Sugarcane Transformation Using Morphogenes for Recalcitrant Genotypes
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Solution Overview
Problem
The complexity of the sugarcane genome and recalcitrance to transformation and tissue culture pose challenges in developing commercial cultivars, particularly in elite varieties, necessitating improved methods for sugarcane cell transformation and genomic modification.
Innovation Solution
The use of morphogenic sequences, including specific nucleotide and protein sequences (SEQ IDs), combined with genome editing components like CRISPR/Cas, to enhance transformation efficiency and genomic modification, reducing genotype dependence and improving the number and quality of transgenic events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional transformation methods are used in sugarcane, then the transformation process can be performed, but transformation efficiency is low and genotype-dependent recalcitrance occurs
Solution Approach 1:
The patent changes key parameters of the transformation system by introducing morphogenic genes (WUS, LEC2, BBM, GRF5, SERK1) that alter the physiological state of sugarcane cells. These genes modify parameters such as cell division rate, embryogenic competence, and tissue regeneration capacity, thereby improving transformation efficiency across different genotypes and reducing recalcitrance.
Solution Approach 2:
The morphogenic genes act as intermediaries between the transformation method and the sugarcane genome. These genes mediate the transformation process by enhancing cell plasticity and regenerative capacity, serving as a bridge that enables efficient transformation even in recalcitrant elite varieties without requiring extensive optimization for each genotype.
2Adaptability or versatility
If elite sugarcane germplasm is used, then commercial cultivar development is achieved, but recalcitrance to transformation and tissue culture increases
Solution Approach 1:
The patent applies preliminary action by introducing morphogenic genes into the elite sugarcane germplasm before the actual transformation event. This pre-treatment enhances the cells' receptivity to transformation by activating embryogenic pathways and improving tissue culture response, thereby making subsequent transformation procedures easier and more reliable in commercial cultivars.
Solution Approach 2:
The morphogenic genes induce parameter changes in elite germplasm that favor transformation. Specifically, they alter cell cycle dynamics, enhance cell wall permeability, and improve callus formation capacity, thereby reducing the technical difficulty of transforming commercially valuable elite varieties.
3Productivity
If current transformation methods are applied, then sugarcane transformation can be achieved, but the number and quality of independent transgenic events per variety is limited
Solution Approach 1:
The patent ensures continuity of useful action by maintaining high levels of morphogenic gene expression throughout the transformation and regeneration process. This continuous presence of WUS, LEC2, BBM, GRF5, and SERK1 genes sustains embryogenic competence and cell division activity, enabling the production of multiple high-quality independent transgenic events from a single transformation experiment.
Solution Approach 2:
The morphogenic genes induce parameter changes that favor both quantity and quality of transgenic events. They increase cell proliferation rate while maintaining genomic stability, enhance regeneration efficiency, and improve the uniformity of transgene integration, thereby simultaneously improving the number and quality of independent transgenic events.
Data Source
AI summary
Aspects of the present disclosure relate to methods and compositions for sugarcane transformation using morphogenic genes. In particular, the present disclosure relates to the use of morphogenic sequences that improve the efficiency of sugarcane cell or tissue transformation and genomic modification. The present disclosure further relates to genetically altered sugarcane cells, tissues, and plants produced using these methods and compositions.