Maize Variety IID3133 Breeding Segmentation and Preliminary Action
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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 existing methods struggle to combine desirable traits like disease resistance, drought tolerance, and herbicide resistance while maintaining genetic stability and uniformity.
Innovation Solution
The development of the maize variety IID3133, which includes specific traits such as increased water stress resistance, waxy starch, male sterility, and herbicide resistance, achieved through crossing and backcrossing processes, and potentially using transgenes to introduce desired characteristics, ensuring genetic stability and adaptability across different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple desirable traits (disease resistance, drought tolerance, herbicide resistance) are combined through crossing and backcrossing, then the agronomic performance and resistance traits are improved, but the breeding process complexity and time required increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing parental inbred lines with specific desirable traits (disease resistance, drought tolerance, herbicide resistance) before initiating the crossing program. This preliminary characterization of germplasm allows for more efficient breeding by avoiding later-generation selection for these traits, thereby reducing overall program complexity while achieving reliable trait integration in the final variety IID3133
2Stability of the object's composition
If inbred lines are used as parents to ensure genetic uniformity in hybrids, then hybrid seed reproduction consistency is improved, but the inbred seed production becomes difficult due to decreased vigor
Solution Approach 1:
The patent applies parameter changes by optimizing the timing and environmental conditions of inbred seed production to compensate for reduced vigor. The breeding program carefully controls planting density, nutrient management, and environmental conditions during inbred line production to maximize seed set despite the inherent vigor reduction from homozygosity, thereby maintaining both genetic uniformity and acceptable productivity
3Reliability
If open pollinated segregating maize plants are used, then plant vigor and robustness are improved, but the genetic heterogeneity prevents consistent hybrid seed production and reproduction
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct phases: (1) development of homozygous inbred parent lines through self-pollination to ensure genetic uniformity, (2) controlled crossing of selected inbreds to produce F1 hybrids with desired heterosis, and (3) production of uniform hybrid seed through emasculation and controlled pollination. This segmentation allows the program to capture vigor benefits from heterozygosity in the hybrid generation while maintaining genetic stability in the parent lines
Data Source
AI summary
The present invention provides an inbred corn line designated IID3133, methods for producing a corn plant by crossing plants of the inbred line IID3133 with plants of another corn plant. The invention further encompasses all parts of inbred corn line IID3133, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line IID3133, and plants produced according to these methods.