Corn Variety I291336 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods struggle to produce stable, uniform corn hybrids due to genetic non-uniformity in cross-pollinated plants, leading to unpredictable performance.
Innovation Solution
The development of the corn variety I291336, which includes a cytoplasmic or nuclear factor for male sterility to prevent self-pollination, along with specific genetic loci for traits like herbicide tolerance and disease resistance, and the use of tissue cultures to regenerate plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, then genetic diversity and trait combination are improved, but genetic non-uniformity and performance predictability deteriorate
Solution Approach 1:
The breeding program segments the corn population into distinct inbred lines through repeated self-pollination, creating homogeneous genetic units that can be reliably crossed. This segmentation allows each inbred line to be genetically uniform while still enabling trait combination through controlled crosses between different inbreds.
Solution Approach 2:
The patent applies preliminary action by developing inbred lines through multiple generations of self-pollination and selection before creating hybrids. This preliminary inbreeding process establishes genetically uniform parent lines that will produce predictable and uniform F1 hybrids, thereby ensuring performance reliability while maintaining trait combination capabilities.
2Stability of the object's composition
If self-pollination is used to create uniform inbred plants, then genetic uniformity is improved, but the ability to combine diverse traits deteriorates
Solution Approach 1:
The breeding program segments the corn germplasm into multiple distinct inbred lines, each maintaining genetic uniformity through self-pollination. These segmented inbred lines serve as stable genetic foundations that can be systematically combined through cross-pollination to create hybrids with diverse and desirable traits.
Solution Approach 2:
The patent merges the benefits of self-pollination (genetic uniformity) and cross-pollination (trait combination) by first creating uniform inbred lines through self-pollination, then combining these lines through controlled cross-pollination. This merging allows the program to achieve both genetic stability in parent lines and diversity in hybrid progeny.
3Stability of the object's composition
If multiple generations of inbreeding are performed to achieve homozygosity, then genetic uniformity is improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by establishing inbred lines through multiple generations of self-pollination before creating hybrids. This preliminary inbreeding phase, while time-consuming, establishes genetically uniform parent lines that can then be crossed to produce uniform F1 hybrids, thereby reducing the need for extended breeding cycles.
Solution Approach 2:
The breeding program utilizes parameter changes by selecting for specific desirable traits during the inbreeding process, thereby accelerating the achievement of homozygosity for those traits. This targeted selection approach reduces the number of generations required compared to random inbreeding, while still achieving the desired genetic uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated I291336. The invention thus relates to the plants, seeds and tissue cultures of the variety I291336, and to methods for producing a corn plant produced by crossing a corn plant of variety I291336 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 I291336 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 I291336.