Maize Inbred PH11YK Trait Segmentation and Hybrid 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, particularly in achieving stable and high-yielding hybrids with improved agronomic quality.
Innovation Solution
Development of the novel maize variety PH11YK, which is a homozygous inbred line with specific traits introgressed through backcross conversion and transformation, allowing for the creation of hybrid seeds and plants with enhanced resistance to diseases and environmental stresses, along with improved yield and maturity characteristics.
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 to crop maturity is extended and yield uniformity is reduced
Solution Approach 1:
The breeding program segments the trait combination process into distinct phases: first developing inbred lines with specific disease resistances (Gray Leaf Spot, Northern Leaf Blight, Head Smut), then systematically crossing and selecting to combine these traits. This segmentation allows efficient tracking and combination of multiple resistance genes without extending the overall breeding timeline.
Solution Approach 2:
The patent applies preliminary action by pre-selecting and characterizing inbred lines for specific disease resistances before hybrid development. The inbred lines are screened and validated for resistance to multiple diseases in advance, so that when hybrids are developed, the resistance traits are already established and can be quickly combined without additional time-consuming selection phases.
2Reliability
If multiple desirable traits are combined in a single variety, then agronomic quality is improved, but the uniformity of plant characteristics such as germination, stand establishment, and maturity is reduced
Solution Approach 1:
The patent applies local quality by developing inbred lines that are homozygous and uniform for specific disease resistance traits, then combining these lines in hybrid crosses. Each parent line contributes specific localized traits (e.g., GLS resistance, NLB resistance) while maintaining overall uniformity in other characteristics like germination and maturity. This allows the hybrid to exhibit multiple resistance traits without sacrificing uniformity in other agronomic qualities.
3Reliability
If backcross conversion and transformation are used to introgress traits, then disease resistance and stress tolerance are enhanced, but the complexity of the breeding process increases
Solution Approach 1:
The patent uses inbred lines as intermediaries to facilitate trait introgression. Instead of directly crossing diverse sources of stress tolerance, the program develops specific inbred lines that serve as mediators, carrying validated stress tolerance and disease resistance traits. These intermediary inbred lines simplify the breeding process by providing pre-characterized genetic material that can be systematically combined in hybrid crosses, reducing the overall complexity of the breeding program.
Data Source
AI summary
A novel maize variety designated PH11YK and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH11YK with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH11YK 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 PH11YK or a locus conversion of PH11YK with another maize variety.