Corn Variety CV521661 Breeding for Genetic Uniformity
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform corn hybrids with desirable traits such as high yield, disease resistance, and pest tolerance, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV521661, which includes specific morphological and physiological characteristics, such as male sterility and herbicide resistance, achieved through cytoplasmic or nuclear factors and genetic modifications, ensures uniformity and desirable traits in inbred and hybrid plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional corn breeding techniques are used to develop hybrids, then various desirable traits can be combined, but genetic non-uniformity results in unpredictable performance
Solution Approach 1:
The patent applies homogeneity by developing highly homozygous inbred parental lines (95-99% homozygosity) through repeated self-pollination and selection. This ensures that all plants in each parental line are genetically uniform, which in turn produces uniform hybrid offspring when crossed. The consistent performance across the hybrid population results from the genetic uniformity of the parental inbreds used in the cross.
2Stability of the object's composition
If self-pollination is used to develop uniform inbred plants, then genetic uniformity is achieved, but breeding program complexity increases
Solution Approach 1:
The patent segments the breeding program into distinct phases: developing multiple independent inbred lines through self-pollination, evaluating them separately for desired traits, and then crossing selected lines to produce hybrids. This segmentation allows parallel development of multiple parental lines, reducing overall program complexity while maintaining genetic uniformity within each line.
Solution Approach 2:
The patent applies preliminary action by developing and evaluating multiple inbred parental lines before performing the actual hybrid cross. The parental lines are pre-selected for specific desirable traits through generations of self-pollination and selection, so that when crossed, the hybrid inherits predetermined combinations of traits, streamlining the breeding process.
3Adaptability or versatility
If cross-pollination is used to produce hybrid plants, then genetic diversity is increased, but uniformity among hybrid plants decreases
Solution Approach 1:
The patent resolves this contradiction by ensuring that while cross-pollination introduces genetic diversity between hybrids (different F1 combinations), each hybrid population maintains uniformity because it is derived from crossing two highly homozygous inbred lines. All plants within a given hybrid population receive the same parental genomes, ensuring uniformity, while different hybrid populations exhibit diversity through different parental combinations.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV521661. The invention thus relates to the plants, seeds and tissue cultures of the variety CV521661, and to methods for producing a corn plant produced by crossing a corn plant of variety CV521661 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 CV521661 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 CV521661.