Maize Inbred PH1DD3 Breeding for Disease Resistance and Uniformity
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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 mechanical harvesting.
Innovation Solution
The development of a novel maize variety, PH1DD3, which is a homozygous inbred line with improved traits achieved through selective breeding, backcrossing, and potential genetic modifications, allowing for the introduction of specific desirable characteristics such as resistance to diseases and environmental stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then resistance to diseases and insects, resistance to heat and drought, and greater yield can be achieved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, maturity, plant height and ear height may be compromised
Solution Approach 1:
The patent applies parameter changes by modifying specific genetic parameters through selective breeding and backcrossing to achieve both disease resistance and uniformity. The inbred line PH1DD3 was developed through controlled crosses and multiple backcrosses to fix desirable traits while maintaining homogeneous plant characteristics, demonstrating how genetic parameters can be adjusted to resolve the contradiction between resistance and uniformity
2Productivity
If mechanical harvesting is implemented, then crop production efficiency is improved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, maturity, plant height and ear height becomes critical
Solution Approach 1:
The patent applies preliminary action by establishing uniform plant characteristics during the breeding and early growth stages. The inbred line PH1DD3 was developed through controlled crosses and multiple backcrosses to fix desirable traits before field deployment, ensuring uniformity of plant characteristics is established in advance to support subsequent mechanical harvesting operations
3Reliability
If backcross conversion and transformation are used to introduce specific traits, then resistance to diseases and environmental stresses is improved, but the complexity of the breeding process increases
Solution Approach 1:
The patent applies segmentation by dividing the complex breeding process into distinct manageable stages: initial cross between PH4RF and PHCPR, followed by multiple backcrosses to PH4RF, and final selfing to produce homozygous inbred PH1DD3. This segmentation of the breeding process into sequential steps with specific objectives at each stage reduces the overall complexity while achieving multiple resistance traits
Data Source
AI summary
A novel maize variety designated PH1DD3 and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1DD3 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1DD3 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 PH1DD3 or a locus conversion of PH1DD3 with another maize variety.