Inbred Corn Line NPID2568 Marker-Assisted Breeding
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Solution Overview
Problem
Corn breeding faces challenges in producing high-yielding, agronomically sound plants that are uniformly adapted across different regions of the Corn Belt, as existing methods struggle to combine desired traits like yield, disease resistance, and adaptability to varying soil types and environments, often requiring extensive breeding and multiple backcrossing events.
Innovation Solution
The development of the inbred corn line NPID2568, which allows for the production of hybrid seeds and plants with specific traits such as male sterility, herbicide resistance, and disease resistance, using methods like marker-assisted breeding to introduce targeted traits and reduce the number of backcrossing events, and employing genetic male sterility systems to avoid detasseling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional corn breeding methods are used to combine desired traits, then trait diversity can be achieved, but the breeding process requires extensive backcrossing events and multiple generations, increasing time and complexity
Solution Approach 1:
The patent replaces traditional mechanical breeding methods (manual cross-pollination and selection over multiple generations) with molecular marker-based selection. Specific DNA markers are used to identify and select plants carrying desired traits, allowing breeders to achieve the same trait combination in fewer generations without relying on time-consuming phenotypic selection and backcrossing
Solution Approach 2:
The patent introduces molecular markers as intermediaries between genotype and phenotype selection. These markers serve as proxies for desired traits, enabling indirect selection of plants carrying specific genes or trait combinations. This intermediary system accelerates the breeding process by allowing selection at the DNA level rather than waiting for trait expression
2Adaptability or versatility
If traditional corn breeding methods are used to combine desired traits, then trait diversity can be achieved, but the breeding process complexity increases with multiple backcrossing events
Solution Approach 1:
The patent replaces complex mechanical breeding procedures (multiple rounds of crossing, detasseling, and phenotypic selection) with a simplified molecular marker-based selection system. DNA extraction and marker analysis replace numerous manual操作步骤, reducing procedural complexity while maintaining trait diversity
Solution Approach 2:
The patent changes the selection parameter from phenotypic observation to genotypic analysis. By using molecular markers to detect specific DNA sequences associated with desired traits, the breeding process shifts from selecting based on physical characteristics to selecting based on genetic composition, simplifying the overall process
3Reliability
If detasseling is used to produce hybrid seed, then male sterility can be achieved, but labor requirements and production complexity increase
Solution Approach 1:
The patent replaces mechanical detasseling with genetic male sterility systems controlled by specific genes or cytoplasmic factors. Plants with these genetic characteristics naturally fail to produce functional pollen, eliminating the need for manual or mechanical removal of tassels while maintaining reliable male sterility for hybrid seed production
Data Source
AI summary
Basically, this invention provides for an inbred corn line designated NPID2568, methods for producing a corn plant by crossing plants of the inbred line NPID2568 with plants of another corn plant. The invention relates to the various parts of inbred NPID2568 including culturable cells. This invention also relates to methods for introducing transgenic transgenes into inbred corn line NPID2568 and plants produced by said methods.