Solid King Romaine Lettuce Cultivar Corky Root Rot Resistance
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Solution Overview
Problem
Current lettuce cultivars lack resistance to corky root rot, tip burn, and have suboptimal size uniformity, head weight, and color traits, which affect yield and market appeal.
Innovation Solution
Development of the 'Solid King' lettuce cultivar, which is bred for larger frame size, heavier weight, shorter core length, glossy leaf color, solid midribs, and resistance to corky root rot and tip burn, through a combination of cross-breeding and backcrossing techniques, incorporating desirable traits from parental lines like Sunbelt and DF-7.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lettuce cultivars are used, then cultivation is simple, but resistance to corky root rot is lacking
Solution Approach 1:
The patent combines multiple desirable traits from different parental lines (Sunbelt, DF-7, and other romaine varieties) through systematic cross-breeding and backcrossing to create a single cultivar that exhibits resistance to corky root rot, tip burn resistance, improved size uniformity, and desirable color traits simultaneously
Solution Approach 2:
The breeding program performed preliminary actions by conducting multiple generations of cross-breeding and backcrossing before final cultivar release, establishing resistance traits and uniformity characteristics in advance through careful selection and evaluation over several years
2Manufacturing precision
If conventional lettuce cultivars are used, then production is straightforward, but size uniformity is suboptimal
Solution Approach 1:
The breeding program implemented feedback mechanisms by evaluating plants at multiple stages (seedling, mature plant, head formation) for size uniformity, head weight, and other characteristics, using this information to select superior individuals for the next generation and refine the cultivar's uniformity traits
Solution Approach 2:
The patent achieved improved size uniformity by changing genetic parameters through selective breeding, focusing on specific traits such as head weight, diameter, and core length to produce more consistent marketable products
3Weight of stationary object
If conventional lettuce cultivars are used, then cultivation is simple, but head weight is insufficient
Solution Approach 1:
The breeding program focused on improving specific local qualities of the lettuce head, including head weight, core length, and leaf color, while maintaining overall plant architecture and growth habits suitable for commercial production
4Reliability
If conventional lettuce cultivars are used, then production is straightforward, but tip burn resistance is lacking
Solution Approach 1:
The patent combines multiple desirable traits from different parental lines (Sunbelt, DF-7, and other romaine varieties) through systematic cross-breeding and backcrossing to create a single cultivar that exhibits resistance to corky root rot, tip burn resistance, improved size uniformity, and desirable color traits simultaneously
5Ease of manufacture
If conventional lettuce cultivars are used, then cultivation is simple, but color traits are suboptimal
Solution Approach 1:
The breeding program focused on improving specific local qualities of the lettuce head, including head weight, core length, and leaf color, while maintaining overall plant architecture and growth habits suitable for commercial production
Data Source
AI summary
According to the invention, there is provided a novel romaine lettuce cultivar, designated Solid King. ‘Solid King’ is described as a vigorous romaine cultivar with large frame size and heavier weight, short core length, savoyed and glossy leaf color, corky root rot resistance, no fringe burn on mature leaves and also yellower heart leaf color with a solid mid rib. This invention thus relates to the seeds of lettuce cultivar Solid King, to the plants of lettuce cultivar Solid King, to plant parts of lettuce cultivar Solid King, to methods for producing a lettuce cultivar by crossing the lettuce cultivar Solid King with another lettuce cultivar, and to methods for producing a lettuce cultivar containing in its genetic material one or more backcross conversion traits or transgenes and to the backcross conversion lettuce plants and plant parts produced by those methods.