Hybrid Corn CH887239 Breeding Segmentation
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid plants with desirable traits such as high yield, disease resistance, and uniform germination due to genetic non-uniformity and unpredictability in cross-pollination, requiring the development of stable inbred plants and specific breeding methods.
Innovation Solution
The development of the hybrid corn variety CH887239, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmic-male sterility and transgenes integrated through genetic transformation, along with tissue culture techniques for regenerating plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross-pollination is used to develop hybrid corn plants, then genetic diversity and yield potential are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred lines through self-pollination to ensure genetic uniformity, then crossing these standardized lines to produce hybrids. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred parent lines are developed and standardized before the hybrid crossing stage. This preliminary action of creating genetically uniform parent lines ensures that the subsequent cross-pollination produces predictable and uniform hybrid offspring with consistent traits.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity is improved, but genetic diversity and adaptability worsen
Solution Approach 1:
The breeding program segments the population into separate inbred lines that are developed independently through self-pollination. Each line achieves high genetic uniformity within itself, while the collection of diverse lines maintains overall genetic diversity for the breeding program.
Solution Approach 2:
Different inbred lines are developed with different genetic compositions and specialized traits. Each line has local genetic quality optimized for specific characteristics, and these lines are later combined through crossing to achieve both uniformity within hybrids and diversity across the breeding program.
3Adaptability or versatility
If multiple breeding methods are used to combine desirable traits, then trait diversity is improved, but breeding complexity and time required worsen
Solution Approach 1:
The patent employs multiple breeding techniques (pedigree breeding, recurrent selection, genetic transformation) within a unified hybrid corn breeding framework. Each method serves different functions but all contribute to the common goal of developing superior hybrid varieties, reducing overall program complexity.
Solution Approach 2:
Homozygous inbred lines serve as intermediaries that facilitate the combination of desirable traits. These standardized inbred lines act as building blocks that can be systematically crossed to combine multiple traits, simplifying the breeding process compared to direct multi-trait selection.
4Measurement precision
If extensive evaluation of hybrid crosses is performed, then selection accuracy is improved, but time and resources required worsen
Solution Approach 1:
Comprehensive evaluation protocols are established in advance for assessing hybrid crosses. By pre-defining selection criteria and evaluation methods, the breeding program can efficiently screen multiple crosses without ad hoc delays, maintaining high selection accuracy while reducing evaluation time.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH887239. The invention thus relates to the plants, seeds and tissue cultures of the variety CH887239, and to methods for producing a corn plant produced by crossing a corn plant of variety CH887239 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 CH887239.