Maize Inbred 1PNDA25 for Backcrossed Trait Stability
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that requires years to combine desirable traits such as disease resistance, drought tolerance, and high yield, posing challenges in efficiently producing stable and agronomically sound maize varieties.
Innovation Solution
The development of a novel maize variety, 1PNDA25, with introgressed traits like male sterility, disease resistance, and improved agronomic characteristics through backcross conversion, genetic manipulation, and transformation, along with processes for producing hybrid maize seeds and plants, including methods to prevent self-pollination and enhance cross-pollination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize variety development processes are used to combine desirable traits, then disease resistance, drought tolerance, and high yield are achieved, but the development time becomes excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-introgressing desirable traits into the inbred line 1PNDA25 through backcrossing before hybrid formation. This allows the inbred line to already possess disease resistance, drought tolerance, and other favorable traits, eliminating the need for lengthy post-crossing selection and acceleration the variety development process significantly
Solution Approach 2:
The patent uses an intermediary inbred line (1PNDA25) that serves as a bridge between traditional breeding and modern hybrid development. This inbred line acts as a mediator that carries pre-selected desirable traits and can be crossed with other inbreds to produce hybrids with predictable and improved performance, reducing overall development time
2Adaptability or versatility
If multiple desirable traits are combined through traditional breeding, then agronomic soundness and yield stability are improved, but the breeding process complexity increases
Solution Approach 1:
The patent segments the breeding process into distinct phases: first developing inbred line 1PNDA25 with specific desirable traits through backcrossing, then using this pre-developed inbred line as a parent in hybrid crosses. This segmentation simplifies the overall process by breaking down complex multi-trait breeding into manageable stages with clear objectives
Solution Approach 2:
The patent applies parameter changes by modifying the genetic composition of inbred line 1PNDA25 through controlled backcrossing with donors possessing specific traits. This allows systematic introduction of desirable traits while maintaining other favorable characteristics, managing breeding complexity through controlled genetic parameter adjustment
3Stability of the object's composition
If inbred lines are developed with multiple backcrosses to introgress traits, then trait stability is improved, but the number of breeding steps increases
Solution Approach 1:
The patent performs preliminary action by completing multiple backcrosses to stabilize traits in inbred line 1PNDA25 before the hybrid formation stage. This preliminary stabilization ensures that when the inbred line is used in crosses, the desirable traits are already fixed and will be reliably transmitted to hybrids, reducing the need for additional stabilization steps later
Data Source
AI summary
A novel maize variety designated 1PNDA25 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety 1PNDA25 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into 1PNDA25 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 1PNDA25 or a locus conversion of 1PNDA25 with another maize variety.