Maize HID2388 Breeding Segmentation for Yield and Vigor
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Solution Overview
Problem
The challenge in corn breeding is to develop maize plants that combine high yield, disease resistance, and adaptability to various environmental conditions, while also addressing issues like reduced vigor in inbred lines and the need for specific traits in different regions of the Corn Belt.
Innovation Solution
The development of the maize variety HID2388, which includes specific traits such as increased water stress resistance, waxy starch, male sterility, and disease resistance, achieved through traditional breeding methods and potentially enhanced by genetic markers and transgenic approaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inbred lines are used for breeding, then homozygosity and uniformity are improved, but plant vigor and seed production capability deteriorate
Solution Approach 1:
The patent divides the breeding program into distinct segments: using inbred lines for genetic uniformity in specific breeding contexts, while employing hybrid seeds for commercial production where vigor is needed. The inbreds are used as parental lines that are emasculated and pollinated to create F1 hybrids, which then produce F2 grain. This segmentation allows each line to fulfill its specific function - inbreds provide genetic stability for breeding, while hybrids provide vigor for seed production.
Solution Approach 2:
The F1 hybrid acts as an intermediary between the inbred parental lines and the final F2 grain. The F1 generation combines the genetic material from two homozygous inbreds to create heterozygous plants that exhibit hybrid vigor. This intermediary step allows the breeding program to maintain the benefits of inbred homozygosity while producing vigorous F1 plants that can successfully produce F2 grain, thus resolving the contradiction between homozygosity and vigor.
2Reliability
If F1 hybrid seeds are produced from inbred lines, then plant vigor and seed yield are improved, but the complexity of the breeding process increases
Solution Approach 1:
The F1 hybrid plants are self-pollinating, allowing them to produce F2 grain without requiring external intervention for pollination. The emasculated inbred plants automatically receive pollen from the male-sterile inbred, and the resulting F1 hybrids self-pollinate to produce the F2 generation. This self-service mechanism simplifies the breeding process by eliminating the need for manual pollination operations while maintaining the vigor benefits of hybrid seeds.
3Adaptability or versatility
If traditional breeding methods are used, then adaptability to environmental conditions is improved, but the time required for development increases
Solution Approach 1:
The patent employs preliminary action by using inbred lines that have been pre-developed and characterized for specific traits and environmental adaptability. These inbreds are selected and maintained as parental lines before the actual hybridization occurs. By preparing the inbred parental lines in advance with desired traits, the F1 hybrid production can proceed more quickly, reducing the overall breeding development time while maintaining environmental adaptability through the use of pre-selected, adapted inbred lines.
Data Source
AI summary
The present invention provides an inbred corn line designated HID2388, methods for producing a corn plant by crossing plants of the inbred line HID2388 with plants of another corn plant. The invention further encompasses all parts of inbred corn line HID2388, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line HID2388, and plants produced according to these methods.