Corn Variety CV663768 Breeding for Predictable Hybrid Performance
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like higher yield, disease resistance, and uniformity, but existing methods struggle to produce 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 CV663768, which includes a cytoplasmic or nuclear factor for male sterility to prevent self-pollination, along with genetic modifications such as single locus conversions for traits like herbicide tolerance and disease resistance, and tissue cultures capable of regenerating plants with consistent morphological and physiological 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 increases leading to unpredictable hybrid performance
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing uniform homozygous inbred lines through self-pollination, then crossing these standardized lines to produce hybrids. This segmentation allows trait combination while maintaining predictability by ensuring parental uniformity before crossing.
Solution Approach 2:
Homozygous inbred plants are developed in advance through multiple generations of self-pollination and selection before the crossing step. This preliminary action ensures that parental lines are genetically uniform and stable, which then ensures predictable hybrid performance when crossed.
2Reliability
If self-pollination is used to produce uniform homozygous inbred plants, then genetic uniformity and predictability are improved, but ability to combine traits from different plants is limited
Solution Approach 1:
Multiple homozygous inbred lines, each developed through self-pollination for uniformity, are merged through controlled cross-pollination to create hybrid offspring that combine desirable traits from different parental lines while maintaining overall uniformity within the hybrid population.
3Reliability
If male sterility factors are introduced to prevent self-pollination, then cross-pollination control is improved, but plant complexity increases
Solution Approach 1:
The plant's own genetic system is utilized to control pollination. Male sterility factors (cytoplasmic or nuclear) are introduced that cause the plant to naturally prevent self-pollination through mechanisms like self-incompatibility, eliminating the need for external emasculation or manual intervention.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV663768. The invention thus relates to the plants, seeds and tissue cultures of the variety CV663768, and to methods for producing a corn plant produced by crossing a corn plant of variety CV663768 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 CV663768 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 CV663768.