Soybean Cultivar Gene Editing for Trait Stacking
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Solution Overview
Problem
Soybean breeding is complex due to self-pollination, requiring intensive research and development to produce new cultivars with desired traits like yield, disease resistance, and environmental adaptability, and existing methods are inefficient in introducing specific genetic alleles for improved traits.
Innovation Solution
The development of soybean cultivar EC1662475 and/or EC1766217, which includes a method for introducing transgenes for herbicide resistance, disease resistance, insect resistance, and modified fatty acid profiles, using site-specific recombination systems to integrate desired traits into the soybean genome, allowing for the production of progeny with specific physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional breeding methods are used, then genetic diversity is maintained through self-pollination, but the efficiency of introducing specific genetic alleles for desired traits is low
Solution Approach 1:
The patent replaces traditional mechanical breeding methods (manual pollination, selection, and crossing) with molecular biology techniques including CRISPR-Cas9 gene editing, TALEN, and zinc finger nucleases. These molecular tools enable precise, targeted modification of specific genes without requiring generations of crossing and selection, thereby dramatically improving breeding efficiency while maintaining genetic integrity.
Solution Approach 2:
The patent segments the breeding process into two distinct phases: (1) generation of mutant libraries through high-throughput mutagenesis and screening to identify alleles with desired traits, and (2) precise introduction of selected alleles into elite cultivars using gene editing tools. This segmentation allows parallel processing of trait discovery and cultivar improvement, resolving the contradiction between maintaining genetic diversity and efficiently introducing specific traits.
2Reliability
If intensive research and development is conducted to produce new cultivars with desired traits, then yield and disease resistance are improved, but the complexity and time required increases
Solution Approach 1:
The patent implements preliminary action by pre-screening large mutant libraries using high-throughput phenotyping and genotyping to identify alleles conferring disease resistance and yield improvement before introducing them into elite cultivars. This preliminary identification and characterization of beneficial alleles eliminates the need for time-consuming field trials and selection processes, reducing breeding time while maintaining reliable trait improvement.
Solution Approach 2:
The patent replaces traditional multi-generational field testing and selection methods with molecular marker-assisted selection and gene editing verification. By using DNA markers linked to disease resistance genes and CRISPR-based verification systems, the patent achieves reliable trait confirmation in a single generation rather than requiring 5-10 years of conventional breeding and field evaluation.
3Adaptability or versatility
If multiple traits are introduced into soybean cultivars, then adaptability and yield potential are enhanced, but the genetic integrity of the variety may be compromised
Solution Approach 1:
The patent applies local quality by introducing multiple desired traits through site-specific gene editing at predetermined locations in the genome, rather than through random mutagenesis or extensive crossing. Each trait modification occurs at a specific genomic locus with precise control over the genetic change, allowing multiple traits to be stacked while maintaining the overall genetic integrity and uniformity of the elite cultivar background.
Solution Approach 2:
The patent replaces traditional crossing methods that would shuffle the entire genome and require multiple generations of backcrossing to recover the original cultivar background with direct gene editing. This substitution allows introduction of multiple traits (e.g., disease resistance, yield, stress tolerance) through independent, targeted modifications without disturbing the genetic integrity of the elite parental lines, maintaining cultivar identity while enhancing adaptability.
Data Source
AI summary
The present invention directed in party to soybean variety EC1662475 and/or EC1766217 breeding and development. The present invention particularly relates to soybean variety EC1662475 and/or EC1766217 and its seed, cells, germplasm, plant parts, and progeny, and methods of using EC1662475 and/or EC1766217, e.g., in a breeding program.