PYB 1094 Lettuce Genetic Resistance to Corky Root
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Solution Overview
Problem
Current lettuce varieties are susceptible to corky root disease, leading to significant crop loss, and existing control methods like fumigants are costly for large-scale commercial application.
Innovation Solution
Development of a lettuce variety, PYB 1094, using the pedigree breeding method, which combines resistance to corky root disease with desirable traits like early maturity, uniform heading, and medium head size, achieved through selective crossing and self-pollination of resistant lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fumigants such as dazomet, metam sodium and methyl bromide+chloropicrin are applied to control corky root, then disease control effectiveness is improved, but cultivation cost increases significantly
Solution Approach 1:
The patent converts the harmful effect of corky root disease into a beneficial outcome by developing lettuce varieties with genetic resistance to the disease. Instead of using chemical fumigants to control the disease, the solution is to breed plants that are inherently resistant, thereby eliminating the need for expensive chemical treatments while maintaining effective disease control.
Solution Approach 2:
The patent changes the biological parameter of the lettuce plant by introducing genetic resistance to corky root disease. Through pedigree breeding methods, the resistance trait is incorporated into the plant's genetic makeup, transforming the plant's susceptibility parameter from vulnerable to resistant, thereby achieving disease control without chemical interventions.
2Reliability
If pedigree breeding method is used to develop resistant lettuce variety, then disease resistance is improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-selecting parent lines with desired traits (early maturity, uniform heading, medium head size) and known disease resistance characteristics before initiating the breeding program. This preliminary selection of parental material with favorable traits accelerates the breeding process and reduces the time required to develop the final resistant variety.
Solution Approach 2:
The patent uses copying by maintaining and utilizing established breeding lines with known resistance traits. Instead of developing resistance from scratch, the program copies successful resistance traits from existing parental lines (such as PYB 4601 which has corky root resistance) into the new variety through controlled crossing and selection.
Data Source
AI summary
A lettuce variety with improved resistance to corky root disease is presented. The seed of the lettuce is designated as PYB 1094, a representative sample of which has been deposited under ATCC Accession Number PTA-9155. PYB 1094 is generally early maturing, medium green, and medium-head sized, and shows uniform heading. The invention is also directed to a method of making an F1 hybrid lettuce variety by crossing a plant grown from the seed of PYB 1094 with another plant and selecting a seed from said crossing.