Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 536872
Title Intact DNA purified from flow-sorted nuclei unlocks the potential of next-generation genome mapping and assembly in Solanum species
Author(s) Gaiero, Paola; Šimková, Hana; Vrána, Jan; Santiñaque, Federico F.; López-Carro, Beatriz; Folle, Gustavo A.; Belt, José van de; Peters, Sander A.; Doležel, Jaroslav; Jong, Hans de
Source MethodsX 5 (2018). - ISSN 2215-0161 - p. 328 - 336.
Department(s) Laboratory of Genetics
PRI BIOS Applied Bioinformatics
Groep KoornneefGroep Koornneef
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) BioNano genome mapping - Flow sorting - Genome finishing - HMW DNA isolation
Abstract Next-generation genome mapping through nanochannels (Bionano optical mapping) of plant genomes brings genome assemblies to the ‘nearly-finished’ level for reliable and detailed gene annotations and assessment of structural variations. Despite the recent progress in its development, researchers face the technical challenges of obtaining sufficient high molecular weight (HMW) nuclear DNA due to cell walls which are difficult to disrupt and to the presence of cytoplasmic polyphenols and polysaccharides that co-precipitate or are covalently bound to DNA and might cause oxidation and/or affect the access of nicking enzymes to DNA, preventing downstream applications. Here we describe important improvements for obtaining HMW DNA that we tested on Solanum crops and wild relatives. The methods that we further elaborated and refined focus on • Improving flexibility of using different tissues as source materials, like fast-growing root tips and young leaves from seedlings or in vitro plantlets.• Obtaining nuclei suspensions through either lab homogenizers or by chopping.• Increasing flow sorting efficiency using DAPI (4′,6-diamidino-2-phenylindole) and PI (propidium iodide) DNA stains, with different lasers (UV or 488 nm) and sorting platforms such as the FACSAria and FACSVantage flow sorters, thus making it appropriate for more laboratories working on plant genomics.The obtained nuclei are embedded into agarose plugs for processing and isolating uncontaminated HMW DNA, which is a prerequisite for nanochannel-based next-generation optical mapping strategies.
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