Maize Hybrid X05D973 Segmentation for Resistance and Yield
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as resistance to diseases and insects, heat, and drought tolerance with improved yield and agronomic quality, while maintaining uniformity and stability in hybrid crops.
Innovation Solution
Development of the hybrid maize variety X05D973, produced by crossing proprietary Pioneer Hi-Bred International inbred varieties, which incorporates locus conversions and transformation processes to introduce specific traits, enhancing resistance and yield while maintaining genetic integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease and insect resistance can be improved, but yield and agronomic quality may be compromised
Solution Approach 1:
The patent segments the breeding process by using separate inbred lines (PH1TW8 and PH1V5T) that each contribute specific desirable traits. One parent line contributes disease and insect resistance while the other contributes yield potential and agronomic quality. By dividing the trait portfolio across separate parental lines and combining them through hybridization, the patent resolves the contradiction between resistance and yield.
2Reliability
If multiple desirable traits are combined in a single hybrid, then resistance and yield can be improved, but uniformity of plant characteristics may deteriorate
Solution Approach 1:
The patent applies local quality by ensuring that each parental inbred line is highly homozygous and uniform for specific sets of traits. PH1TW8 is optimized for disease and insect resistance characteristics, while PH1V5T is optimized for yield and agronomic quality characteristics. The F1 hybrid inherits a consistent combination of these locally optimized traits from each parent, maintaining uniformity while achieving multiple desirable characteristics.
Solution Approach 2:
The patent changes the genetic parameter state by using highly inbred parental lines with fixed, homozygous genotypes. This ensures that the F1 hybrid produces a uniform population with consistent expression of multiple traits including disease resistance, yield, and agronomic characteristics. The inbreeding process stabilizes the genetic parameters of the parents, which then translate to uniformity in the hybrid progeny.
Data Source
AI summary
A novel maize variety designated X05D973 and seed, plants and plant parts thereof, produced by crossing Pioneer Hi-Bred International, Inc. proprietary inbred maize varieties. Methods for producing a maize plant that comprises crossing hybrid maize variety X05D973 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X05D973 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. This invention relates to the maize variety X05D973, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X05D973. This invention further relates to methods for producing maize varieties derived from maize variety X05D973.