent utilizes pre-developed homozygous inbred parental lines that have already undergone multiple generations of self-pollination and selection to achieve genetic uniformity. This preliminary development of stable inbreds allows the actual hybrid breeding process to proceed efficiently without repeating the time-consuming multi-generational selfing process, as the parental lines are already genetically stabilized and ready for crossing.
3Adaptability or versatility
If cross-pollination is used to produce hybrid plants, then genetic diversity is increased, but the resulting population is non-uniform and performance is unpredictable
Solution Approach 1:
The patent carefully selects two homozygous inbred parental lines with complementary desirable traits and crosses them to produce F1 hybrid progeny. Because both parents are genetically uniform and true-breeding, all F1 offspring receive identical combinations of alleles, resulting in a genetically uniform population that is both diverse in trait combination and predictable in performance, unlike random cross-pollination events.
4Productivity
If extensive breeding programs are implemented to develop superior inbred parental plants, then hybrids with desirable characteristics can be produced, but the complexity of selection and evaluation increases
Solution Approach 1:
The patent focuses breeding efforts on optimizing specific key parameters in the parental inbred lines, such as yield components, stress tolerance genes, and quality traits. By identifying and selecting for critical genetic factors rather than attempting to improve all possible traits simultaneously, the breeding program achieves high-yielding hybrids with manageable complexity, leveraging the fact that F1 hybrids will uniformly express the superior combination of parental traits.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV560333. The invention thus relates to the plants, seeds and tissue cultures of the variety CV560333, and to methods for producing a corn plant produced by crossing a corn plant of variety CV560333 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 CV560333 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 CV560333.