Maize Variety PHP5D Backcross Conversion for Disease Resistance
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniform plant characteristics, which are essential for efficient crop production and mechanical harvesting.
Innovation Solution
Development of the maize variety PHP5D, which involves crossing with other maize plants to introduce desired traits through backcross conversion and transformation, resulting in a hybrid with improved resistance to diseases and environmental stresses, along with enhanced agronomic qualities.
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 becomes difficult to maintain
Solution Approach 1:
The patent applies parameter changes by modifying specific genetic parameters through backcross conversion and transformation techniques. The maize variety PHP5D was developed by changing the genetic composition through controlled backcrossing to introduce disease resistance and stress tolerance traits while maintaining uniformity of plant characteristics through precise genetic parameter control.
Solution Approach 2:
The patent uses an intermediary approach through backcross conversion processes. Intermediate backcross generations were used to gradually introduce desired traits (disease resistance, drought tolerance) into the PHP5D variety while maintaining the uniformity of plant characteristics through controlled selection and multiple backcrossing steps.
2Productivity
If mechanical harvesting is implemented, then crop production efficiency is improved, but uniformity of plant characteristics such as plant height and ear height becomes critical
Solution Approach 1:
The patent maintains uniformity of plant height and ear height parameters through controlled genetic modification. The backcross conversion process carefully controlled these morphological parameters to ensure uniformity that is essential for mechanical harvesting, while improving productivity through the introduction of disease resistance and stress tolerance traits.
3Reliability
If backcross conversion and transformation are used to introduce desired traits, then resistance to diseases and environmental stresses is improved, but the complexity of the breeding process increases
Solution Approach 1:
The patent uses backcross conversion as an intermediary process to introduce desired traits. Multiple backcrossing steps were employed as intermediate stages to gradually integrate disease resistance and stress tolerance genes into the PHP5D variety, managing the complexity through systematic incremental changes rather than single-step transformations.
Solution Approach 2:
The patent applies preliminary action through preliminary backcrossing steps before final variety development. The breeding process included preliminary backcross generations that prepared the genetic background for introducing complex traits like disease resistance and drought tolerance, breaking down the complex breeding process into manageable preliminary stages.
Data Source
AI summary
A novel maize variety designated PHP5D and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PHP5D with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHP5D 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 PHP5D or a trait conversion of PHP5D with another maize variety. Inbred maize varieties derived from maize variety PHP5D, methods for producing other inbred maize varieties derived from maize variety PHP5D and the inbred maize varieties and their parts derived by the use of those methods.