Extraction of high-molecular-weight genomic DNA for long-read sequencing of single molecules.
Biotechniques
; 61(4): 203-205, 2016 10 01.
Article
em En
| MEDLINE
| ID: mdl-27712583
ABSTRACT
De novo sequencing of complex genomes is one of the main challenges for researchers seeking high-quality reference sequences. Many de novo assemblies are based on short reads, producing fragmented genome sequences. Third-generation sequencing, with read lengths >10 kb, will improve the assembly of complex genomes, but these techniques require high-molecular-weight genomic DNA (gDNA), and gDNA extraction protocols used for obtaining smaller fragments for short-read sequencing are not suitable for this purpose. Methods of preparing gDNA for bacterial artificial chromosome (BAC) libraries could be adapted, but these approaches are time-consuming, and commercial kits for these methods are expensive. Here, we present a protocol for rapid, inexpensive extraction of high-molecular-weight gDNA from bacteria, plants, and animals. Our technique was validated using sunflower leaf samples, producing a mean read length of 12.6 kb and a maximum read length of 80 kb.
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Base de dados:
MEDLINE
Assunto principal:
DNA
/
Genoma
/
Análise de Sequência de DNA
/
Sequenciamento de Nucleotídeos em Larga Escala
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article