Maize Variety PHV7Y Backcross Conversion for Yield and Lodging 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 uniformity, which are essential for efficient crop production and yield improvement.
Innovation Solution
Development of a novel maize variety, PHV7Y, with specific traits introgressed through backcross conversion and transformation, focusing on improved agronomic characteristics like resistance to diseases, insects, and environmental stresses, along with enhanced yield and lodging resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding techniques are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the time to crop maturity increases and yield uniformity decreases
Solution Approach 1:
The patent employs backcross conversion techniques where desired traits are introgressed into the PHV7Y variety through preliminary breeding actions. This allows the accumulation of desirable traits (disease resistance, drought tolerance) over multiple backcross generations before final variety development, thereby resolving the contradiction between achieving reliable trait combinations and reducing time to maturity.
2Reliability
If multiple desirable traits are combined through traditional breeding, then resistance to diseases and environmental stresses improves, but yield uniformity and genetic stability deteriorate
Solution Approach 1:
The patent applies local quality by introducing specific desirable traits into targeted locations within the PHV7Y genetic background through backcross conversion. This allows different parts of the genome to have different functions - maintaining the uniformity and genetic stability of the base variety while incorporating localized regions with disease resistance and stress tolerance genes, thus resolving the contradiction between environmental stress resistance and yield uniformity.
3Productivity
If mechanical harvesting requirements are met through uniform plant characteristics, then harvest efficiency improves, but breeding complexity increases
Solution Approach 1:
The PHV7Y variety serves multiple functions simultaneously: it provides uniform plant characteristics for mechanical harvesting, maintains genetic stability for consistent yield, and incorporates disease resistance and stress tolerance. The backcross conversion methodology allows this single variety to fulfill multiple breeding objectives, resolving the contradiction between harvest efficiency and breeding complexity.
Data Source
AI summary
A novel maize variety designated PHV7Y and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PHV7Y with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHV7Y 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 PHV7Y or a trait conversion of PHV7Y with another maize variety. Inbred maize varieties derived from maize variety PHV7Y, methods for producing other inbred maize varieties derived from maize variety PHV7Y and the inbred maize varieties and their parts derived by the use of those methods.