Maize Inbred PH47K2 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 creating stable, high-yielding maize varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics across various conditions and environments.
Innovation Solution
The introduction of the novel maize variety PH47K2, which involves crossing with other maize plants to introduce desired traits through backcross conversion, genetic manipulation, and transformation, and the use of cytoplasmic or nuclear factors for male sterility to prevent self-pollination, allowing for the production of hybrid seeds with enhanced characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to develop new varieties with desirable traits, then the varieties achieve stability and high yield, but the development process takes six to twelve years
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred line PH47K2 with specific desirable traits (disease resistance, drought tolerance, yield potential) before hybrid development. This preliminary characterization allows breeders to start hybrid crossing with a pre-validated parent line, reducing the time needed for variety stabilization while maintaining reliability.
Solution Approach 2:
The patent utilizes copying by creating hybrid varieties that replicate and combine the desirable traits of PH47K2 with other inbred lines. The hybrid seeds copy the beneficial genetic characteristics of the parent lines, allowing rapid propagation of stable, high-yielding varieties without requiring lengthy breeding cycles to establish new trait combinations.
2Productivity
If multiple desirable traits are combined in a single maize variety, then the variety achieves maximal yield across different conditions, but the breeding process becomes more complex and time-consuming
Solution Approach 1:
The patent applies merging by combining multiple desirable traits from different inbred lines into hybrid PH47K2 and its derivatives. The hybrid inherits disease resistance, drought tolerance, and yield potential from PH47K2 while incorporating additional traits from complementary parent lines, achieving maximal yield across different conditions through trait consolidation.
Solution Approach 2:
The patent implements universality by developing PH47K2 as a versatile inbred line that serves multiple functions: it provides disease resistance, drought tolerance, and high yield potential. This multi-functional parent line can be used in various hybrid combinations and environmental conditions, reducing breeding complexity by having a single versatile genotype that addresses multiple productivity requirements.
3Stability of the object's composition
If inbred seed populations are maintained as essentially homogeneous to prevent hybrid contamination, then variety purity is preserved, but seed production requires careful isolation and management
Solution Approach 1:
The patent applies taking out by extracting and isolating the inbred PH47K2 seed population from hybrid seed production environments. This physical separation prevents contamination between inbred and hybrid seeds, maintaining the essential homogeneity of the inbred population while allowing dedicated production fields for the inbred line.
Solution Approach 2:
The patent uses spatial isolation as an intermediary mechanism to separate inbred seed production from hybrid seed production. By establishing physical barriers and isolation distances between inbred and hybrid fields, the system maintains inbred population homogeneity while facilitating easier seed production through defined production zones and reduced contamination risk.
Data Source
AI summary
A novel maize variety designated PH47K2 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH47K2 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH47K2 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 PH47K2 or a locus conversion of PH47K2 with another maize variety.