Maize Inbred PH1DF7 Breeding via Segmentation and Merging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniformity, which are essential for efficient crop production and yield improvement.
Innovation Solution
The development of a novel maize variety, PH1DF7, which is a homozygous inbred line with specific traits introgressed through backcross conversion and transformation, allowing for improved resistance to various stresses and enhanced agronomic qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the time required for breeding and the complexity of the breeding process increase
Solution Approach 1:
The patent utilizes pre-developed inbred lines with known desirable traits (such as disease resistance and drought tolerance) that have already undergone extensive breeding and selection. By starting with these pre-characterized parental lines, the breeding process skips the time-consuming stages of trait discovery and initial selection, directly proceeding to hybridization and evaluation of specific target traits.
Solution Approach 2:
The patent employs molecular markers and genetic fingerprinting techniques to identify and select parental lines that carry specific desirable traits. This allows breeders to 'copy' or replicate known successful genetic combinations from previous breeding programs, rather than discovering new trait combinations through lengthy trial and error processes.
2Productivity
If multiple desirable traits are combined in a single variety, then yield and agronomic quality improve, but the uniformity of plant characteristics becomes difficult to maintain
Solution Approach 1:
The patent divides the complex task of combining multiple traits by using separate inbred parental lines, each specialized for specific traits (e.g., one parent for disease resistance, another for drought tolerance). This segmentation allows each parental line to be optimized independently for its specific function, and the hybrid combines these specialized contributions while maintaining uniformity through controlled cross-breeding.
Solution Approach 2:
Different regions of the genome are assigned different functions through the use of specific inbred lines. Each parental line contributes specific genomic regions with desired traits, allowing the hybrid to exhibit uniform overall characteristics while containing localized genetic variations that provide specific functionalities such as disease resistance in certain plant parts or drought tolerance under specific conditions.
3Manufacturing precision
If inbred lines are developed through extensive selfing and selection, then homozygosity and trait uniformity are achieved, but the genetic diversity required for future breeding is reduced
Solution Approach 1:
The patent merges multiple highly homozygous inbred lines through hybridization to create F1 hybrids that exhibit heterosis. This combining process restores genetic diversity at the hybrid level while each parental inbred line maintains its homozygosity and genetic stability. The system thus preserves both homozygosity in parental lines and genetic diversity in the hybrid progeny, serving different breeding objectives simultaneously.
Data Source
AI summary
A novel maize variety designated PH1DF7 and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1DF7 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1DF7 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PH1DF7 or a locus conversion of PH1DF7 with another maize variety.