Hybrid Maize Breeding Platform for Stable Multi-Trait Yield
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Solution Overview
Problem
Existing hybrid maize development methods struggle to combine desirable traits such as disease resistance, heat and drought tolerance, and improved yield while maintaining uniformity and stability in commercial crops.
Innovation Solution
The development of the maize hybrid variety X11T093, produced by crossing specific inbred varieties and incorporating genetic loci for traits like male sterility, disease resistance, and altered metabolism through backcrossing and transformation, along with cytoplasmically-inherited traits to enhance hybrid performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding methods are used to combine multiple desirable traits, then the complexity of the breeding process increases, but the uniformity and stability of the hybrid maize variety may be compromised
Solution Approach 1:
The patent segments the breeding process into distinct stages: developing inbred lines with specific traits, creating the F1 hybrid cross, and then separately introducing additional traits through locus conversion or backcrossing. This segmentation allows systematic combination of multiple traits while maintaining control over uniformity and stability at each stage.
Solution Approach 2:
The patent performs preliminary action by first developing stable inbred parent lines (PH2DNP and PH47CK) with desired baseline traits before creating the hybrid. This preliminary establishment of uniform parent lines ensures that the resulting F1 hybrid inherits consistent characteristics, and subsequent trait additions do not compromise this foundational uniformity.
2Productivity
If multiple traits are introduced through backcrossing and transformation, then the agronomic quality and yield improve, but the time and resources required for development increase
Solution Approach 1:
The patent merges multiple trait introduction methods into a unified breeding strategy. The F1 hybrid X11T093 serves as a platform that can be further improved through either locus conversion or backcrossing with traited versions of the parent lines. This merged approach allows efficient incorporation of multiple desirable traits (disease resistance, insect resistance, herbicide tolerance, etc.) while managing development time through parallel breeding pathways.
Solution Approach 2:
The patent creates a universal F1 hybrid platform (X11T093) that can serve multiple functions: it can be used as-is for immediate production, or serve as a base for developing multiple specialized variants through locus conversion or backcrossing. This multi-functional platform approach maximizes the return on initial breeding investment and accelerates overall trait incorporation across the breeding program.
3Ease of manufacture
If cytoplasmically-inherited traits such as male sterility are introduced, then hybrid seed production efficiency improves, but the genetic stability of the variety may be affected
Solution Approach 1:
The patent extracts the male sterility trait from the nuclear genome and places it in the cytoplasmic genome through cytoplasmic male sterility (CMS). This extraction allows male sterility to be inherited solely through the maternal line, simplifying hybrid seed production by preventing self-pollination of female parent lines. The cytoplasmic inheritance pattern maintains genetic stability because the CMS trait cannot recombine with nuclear genes and is transmitted predictably through the maternal lineage.
Data Source
AI summary
A novel maize variety designated X11T093 and seed, plants and plant parts thereof are produced by crossing inbred maize varieties. Methods for producing a maize plant by crossing hybrid maize variety X11T093 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X11T093 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X11T093, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X11T093 are provided. Methods for producing maize varieties derived from maize variety X11T093 and methods of using maize variety X11T093 are disclosed.