Inbred Corn Line G07-NPXA6496 Transgenic Male Sterility
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Solution Overview
Problem
The challenge in corn breeding is to develop inbred lines that combine desirable traits such as high yield, disease resistance, and adaptability to various soil types and environmental conditions, while avoiding the complexity of traditional male sterility systems and ensuring uniformity and stability of hybrid seed production.
Innovation Solution
The development of the inbred corn line G07-NPXA6496, which includes a method for producing hybrid seed and plants with specific traits like male sterility, herbicide resistance, and disease resistance, using tissue culture and marker-assisted breeding to introduce targeted traits, and employing transgenic genes for enhanced agronomic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional male sterility systems (CMS) are used to produce hybrid seed, then detasseling labor is eliminated, but the system introduces poor agronomic performance traits and requires breeding and maintaining three different lines (sterile, maintainer, and restorer)
Solution Approach 1:
The patent extracts and eliminates the complexity of traditional CMS systems by using a transgenic male sterility system where a single transgene (barnase) is introduced into the seed parent line. This replaces the need for three separate lines (CMS sterile, maintainer, and restorer) with a simplified two-line system (sterile and restorer), where the sterility and fertility restoration are controlled by specific transgenes rather than complex cytoplasmic and nuclear gene interactions.
Solution Approach 2:
The patent changes the fundamental parameter of male sterility control from cytoplasmic-gene interaction (CMS) to a transgenic system where sterility is controlled by a specific transgene (barnase) and restored by its suppressor (barstar). This parameter change simplifies the breeding system by making sterility a controllable genetic trait rather than a complex cytoplasmic condition requiring multiple lines to maintain.
2Stability of the object's composition
If inbred lines are developed through traditional selfing for multiple generations to achieve homozygosity, then uniformity is improved, but the process requires extensive time and resources
Solution Approach 1:
The patent applies preliminary action by using tissue culture techniques to rapidly multiply selected inbred lines before they are deployed for hybrid seed production. This allows the breeding program to establish uniform, homozygous inbred lines more quickly by pre-multiplying them in controlled tissue culture conditions, reducing the time required for field-based line development and multiplication.
Data Source
AI summary
Basically, this invention provides for an inbred corn line designated G07-NPXA6496, methods for producing a corn plant by crossing plants of the inbred line G07-NPXA6496 with plants of another corn plants. The invention relates to the various parts of inbred G07-NPXA6496 including culturable cells. This invention also relates to methods for introducing transgenic transgenes into inbred corn line G07-NPXA6496 and plants produced by said methods.