Maize Inbred Line FA4346 Hybrid Seed Uniformity and Yield
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Solution Overview
Problem
Current corn breeding methods face 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 FA4346, which includes a process for producing hybrid seeds by crossing FA4346 with other maize plants to introduce traits such as increased water stress resistance, waxy starch, male sterility, and disease resistance, using techniques like backcrossing and marker-assisted selection to maintain desired characteristics across generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inbred maize lines are used for hybrid seed production, then uniformity and reproducibility of hybrid seed are improved, but seed yield and vigor are reduced
Solution Approach 1:
The patent segments the maize breeding program into distinct phases: producing F1 hybrid seed from inbred parents for uniformity, then using those F1 hybrids as parents for F2 grain production where heterozygosity provides vigor and yield. This segmentation allows each generation to serve its optimal function.
Solution Approach 2:
The patent employs dynamic breeding strategies where the role of inbreds and hybrids changes across generations. F1 hybrids serve as the vigorous parent for grain production, while F2 grain provides the segregating population for selecting new inbred lines, creating a dynamic cycle that balances uniformity and vigor requirements.
2Adaptability or versatility
If regional adaptation is prioritized for specific Corn Belt conditions, then performance in specific regions is improved, but uniform performance across the entire Corn Belt is reduced
Solution Approach 1:
The patent applies local quality by developing maize inbred lines and hybrids with specific traits tailored to regional conditions within the Corn Belt. Different inbred lines are selected and combined based on their adaptation to specific regional characteristics such as soil type, climate, and disease pressure, allowing optimal performance in each region.
Solution Approach 2:
The patent utilizes parameter changes by modifying genetic composition through selective breeding to achieve both regional specialization and broad adaptability. By changing the genetic parameters of inbred lines through repeated crossing and selection, the program creates hybrids that can adapt to various regional conditions while maintaining core performance standards.
3Adaptability or versatility
If multiple desirable traits are combined in a single variety, then overall agronomic performance is improved, but breeding complexity and time required are increased
Solution Approach 1:
The patent applies preliminary action by pre-selecting and developing inbred lines that possess specific desirable traits before combining them into hybrids. Traits such as disease resistance, stress tolerance, and yield potential are incorporated into parental inbred lines through prior breeding efforts, so that the final hybrid combines multiple pre-validated traits rather than attempting to accumulate them simultaneously.
Solution Approach 2:
The patent employs feedback mechanisms through systematic evaluation and selection processes where the performance of hybrids with combined traits is assessed, and information from these evaluations feeds back into the selection of parental inbred lines for subsequent breeding cycles. This feedback loop allows optimization of trait combinations while managing breeding program complexity.
Data Source
AI summary
The present invention provides an inbred corn line designated FA4346, methods for producing a corn plant by crossing plants of the inbred line FA4346 with plants of another corn plant. The invention further encompasses all parts of inbred corn line FA4346, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line FA4346, and plants produced according to these methods.