Hybrid Corn CH960405 Breeding for Uniform Yield
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid varieties with desirable traits such as high yield, disease resistance, and uniformity, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the hybrid corn variety CH960405, which incorporates a cytoplasmic or nuclear factor for male sterility and introduces genetic loci conferring traits like herbicide resistance, insect resistance, and disease resistance, using backcrossing and genetic transformation techniques to ensure consistent expression of desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop hybrid corn varieties, then genetic diversity is increased, but uniformity of hybrid plants decreases leading to unpredictable performance
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred parent lines through self-pollination and selection, then crossing these standardized parents to produce uniform F1 hybrids. This segmentation allows genetic diversity to be captured in the parent selection phase while ensuring uniformity in the hybrid production phase.
Solution Approach 2:
The invention changes the genetic parameter state by forcing homozygosity in parent lines through repeated self-pollination and selection, then utilizing the cross between these fixed-parameter parents to generate uniform F1 hybrids with consistent heterozygous expression, thereby resolving the contradiction between diversity and uniformity.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniformity of parent lines is improved, but genetic diversity is reduced
Solution Approach 1:
Homozygous inbred parent lines are developed in advance through self-pollination and selection before the hybrid crossing step. This preliminary action creates standardized genetic backgrounds that ensure uniformity in the parent lines while allowing breeders to select diverse parental combinations for the subsequent cross.
Solution Approach 2:
The self-pollination process creates identical copies of parental genotypes across multiple generations, fixing the genetic composition of parent lines. This copying mechanism ensures that once a desirable inbred line is developed, it can be reproduced uniformly across different breeding cycles and locations.
3Productivity
If cross-pollination is used to produce hybrid plants, then genetic diversity and vigor are improved, but uniformity among progeny decreases
Solution Approach 1:
By changing the parental parameter state to complete homozygosity through inbreeding, the cross-pollination process produces F1 hybrids with uniform heterozygous expression at all loci. This parameter transformation ensures that all F1 progeny from a given parental cross are genetically identical and uniformly express hybrid vigor, eliminating the non-uniformity problem.
Solution Approach 2:
The invention applies homogeneity to the parental inbred lines, ensuring they are genetically uniform before crossing. This homogeneity in parents translates to uniformity in F1 hybrid progeny, as all offspring receive the same combination of homozygous parental alleles, thereby maintaining both hybrid vigor and uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH960405. The invention thus relates to the plants, seeds and tissue cultures of the variety CH960405, and to methods for producing a corn plant produced by crossing a corn plant of variety CH960405 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH960405.