Hybrid Corn CH101172 Breeding via Cytoplasmic Male Sterility
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing hybrid varieties that combine desirable traits such as high yield, disease resistance, and uniformity, while maintaining genetic stability and avoiding self-pollination, which limits the introduction of new genetic loci and cytoplasmic traits.
Innovation Solution
The development of the hybrid corn variety CH101172, which incorporates genetic modifications for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmic male sterility and genetic transformation techniques to introduce specific alleles and transgenes, and employs tissue culture methods for regenerating plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If self-pollination is allowed in corn breeding, then genetic stability is maintained, but introduction of new genetic loci and cytoplasmic traits is limited
Solution Approach 1:
The patent applies preliminary action by developing male-sterile inbred lines before hybridization, preventing self-pollination in advance. This ensures that the hybrid population receives new genetic loci from cross-pollination while maintaining controlled genetic composition through pre-established sterility mechanisms.
Solution Approach 2:
The patent uses male-sterility as an intermediary mechanism to control pollination. By introducing a sterility factor that can be later restored, the system enables introduction of new genetic material through controlled cross-pollination while maintaining genetic stability through the restorer gene mechanism.
2Ease of operation
If male sterility is introduced to prevent self-pollination, then cross-pollination control is improved, but breeding complexity increases
Solution Approach 1:
The patent applies parameter changes by utilizing cytoplasmic male sterility, which changes the fertility parameter of the plant. This biological parameter change provides automatic cross-pollination control without requiring mechanical or chemical interventions, simplifying the overall breeding operation despite the genetic complexity.
3Productivity
If hybrid varieties are developed through cross-pollination, then yield and disease resistance are improved, but uniformity in germination and growth is reduced
Solution Approach 1:
The patent applies local quality by ensuring that while the hybrid population has genetic diversity for yield and resistance, the cytoplasmic background remains uniform. This local uniformity in cytoplasmic factors (such as mitochondrial and chloroplast genes) maintains consistent germination and growth characteristics, while nuclear genetic diversity provides the desired productivity improvements.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH101172. The invention thus relates to the plants, seeds and tissue cultures of the variety CH101172, and to methods for producing a corn plant produced by crossing a corn plant of variety CH101172 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 CH101172.