Corn Variety CV024672 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods struggle to develop stable inbred plants with predictable performance due to genetic non-uniformity from cross-pollination, leading to unpredictable hybrid traits.
Innovation Solution
The development of the corn variety CV024672, which includes a cytoplasmic or nuclear factor for male sterility to prevent self-pollination, along with specific genetic loci for traits like herbicide tolerance and disease resistance, and the use of tissue cultures to regenerate plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, then genetic diversity and trait combination are improved, but genetic non-uniformity and unpredictable performance occur
Solution Approach 1:
The breeding process is segmented into distinct phases: creating diverse F1 hybrids through cross-pollination, then self-pollinating to create uniform F2 inbred lines. This segmentation allows the benefits of cross-pollination (trait combination) to be achieved in the F1 generation, while the F2 generation provides genetic uniformity through self-pollination, resolving the contradiction between diversity and predictability.
Solution Approach 2:
The patent applies preliminary action by first creating F1 hybrids with desirable traits through cross-pollination, then immediately self-pollinating these F1 plants to produce uniform F2 inbred lines. This preliminary self-pollination step ensures that the genetic diversity introduced in the F1 generation is stabilized and made predictable in the F2 generation, eliminating the non-uniformity problem.
2Reliability
If self-pollination is used to create uniform inbred plants, then genetic uniformity is improved, but loss of genetic diversity and limited trait combination occur
Solution Approach 1:
The patent applies preliminary action by first creating F1 hybrids through cross-pollination that combine diverse traits from different parent plants. Only after this preliminary diversity introduction does the self-pollination process begin, allowing the F2 generation to achieve uniformity while retaining the trait diversity introduced in the F1 generation. This sequence resolves the contradiction by timing the diversity introduction before uniformity is achieved.
Solution Approach 2:
The breeding process is segmented into F1 cross-pollination phase (diversity generation) and F2 self-pollination phase (uniformity generation). This segmentation allows the system to first accumulate genetic diversity in the F1 generation, then systematically reduce variation through self-pollination in the F2 generation, achieving both diversity and uniformity at different stages.
3Reliability
If multiple breeding generations are used to develop stable inbreds, then genetic stability is improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by performing self-pollination and selection in the F2 generation to establish stable inbred lines before moving to F3 and subsequent generations. This preliminary stabilization in the F2 generation reduces the number of additional generations needed, thereby achieving inbred stability while minimizing the overall breeding time and complexity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV024672. The invention thus relates to the plants, seeds and tissue cultures of the variety CV024672, and to methods for producing a corn plant produced by crossing a corn plant of variety CV024672 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 CV024672 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 CV024672.