FA4172 Maize Inbred Line Hybrid Seed Production
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Solution Overview
Problem
Corn breeding faces challenges in producing high-yielding, agronomically sound plants that are uniformly adapted across the U.S. Corn Belt, as regional growing conditions and specific issues like Gray Leaf Spot infection, cool temperatures, and soil pH levels require tailored traits in hybrids, which are often not uniformly adapted.
Innovation Solution
The development of the maize variety FA4172, which includes a process for producing hybrid seeds by crossing FA4172 with other maize plants to introduce traits such as increased water stress resistance, waxy starch, male sterility, and disease resistance, using methods like backcrossing and marker-assisted selection to ensure uniformity and desirable agronomic characteristics across different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inbred lines are used to produce hybrid seeds, then uniformity and reproducibility of hybrid plants are improved, but vigor and seed yield are reduced
Solution Approach 1:
The invention segments the breeding process into distinct stages: developing inbred lines for uniformity, then crossing them to produce F1 hybrids for vigor and yield. This segmentation allows each stage to optimize for its specific goal without compromise.
Solution Approach 2:
The invention changes the genetic parameter from homozygosity (inbreds) to heterozygosity (F1 hybrids) to transform the plant population from uniform but weak to vigorous and high-yielding, while maintaining reproducibility through controlled crossing of standardized inbred parents.
2Productivity
If F1 hybrid seeds are produced from inbred lines, then vigor and seed yield are improved, but uniformity across different regions is reduced
Solution Approach 1:
The invention applies local quality by developing inbred lines with specific traits adapted to particular regions or environmental conditions, then combining them in F1 hybrids that exhibit both the vigor of heterozygosity and the regional adaptability of their inbred parents.
Solution Approach 2:
The F1 hybrid seeds serve multiple functions simultaneously: they provide vigor through heterozygosity, maintain uniformity through standardized inbred parents, and offer regional adaptability through the specific trait combinations selected from inbred lines bred for particular environments.
3Reliability
If backcrossing is used to transfer desirable traits, then specific traits are improved, but complexity of the breeding process is increased
Solution Approach 1:
The invention performs preliminary action by first developing and characterizing inbred lines with desirable traits through multiple generations of self-pollination and selection, then using these pre-characterized lines as parents for F1 hybrid production, which simplifies the overall breeding process compared to direct backcrossing.
Solution Approach 2:
The invention uses copying by producing F1 hybrids that are genetic copies of the inbred parents combined in a controlled cross, allowing the desirable traits from inbred lines to be replicated and expressed in the hybrid generation without complex backcrossing procedures.
Data Source
AI summary
The present invention provides an inbred corn line designated FA4172, methods for producing a corn plant by crossing plants of the inbred line FA4172 with plants of another corn plant. The invention further encompasses all parts of inbred corn line FA4172, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line FA4172, and plants produced according to these methods.