Hybrid Maize Trait Introgression With Uniformity and Stability
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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, which are crucial for commercial crop production.
Innovation Solution
The development of a novel maize hybrid variety X13T106, 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 cytoplasmic inheritance of traits like CMS, to enhance hybrid performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine multiple desirable traits, then disease resistance and yield improvement can be achieved, but uniformity and stability of plant characteristics are compromised
Solution Approach 1:
The patent segments the breeding process into distinct phases: developing inbred lines with specific traits, creating hybrid combinations, and selecting for uniformity. This segmentation allows each phase to optimize for its specific goal while contributing to the overall objective of combining multiple traits with maintained uniformity.
Solution Approach 2:
The patent applies local quality by developing inbred lines that are homozygous at specific loci conferring desirable traits (disease resistance, drought tolerance) while maintaining heterozygosity at other loci important for uniformity and vigor. This localized genetic differentiation allows trait combination without compromising overall uniformity.
2Adaptability or versatility
If multiple inbred lines are crossed to combine desirable traits, then trait diversity increases, but maintaining uniformity of plant characteristics becomes difficult
Solution Approach 1:
The patent performs preliminary action by developing and stabilizing inbred lines before crossing them. These inbred lines are pre-selected for homozygosity at trait loci and uniformity in agronomic characteristics, ensuring that the subsequent hybrid generation inherits both trait diversity and uniformity from the prepared parental lines.
Solution Approach 2:
The patent utilizes parameter changes in ploidy and homozygosity levels strategically: inbred parental lines are maintained at high homozygosity for trait stability, while the F1 hybrid generation exhibits heterozygosity for vigor and uniformity. This parameter manipulation allows simultaneous achievement of trait diversity and uniformity.
3Manufacturing precision
If inbred lines are developed through repeated selfing to achieve uniformity, then genetic uniformity improves, but the time required for variety development increases
Solution Approach 1:
The patent applies partial action by performing a limited number of selfing generations (typically 5-7) to achieve sufficient homozygosity for practical purposes, rather than continuing indefinitely. This partial selfing achieves the necessary genetic uniformity for inbred line stability while minimizing the time investment, balancing purity achievement with development efficiency.
Data Source
AI summary
A novel maize variety designated X13T106 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 X13T106 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X13T106 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X13T106, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X13T106 are provided. Methods for producing maize varieties derived from maize variety X13T106 and methods of using maize variety X13T106 are disclosed.