Inbred Corn Line G06-NP2608 Male Sterility and Marker Breeding
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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, adaptability to different regions, and resistance to diseases and pests, while avoiding the need for detasseling and minimizing the introduction of poor agronomic traits, which has been difficult due to the complexity of genetic systems and regional specificities.
Innovation Solution
The development of the inbred corn line G06-NP2608, which includes a method for producing hybrid seed and plants with specific traits like male sterility, herbicide resistance, and disease resistance, using transgenic genes and marker-assisted breeding to introduce targeted traits, thereby overcoming the limitations of traditional breeding methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop inbred lines, then genetic diversity is maintained, but the complexity of genetic systems makes it difficult to combine multiple desirable traits
Solution Approach 1:
The patent replaces traditional mechanical breeding methods (manual cross-pollination, selection, and hybridization) with molecular markers and transgenic technologies. Specific molecular markers (SNPs, SSRs, RFLPs) are used to identify and select plants with desired traits, while transgenic genes (Bt for insect resistance, glyphosate resistance genes) are directly introduced to confer specific traits, bypassing the complexity of traditional genetic recombination.
Solution Approach 2:
The patent changes the parameter of trait identification from phenotypic observation to genotypic detection using molecular markers. By detecting specific DNA sequences and marker profiles, breeders can precisely identify plants carrying desired traits regardless of environmental conditions, enabling more accurate selection and combination of multiple traits in inbred lines.
2Reliability
If detasseling is performed to produce hybrid seed, then cross-pollination control is improved, but labor requirements and production costs increase
Solution Approach 1:
The patent extracts the male sterile trait from the seed parent through the use of male sterile lines (such as cytoplasmic male sterile or CMS lines). By removing the male fertility function from the seed parent, cross-pollination is automatically controlled without requiring manual detasseling operations, thereby maintaining reliable hybrid seed production while eliminating labor-intensive procedures.
Solution Approach 2:
The patent employs self-service mechanisms through male sterile lines that automatically prevent self-pollination and ensure cross-pollination. The male sterile trait acts as a self-regulating mechanism where the seed parent cannot self-fertilize and must receive pollen from the pollinator line, eliminating the need for human intervention in detasseling and ensuring consistent hybrid seed production.
3Ease of manufacture
If CMS lines are used to eliminate detasseling, then hybrid seed production efficiency improves, but poor agronomic performance traits are introduced
Solution Approach 1:
The patent extracts only the male sterile function from CMS lines while eliminating or correcting associated poor agronomic traits through backcrossing and selection. By separating the male sterile trait from other linked genes responsible for poor performance, the patent maintains the efficiency benefit of CMS while restoring desirable agronomic characteristics in the inbred lines.
Solution Approach 2:
The patent changes the agronomic performance parameters of CMS-based inbred lines through repeated backcrossing with elite parental lines and selection for superior traits. This process gradually improves yield, stress tolerance, and other agronomic characteristics while maintaining the male sterile trait, thereby resolving the contradiction between production efficiency and agronomic performance.
4Stability of the object's composition
If inbred lines are developed through multiple generations of selfing, then homozygosity and uniformity improve, but genetic vigor and adaptability decrease
Solution Approach 1:
The patent changes the approach to achieving homozygosity by using molecular markers to accelerate the inbreeding process and precisely track allele fixation. By detecting specific marker profiles, breeders can identify highly homozygous lines in fewer generations, maintaining genetic uniformity while minimizing the loss of vigor through more efficient selection and potential introduction of vigor-restoring alleles.
Data Source
AI summary
Basically, this invention provides for an inbred corn line designated G06-NP2608, methods for producing a corn plant by crossing plants of the inbred line G06-NP2608 with plants of another corn plants. The invention relates to the various parts of inbred G06-NP2608 including culturable cells. This invention also relates to methods for introducing transgenic transgenes into inbred corn line G06-NP2608 and plants produced by said methods.