Maize Inbred ID3659 Regional Adaptation and Male Sterility
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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 region-specific traits, and existing hybrids are not uniformly adapted for broad regional use.
Innovation Solution
The development of the maize variety ID3659, which includes a process for producing hybrid seeds by crossing ID3659 with other maize plants to introduce traits such as increased water stress resistance, waxy starch, male sterility, and disease resistance, using backcrossing and marker-assisted selection to ensure uniformity and adaptability across different Corn Belt regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing hybrid corn varieties are developed using traditional breeding methods, then they show robust and vigorous plants with increased seed yield, but they are not uniformly adapted across different Corn Belt regions due to regional variations in growing conditions
Solution Approach 1:
The patent segments the breeding process by developing region-specific inbred lines tailored to different Corn Belt environments (e.g., Northern, Western, Eastern regions). Each inbred line is specifically adapted to regional conditions such as soil pH, temperature, and disease pressure, allowing hybrids to maintain high yield while achieving uniform adaptability across diverse regions through targeted regional development programs
Solution Approach 2:
The patent applies local quality by creating inbred lines with specific trait combinations optimized for particular regions. For example, Northern region inbreds are selected for cool-weather emergence and Northern Corn Leaf Blight resistance, while Western region inbreds emphasize drought tolerance and alkaline soil adaptation. This regional customization enables each hybrid to exhibit locally optimized performance while maintaining overall program-wide adaptability
2Stability of the object's composition
If inbred lines are developed through self-pollination for multiple generations to achieve homozygosity, then uniform populations of true breeding progeny are produced, but the inbred plants show decreased vigor and are difficult to produce
Solution Approach 1:
The patent introduces male sterility as an intermediary mechanism to eliminate the need for manual detasseling during hybrid seed production. By incorporating cytoplasmic male sterility (CMS) or genetic male sterility (GMS) into the female parent inbred line, pollen production is naturally prevented, allowing efficient hybrid seed production without compromising the homozygosity achieved through generations of self-pollination
Solution Approach 2:
The patent employs dynamic trait conversion strategies where inbred lines are continuously improved through recurrent selection and genomic selection. This dynamic approach allows the maintenance of homozygosity while periodically introducing new genetic variation through controlled crosses and selection, preventing vigor degradation and maintaining high inbred seed production capability across breeding cycles
3Productivity
If hybrid seed is produced by crossing two homozygous inbreds, then heterozygous hybrid plants with robust vigor are obtained, but the process requires emasculation through detasseling or chemical treatment which increases complexity
Solution Approach 1:
The patent uses male sterility genes as an intermediary to automatically prevent pollen production in the female parent. This genetic mechanism replaces the need for mechanical detasseling or chemical emasculation, simplifying the hybrid seed production process while maintaining high hybrid seed yield. The male sterile trait acts as a built-in emasculation system that requires no additional operational steps
Solution Approach 2:
The patent implements self-service by designing inbred lines that automatically perform the emasculation function through their own genetics. The female parent's male sterility trait causes it to self-disable pollen production, eliminating the need for external intervention (detasseling workers or chemical applications). This self-service approach reduces labor and chemical inputs while maintaining hybrid seed production efficiency
Data Source
AI summary
The present invention provides an inbred corn line designated ID3659, methods for producing a corn plant by crossing plants of the inbred line ID3659 with plants of another corn plant. The invention further encompasses all parts of inbred corn line ID3659, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line ID3659, and plants produced according to these methods.