Corn Variety CV741729 Breeding for Genetic Uniformity
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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 CV741729, which is a stable inbred line with specific traits like male sterility, herbicide tolerance, and disease resistance, achieved through backcrossing and genetic transformation techniques, ensuring uniformity and desirable characteristics in progeny plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional corn breeding techniques are used to develop hybrids, then various desirable traits can be combined in a single variety, but the resulting hybrid plants show genetic non-uniformity leading to unpredictable performance
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred parental lines through self-pollination, then crossing these standardized inbreds to produce uniform F1 hybrids. This segmentation ensures genetic uniformity within each phase while allowing trait combination across phases.
Solution Approach 2:
The patent changes the genetic homogeneity parameter by first creating homozygous inbred lines (high homogeneity) through multi-generation selfing, then producing heterozygous F1 hybrids (controlled heterogeneity) through controlled crosses. This parameter control ensures uniform performance while combining desirable traits.
2Manufacturing precision
If self-pollination is used to create uniform inbred lines, then genetic uniformity is achieved, but the breeding process requires multiple generations and extensive selection time
Solution Approach 1:
Homozygous inbred parental lines are developed in advance through multi-generation self-pollination and selection before the hybridization step. This preliminary action ensures genetic uniformity is established beforehand, allowing the final hybrid production to be time-efficient.
Solution Approach 2:
The breeding program cushions against time loss by maintaining established inbred lines as reusable parental stock. Once homozygous inbreds are developed, they can be repeatedly crossed to produce uniform hybrids without repeating the lengthy homozygization process, thus cushioning against future time losses.
3Adaptability or versatility
If cross-pollination is used to create hybrid variety, then genetic diversity and trait combination are improved, but the resulting population lacks uniformity and shows unpredictable performance
Solution Approach 1:
The patent applies local quality by ensuring uniformity at the parental line level (homozygous inbreds with fixed genotypes) while allowing diversity in the hybrid offspring. The controlled cross between standardized inbreds produces F1 hybrids that are uniform among themselves but genetically diverse from previous generations, achieving local uniformity where needed.
Solution Approach 2:
Homozygous inbred lines serve as intermediaries between the goal of trait combination and the need for uniformity. These standardized inbreds act as consistent parental sources that, when crossed, produce uniform F1 hybrids with combined traits, mediating between genetic diversity and population uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV741729. The invention thus relates to the plants, seeds and tissue cultures of the variety CV741729, and to methods for producing a corn plant produced by crossing a corn plant of variety CV741729 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 CV741729 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 CV741729.