Maize Inbred SG451 Breeding for Yield and Disease Resistance
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Solution Overview
Problem
The challenge in maize breeding is to combine desirable traits such as high yield, disease resistance, and adaptability to various environmental conditions into a single, uniform variety.
Innovation Solution
The development of the maize inbred variety SG451, which is created through careful breeding and selection techniques, including doubled haploid methods, to produce a uniform population of true breeding progeny with desirable traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to combine desirable traits, then genetic diversity is improved, but uniformity of the variety deteriorates
Solution Approach 1:
The breeding process is segmented into distinct phases: creating diverse breeding populations through crossing, selecting individual plants with desirable traits, and then self-pollinating selected plants for multiple generations to fix traits and achieve uniformity. This segmentation allows genetic diversity to be explored in early generations while uniformity is achieved in later generations.
Solution Approach 2:
The patent applies preliminary selection actions during the breeding process to identify and select plants with desirable traits before final variety establishment. By performing selection early in the breeding process and then fixing those traits through self-pollination, the method prepares the genetic material in advance to achieve both diversity in trait selection and uniformity in the final variety.
2Stability of the object's composition
If self-pollination is used to create uniform inbred plants, then uniformity is improved, but genetic diversity deteriorates
Solution Approach 1:
The patent performs preliminary crossing of genetically diverse parents to create F1 hybrids with desired trait combinations before applying self-pollination. This preliminary action ensures that the genetic diversity is captured in the F1 generation, and subsequent self-pollination fixes these traits to achieve uniformity without losing the desirable genetic variations.
Solution Approach 2:
The patent creates multiple copies of the selected F1 hybrid genotype through self-pollination and subsequent generations of inbreeding. By copying the genetically diverse F1 genotype many times through self-pollination, uniform inbred lines are produced that all carry the same diverse genetic combination, thus maintaining genetic diversity while achieving uniformity.
3Stability of the object's composition
If multiple breeding generations are advanced to fix traits, then uniformity is improved, but time to maturity deteriorates
Solution Approach 1:
The patent performs preliminary selection of plants with desirable traits in early generations (F2-F4) rather than waiting for later generations. By selecting and advancing only those plants that already exhibit the desired uniform traits, the breeding process is accelerated and time is reduced while still achieving the necessary uniformity for variety release.
4Stability of the object's composition
If controlled pollination is used to prevent uncontrolled breeding, then genetic purity is improved, but complexity of breeding operations deteriorates
Solution Approach 1:
The patent extracts or removes the tassels (male flowers) from selected female plants to prevent uncontrolled self-pollination or cross-pollination. By taking out the male reproductive organs, the breeder ensures that only controlled cross-pollination occurs, maintaining genetic purity without requiring complex containment structures or isolation procedures.
Data Source
AI summary
The present invention provides the inbred maize variety designated SG451 and relates to all plant parts and tissue cultures of variety SG451. The invention further encompasses methods for producing derivations of variety SG451 such as gene-edited plants, transgenically-modified plants or trait integrated plants, and to all plant parts and tissues derived from such methods. The invention further relates to maize seeds and plants produced by crossing inbred SG451 with itself, or with another maize plant. The invention further relates to the inbred and hybrid genetic and/or genomic complements of variety SG451 plants, seeds, and tissues.