Hybrid Maize Trait Stacking While Preserving Field 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 plant characteristics, which are crucial for commercial crop production.
Innovation Solution
The development of a novel maize hybrid variety X13T108, produced by crossing specific inbred varieties and incorporating genetic loci for traits like male sterility, disease resistance, and herbicide tolerance through backcrossing and transformation, along with cytoplasmic inheritance of traits like CMS, to enhance genetic diversity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding methods are used to combine multiple desirable traits, then genetic diversity and trait combination are improved, but uniformity and stability of plant characteristics deteriorate
Solution Approach 1:
The patent segments the breeding process into distinct stages: developing pure inbred lines with specific traits, then crossing them to create hybrids. This segmentation allows each parent line to maintain genetic purity and uniformity while the hybrid combines diverse traits from both parents, resolving the contradiction between trait combination and uniformity.
Solution Approach 2:
The patent extracts and isolates specific desirable traits into separate inbred lines before combining them. By taking out individual traits (disease resistance, drought tolerance, yield components) and stabilizing them in pure lines first, then combining these pre-sorted genetic packages in hybrid crosses, the method achieves both trait diversity and uniformity within each hybrid population.
2Productivity
If multiple traits are combined in a single hybrid, then adaptability and productivity are improved, but device complexity and breeding difficulty increase
Solution Approach 1:
The breeding program is segmented into separate modular tasks: developing inbred line A with trait set X, developing inbred line B with trait set Y, then crossing them. This modular segmentation of the breeding process reduces overall complexity by breaking down the difficult task of combining multiple traits into manageable sequential steps.
Solution Approach 2:
The patent performs preliminary actions by developing and stabilizing parent inbred lines with specific traits before the actual hybrid crossing. This preliminary preparation of pure lines with predetermined trait combinations simplifies the subsequent hybridization process and reduces the complexity of managing multiple traits simultaneously.
3Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then hybrid seed production efficiency is improved, but genetic stability and breeding control become more difficult
Solution Approach 1:
The patent introduces cytoplasmic male sterility as an intermediary mechanism to control pollination. The CMS cytoplasm acts as a biological mediator that automatically prevents self-pollination and ensures cross-pollination occurs, thereby improving hybrid seed production efficiency while maintaining genetic stability through controlled mating.
Solution Approach 2:
The CMS system provides self-service by automatically preventing self-pollination without requiring manual intervention. The cytoplasmic genetics self-regulate the breeding process by making the female parent unable to produce functional pollen, thereby ensuring hybridization occurs and improving production efficiency while maintaining genetic control.
Data Source
AI summary
A novel maize variety designated X13T108 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 X13T108 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X13T108 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X13T108, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X13T108 are provided. Methods for producing maize varieties derived from maize variety X13T108 and methods of using maize variety X13T108 are disclosed.