Autoflowering Cannabis Marker-Assisted Selection
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Solution Overview
Problem
Traditional breeding methods for creating autoflowering Cannabis varieties are laborious and time-consuming, relying on selecting segregated traits over multiple generations.
Innovation Solution
The use of markers and allelic variations of the UPF2 and/or RAP2-7/TOE1 genes for selecting autoflowering attributes through marker-assisted selection, involving nucleic acid analysis and oligonucleotide probes to identify specific polymorphisms in the Cannabis genome, such as those at positions 65,423,973 and 65,457,650 on chromosome 1, to efficiently produce autoflowering plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to create autoflowering varieties, then the desired autoflowering phenotype can be achieved, but the process becomes laborious and time-consuming
Solution Approach 1:
The patent applies preliminary action by developing and utilizing molecular markers (SNPs) that are identified and characterized before breeding operations begin. These markers are associated with autoflowering genes (UPF2, RAP2.7/TOE1) and can predict the autoflowering phenotype in advance, allowing breeders to select parent plants and progeny based on marker presence rather than waiting for phenotypic expression after multiple generations of growth and observation
Solution Approach 2:
The patent replaces the mechanical/physical system of traditional phenotypic selection (visual observation, manual tracking, multi-generation growth cycles) with a molecular/biochemical system using DNA marker analysis. Instead of growing plants through multiple generations to observe flowering behavior, the invention uses oligonucleotide probes and PCR-based methods to detect specific SNP markers in plant tissue, substituting lengthy biological processes with rapid molecular assays that can be performed on small tissue samples
2Reliability
If traditional breeding methods are used to create autoflowering varieties, then the desired autoflowering phenotype can be achieved, but the process becomes laborious
Solution Approach 1:
The patent replaces the mechanical/physical system of traditional phenotypic selection (visual observation, manual tracking, multi-generation growth cycles) with a molecular/biochemical system using DNA marker analysis. Instead of growing plants through multiple generations to observe flowering behavior, the invention uses oligonucleotide probes and PCR-based methods to detect specific SNP markers in plant tissue, substituting lengthy biological processes with rapid molecular assays that can be performed on small tissue samples
Solution Approach 2:
The patent introduces molecular markers (SNPs) as intermediaries between the autoflowering genes and the phenotypic expression. These markers serve as detectable indicators that mediate the selection process, allowing breeders to indirectly assess the presence of autoflowering traits without directly observing the complex flowering phenotype. The markers act as proxies that simplify the selection criterion from a complex multi-generational phenotypic assessment to a simple molecular detection assay
Data Source
AI summary
Provided herein is the identification and markers and genes associated with day-neutral autoflowering in plants and their use in selecting plants, including Cannabis plants, having autoflowering activity. The markers are useful for breeding autoflowering plants by obtaining nucleic acids, detecting one or more markers that indicate autoflowering activity, and establishing plant lines having such characteristics. Also provided are methods of editing plants to establish plant lines having autoflowering allelic variations.