Corn Variety I123913 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform corn hybrids with desirable traits such as high yield, disease resistance, and uniformity, as they often result in unpredictable performance due to genetic non-uniformity from cross-pollination between heterozygous plants.
Innovation Solution
The development of the corn variety I123913, which is a homozygous inbred line with specific traits like male sterility, herbicide tolerance, and disease resistance, using techniques such as backcrossing and genetic transformation to introduce desired genetic loci, ensuring uniformity and stability in progeny.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to develop corn hybrids, then genetic diversity and trait combination are improved, but genetic uniformity and performance predictability 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 standardized inbreds to introduce controlled genetic diversity. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred lines are developed in advance through multiple generations of self-pollination and selection before the hybridization step. This preliminary action ensures that the parental lines have stable, uniform genetics, which then enables predictable hybrid performance when crossed.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity and homozygosity are improved, but genetic diversity and adaptability deteriorate
Solution Approach 1:
Self-pollination and selection are performed as a preliminary action to develop homozygous inbred lines with uniform genetics. These inbreds serve as standardized building blocks that can then be combined in controlled crosses to achieve the desired genetic diversity in hybrids.
Solution Approach 2:
Homozygous inbred lines act as intermediaries between the self-pollination phase (which creates uniformity) and the cross-pollination phase (which creates diversity). The inbreds are the standardized intermediate product that enables controlled hybridization with predictable outcomes.
3Adaptability or versatility
If heterozygous plants are used for crossing, then trait variation is improved, but uniformity and performance consistency deteriorate
Solution Approach 1:
Instead of crossing heterozygous plants to get variation, the approach is inverted: homozygous inbred lines are first developed to achieve uniformity, then these uniform inbreds are crossed to produce the desired trait variation in hybrids. The inversion of the traditional approach allows both uniformity and variation to be achieved at different stages.
Solution Approach 2:
The genetic parameter of homozygosity is changed to achieve uniform inbred lines, then the parameter is changed again in the hybridization step to produce heterozygous hybrids with desired trait variation. This controlled parameter change allows optimization of both uniformity and variation for different breeding objectives.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated I123913. The invention thus relates to the plants, seeds and tissue cultures of the variety I123913, and to methods for producing a corn plant produced by crossing a corn plant of variety I123913 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 I123913 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 I123913.