FA6133 Maize Inbred Line Segmentation Breeding for Uniformity and Yield
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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 FA6133, which includes specific traits such as increased water stress resistance, waxy starch, male sterility, and disease resistance, conferred by transgenes, allowing for the production of hybrid seeds and plants adapted to various Corn Belt regions through advanced breeding techniques like backcrossing and marker-assisted selection.
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: creating uniform inbred lines through self-pollination, then crossing them to produce vigorous F1 hybrids. This segmentation allows each stage to optimize for its specific goal - uniformity in inbreds, vigor in hybrids.
Solution Approach 2:
The patent applies different genetic compositions to different parts of the breeding program. Inbred lines are made homozygous for uniformity, while F1 hybrids maintain heterozygosity for vigor. This local differentiation of genetic quality resolves the contradiction between uniformity and productivity.
2Productivity
If F1 hybrid seeds are produced from inbred lines, then vigor and seed yield are improved, but uniformity and reproducibility are reduced
Solution Approach 1:
The invention performs preliminary self-pollination of F1 hybrids to create uniform F2 inbred lines before producing the next generation of F1 hybrids. This preliminary action establishes genetic uniformity that enables reproducible F1 hybrids in subsequent generations.
Solution Approach 2:
The breeding program continues the cycle of creating inbreds, crossing them to F1 hybrids, and selecting superior lines. This continuous process maintains both vigor in F1s and uniformity in the selected lines, ensuring long-term reproducibility.
3Reliability
If conventional breeding methods are used, then existing germplasm is improved, but adaptability to regional conditions and new traits are limited
Solution Approach 1:
The invention introduces new genetic parameters (traits) into existing germplasm through crossing and selection. By changing the genetic composition parameters of the inbred lines, the program creates hybrids adapted to specific regional conditions while maintaining overall performance consistency.
Solution Approach 2:
The breeding program creates a universal system that can produce hybrids adapted to multiple regional conditions. By maintaining a pool of diverse inbred lines with different traits, the program can generate F1 hybrids suitable for various environments, making the breeding system multi-functional and broadly adaptable.
Data Source
AI summary
The present invention provides an inbred corn line designated FA6133, methods for producing a corn plant by crossing plants of the inbred line FA6133 with plants of another corn plant. The invention further encompasses all parts of inbred corn line FA6133, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line FA6133, and plants produced according to these methods.