Corn Variety CV375432 Breeding for Uniform Hybrid Yield
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform corn hybrids 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 corn variety CV375432, which includes specific physiological and morphological characteristics, such as cytoplasmic or nuclear factors for male sterility, and the use of genetic loci for traits like herbicide tolerance and disease resistance, along with tissue culture methods to regenerate plants with consistent traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cross-pollination breeding methods are used to develop corn hybrids, then genetic diversity is improved, but uniformity of the hybrid population deteriorates
Solution Approach 1:
The patent applies preliminary action by first developing homozygous inbred parental lines through multiple generations of self-pollination and selection before crossing. This preliminary homogenization of the parental genomes ensures that when cross-pollination occurs, all F1 hybrids receive identical parental alleles, guaranteeing uniformity while still benefiting from the genetic diversity introduced by the cross between two different inbred lines.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniformity of the plant population is improved, but genetic diversity deteriorates
Solution Approach 1:
The patent merges the effects of self-pollination (which creates uniformity) with cross-pollination (which creates diversity) in a sequential breeding strategy. First, self-pollination is used to create uniform homozygous inbred parental lines. Then, cross-pollination between different inbred lines is performed to generate F1 hybrids that combine the genetic diversity of different parental lines while maintaining uniformity across the entire F1 population.
3Reliability
If multiple breeding generations are conducted to develop superior inbreds, then desirable traits are improved, but time to maturity deteriorates
Solution Approach 1:
The patent applies self-service through the use of cytoplasmic male sterility (CMS) in the inbred parental lines. The CMS trait causes automatic self-emasculation, eliminating the need for manual emasculation operations. This self-service mechanism significantly reduces the time and labor required for hybrid seed production while maintaining the reliability of desirable traits that have been bred into the inbred lines.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV375432. The invention thus relates to the plants, seeds and tissue cultures of the variety CV375432, and to methods for producing a corn plant produced by crossing a corn plant of variety CV375432 with itself or with another corn plant, such as a plant of another variety. The invention further relates to corn seeds and plants produced by crossing plants of variety CV375432 with plants of another variety, such as another inbred line. The invention further relates to the inbred and hybrid genetic complements of plants of variety CV375432.