Abstract
Extraction of high-quality, high molecular weight DNA is a critical step for sequencing an organism's genome. For fungi, DNA extraction is often complicated by co-precipitation of secondary metabolites, the most destructive being polysaccharides, polyphenols, and melanin. Different DNA extraction protocols and clean-up methods have been developed to address challenging materials and contaminants; however, the method of fungal cultivation and tissue preparation also plays a critical role to limit the production of inhibitory compounds prior to extraction. Here, we provide protocols and guidelines for (i) fungal tissue cultivation and processing with solid media containing a cellophane overlay or in liquid media, (ii) DNA extraction with customized recommendations for taxonomically and ecologically diverse plant-associated fungi, and (iii) assessing DNA quantity and quality for downstream genome sequencing with single-molecule technology such as PacBio.
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