Hybrid Maize Breeding With Marker-Guided Trait Stacking
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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 the maize hybrid variety X00V022, produced by crossing 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 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 is improved, but uniformity and stability of plant characteristics deteriorate
Solution Approach 1:
The patent segments the breeding process into distinct phases: first developing inbred lines with specific traits through traditional breeding, then using molecular markers to identify and select individuals with desired trait combinations. This segmentation allows genetic diversity to be introduced in controlled steps while maintaining uniformity through marker-assisted selection at each stage.
Solution Approach 2:
The patent performs preliminary action by developing and characterizing inbred lines with specific desirable traits before combining them in hybrid crosses. Molecular markers are pre-established to track target traits, allowing breeders to predict and select for uniform trait expression in the final hybrid population before field testing.
2Productivity
If multiple desirable traits are combined in a single hybrid, then agronomic quality and yield are improved, but the complexity of the breeding process increases
Solution Approach 1:
The patent applies universality by developing inbred lines that serve multiple functions: they provide disease resistance, yield improvement, and uniformity simultaneously. The molecular marker system also serves multiple purposes by identifying individuals with desired traits, tracking inheritance patterns, and predicting hybrid performance across different environments.
Solution Approach 2:
The patent introduces molecular markers as intermediaries between traditional breeding and final hybrid selection. These markers act as mediators that simplify the breeding process by providing direct genetic evidence of trait presence, reducing the need for complex multi-generational field testing and phenotypic evaluation.
3Stability of the object's composition
If inbred lines are used as parents to ensure uniformity, then plant characteristic uniformity is improved, but genetic diversity and adaptability deteriorate
Solution Approach 1:
The patent creates composite genetic structures by combining multiple inbred lines, each contributing specific desirable traits. The resulting hybrid inherits uniformity from the inbred parents while gaining genetic diversity through the combination of different inbred line genomes, achieving both uniformity and adaptability simultaneously.
Solution Approach 2:
The patent applies local quality by ensuring each inbred line parent contributes specific localized traits (e.g., disease resistance in one parent, yield components in the other) while maintaining overall uniformity. The hybrid expresses these locally optimized traits in a uniform manner across the population.
Data Source
AI summary
A maize variety designated X00V022 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 X00V022 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X00V022 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X00V022, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X00V022 are provided. Methods for producing maize varieties derived from maize variety X00V022 and methods of using maize variety X00V022 are disclosed.