Guayule Cultivar With Stable Traits Despite Slower Growth
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Solution Overview
Problem
Existing guayule cultivars like AZ-2 exhibit variations in phenotypic characteristics under different environmental conditions, and there is a need for a cultivar with stable and unique features that can be reproduced true-to-type across generations.
Innovation Solution
The development of the 'E-B2WN-13167' cultivar, derived from controlled irradiation of AZ-2 seeds, which exhibits reduced internode lengths, shorter peduncles, thicker leaves, lower flower numbers, and slower growth, with stable characteristics maintained through vegetative propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If controlled irradiation is applied to guayule seeds, then phenotypic stability and true-to-type reproduction are improved, but growth rate and productivity are reduced
Solution Approach 1:
The patent applies controlled irradiation to change the genetic parameters of guayule plants, creating a new cultivar with stable phenotypic characteristics. The irradiation induces mutations that result in reduced internode lengths, shorter peduncles, thicker leaves, and lower flower numbers, while maintaining true-to-type reproduction across generations. This parameter change resolves the contradiction by prioritizing phenotypic stability over rapid growth.
2Stability of the object's composition
If vegetative propagation is used for reproduction, then phenotypic consistency across generations is improved, but genetic diversity is reduced
Solution Approach 1:
The patent applies preliminary irradiation treatment to the seed stock before propagation to induce desired phenotypic changes. This preliminary action creates a genetically modified base population that will consistently reproduce the desired traits through vegetative propagation, ensuring phenotypic consistency while having already incorporated the necessary genetic variation through the irradiation-induced mutations.
3Shape
If reduced internode lengths and shorter peduncles are achieved, then plant compactness and rubber content are improved, but overall plant size and biomass are reduced
Solution Approach 1:
The patent creates local quality changes in specific plant parts through controlled irradiation, resulting in reduced internode lengths and shorter peduncles while maintaining or enhancing rubber content in those localized areas. This allows the plant to achieve a more compact shape with higher rubber concentration in key tissues, even though the overall plant biomass is reduced. The quality of rubber production is improved locally despite the reduction in total plant volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The 'E-B2WN-13167' cultivar demonstrates consistent characteristics across generations, including reduced internodes, shorter peduncles, and lower flower production, making it suitable for commercial applications such as rubber production, ethanol, and hypoallergenic latex, while maintaining resistance to pests and diseases.
Implementation Method 1
In 2016, a bulk seed lot of germplasm from AZ-2 was subjected to fast neutron irradiation
Data Source
AI summary
A new and distinct cultivar of Parthenium argentatum named E-B2WN-13167 is disclosed, characterized by reduced internode lengths, shorter leaf peduncles, thicker leaves, lower number of flowers, aborted seed production, and slower growth.