Maize Inbred PH46C2 Breeding via Backcross Conversion
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, taking six to twelve years, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a single variety that is agronomically sound across different conditions and environments.
Innovation Solution
The introduction of the novel maize variety PH46C2, which involves crossing with other maize plants to introduce desired traits like male sterility, disease resistance, and improved agronomic characteristics through backcross conversion, genetic manipulation, and transformation, along with the use of cytoplasmic or nuclear factors to enhance breeding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to develop new maize varieties, then the variety can be agronomically sound and stable, but the development process takes six to twelve years
Solution Approach 1:
The patent applies preliminary action by using pre-existing inbred lines and synthetic varieties that have already been developed through traditional breeding. The new variety is created by crossing these pre-prepared materials, avoiding the need to start from scratch and thus reducing the overall breeding cycle time while maintaining agronomical soundness.
Solution Approach 2:
The breeding process is segmented into distinct phases: selection of pre-existing inbred lines, crossing them to create hybrid populations, selecting superior lines, and validating performance. This segmentation allows parallel processing and reduces the sequential time required compared to traditional step-by-step breeding.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety becomes more versatile and high-yielding, but the breeding complexity increases
Solution Approach 1:
The patent merges multiple desirable traits by crossing inbred lines that each possess specific traits (e.g., disease resistance, drought tolerance, high yield potential). The hybrid population combines these traits through recombination, and superior lines are selected that exhibit the desired combination, achieving versatility without requiring complex multi-step breeding programs.
Solution Approach 2:
The developed variety is designed to be universal by incorporating multiple functional traits that enable it to perform well across different environments and conditions. This multi-functionality is achieved through strategic selection of parental lines with complementary traits, allowing the same variety to adapt to various agricultural conditions.
3Productivity
If backcross conversion and genetic transformation are used to introduce traits, then the breeding time is reduced, but the genetic manipulation complexity increases
Solution Approach 1:
The patent uses backcross conversion as an intermediary method to introduce desired traits. A donor line with the target trait is crossed with the recurrent parent, and the process is repeated for several generations to achieve the trait integration. This intermediary approach simplifies the overall process compared to direct genetic transformation, reducing complexity while maintaining breeding speed.
Data Source
AI summary
A novel maize variety designated PH46C2 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH46C2 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH46C2 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby are provided. Hybrid maize seed, plants or plant parts are produced by crossing the variety PH46C2 or a locus conversion of PH46C2 with another maize variety.