Maize Hybrid Breeding with Stable Trait Introgression and Uniformity
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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
A novel maize hybrid variety X13T111 is developed by crossing inbred varieties and introducing genetic loci for traits like male sterility, disease resistance, and altered metabolism through backcrossing and transformation, with cytoplasmically-inherited traits ensuring trait inheritance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding is used to develop new maize hybrids, then desirable traits such as disease resistance, heat and drought tolerance, and improved yield can be combined, but uniformity of plant characteristics and stability across generations becomes difficult to maintain
Solution Approach 1:
The patent segments the breeding process into distinct phases: developing inbred lines with specific traits, crossing them to create F1 hybrids, and maintaining separate populations for different purposes. This segmentation allows each phase to be optimized independently, ensuring trait combination while maintaining uniformity through controlled breeding protocols.
Solution Approach 2:
The patent employs preliminary action by developing and characterizing inbred lines before creating the final hybrid. The inbred lines are pre-selected and stabilized for specific traits, ensuring that when they are crossed, the resulting F1 hybrids exhibit uniformity and stability. This preliminary preparation prevents unwanted variation in the final product.
2Productivity
If mechanical harvesting is implemented, then productivity increases, but uniformity of plant characteristics such as germination, stand establishment, growth rate, and maturity becomes critical and difficult to achieve
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific phenotypic parameters in the inbred lines, such as plant height, ear position, and maturity date. By controlling these parameters during the breeding process, the resulting F1 hybrids exhibit uniform characteristics that are essential for mechanical harvesting, ensuring consistent performance across the crop population.
3Ease of manufacture
If cytoplasmic male sterility is introduced to prevent self-pollination, then hybrid seed production is enabled, but the complexity of the breeding system increases
Solution Approach 1:
The patent employs self-service by utilizing cytoplasmic male sterility (CMS) systems where the female parent line automatically prevents self-pollination through cytoplasmic factors. This eliminates the need for manual emasculation or complex pollination control systems, simplifying hybrid seed production while maintaining the necessary biological mechanism for cross-pollination.
Data Source
AI summary
A novel maize variety designated X13T111 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 X13T111 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X13T111 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X13T111, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X13T111 are provided. Methods for producing maize varieties derived from maize variety X13T111 and methods of using maize variety X13T111 are disclosed.