Corn Variety CV193693 Breeding Segmentation
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods face challenges in developing 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 CV193693, which includes a cytoplasmic or nuclear factor for male sterility and specific genetic loci conferring traits like herbicide tolerance, disease resistance, and modified metabolism, along with tissue culture techniques for regenerating plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine genetic traits, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding program segments the breeding population into distinct groups: recurrent parent plants, donor parent plants, and selected hybrid plants. This segmentation allows controlled cross-pollination between specific segments while maintaining genetic uniformity within each segment through selective breeding and backcrossing operations.
Solution Approach 2:
The method performs preliminary selection of donor parent plants with desired traits before crossing. By pre-selecting plants with specific herbicide tolerance, disease resistance, or other desirable characteristics, the breeding program ensures that only plants with proven desirable traits are used for cross-pollination, improving predictability of the resulting hybrids.
2Stability of the object's composition
If multiple generations of breeding are conducted to develop stable inbreds, then genetic stability is improved, but breeding time and complexity increase
Solution Approach 1:
The breeding program maintains continuous useful action by simultaneously advancing multiple breeding lines in parallel. Instead of sequentially developing one inbred line at a time, multiple recurrent parent lines and donor parent lines are bred and crossed concurrently, reducing overall breeding time while maintaining genetic stability through continuous selective breeding.
Solution Approach 2:
The method uses partial backcrossing rather than requiring complete homozygosity for several generations. By performing a limited number of backcrosses (typically 1-3 generations) to the recurrent parent, the program achieves sufficient genetic stability and uniformity for commercial deployment without the time-consuming requirement of developing completely homozygous inbred lines.
3Stability of the object's composition
If strict selection criteria are applied to ensure uniformity, then genetic consistency is improved, but selection difficulty and resource requirements increase
Solution Approach 1:
The breeding program uses self-service mechanisms where the recurrent parent plant serves as both the genetic background provider and the selection reference. By repeatedly backcrossing to the same recurrent parent, the program automatically maintains genetic consistency without requiring complex external selection criteria, as the recurrent parent's uniform phenotype serves as the built-in selection standard.
Solution Approach 2:
The method uses visible phenotypic markers (such as plant color, leaf morphology, or other easily observable traits) as selection criteria. These phenotypic changes serve as visual indicators of genetic consistency, allowing breeders to quickly identify and select plants that maintain the recurrent parent's uniform characteristics without requiring complex molecular analysis.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV193693. The invention thus relates to the plants, seeds and tissue cultures of the variety CV193693, and to methods for producing a corn plant produced by crossing a corn plant of variety CV193693 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 CV193693 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 CV193693.