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Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
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A simple plant high-molecular-weight DNA extraction method suitable for single-molecule technologies.

Zhigang Li1, Stephen Parris1, Christopher A Saski1

  • 1Department of Plant and Environmental Sciences, College of Agriculture, Forestry and Life Sciences, Clemson University, Clemson, SC 29634 USA.

Plant Methods
|March 20, 2020
PubMed
Summary

A new method rapidly isolates high-quality, high-molecular-weight genomic DNA from diverse plant tissues. This technique streamlines DNA extraction for advanced sequencing technologies, reducing time and cost.

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Area of Science:

  • Molecular Biology
  • Plant Sciences
  • Genomics

Background:

  • High-molecular-weight (HMW) and pure DNA are essential for 3rd generation DNA Analyzers and optical mapping.
  • Conventional methods for HMW DNA isolation from plants involve protoplast preparation or agarose embedding, which are time-consuming and complex.

Purpose of the Study:

  • To develop a rapid, efficient, and cost-effective method for isolating HMW genomic DNA from various plant species.
  • To provide DNA suitable for single-molecule sequencing applications.

Main Methods:

  • Plant tissues are physically ground, and nuclei are isolated using a Nuclear Isolation Buffer (NIB).
  • Plastid DNA is removed via osmotic buffer washes and centrifugation.
  • Purified nuclei are lysed, cleaned by organic extraction, and genomic DNA precipitated using CTAB.

Main Results:

  • The method yields highly pure, HMW genomic DNA.
  • This procedure avoids agarose embedding, significantly reducing processing time (4-8 hours vs. days).
  • Successful DNA extraction was demonstrated in Upland cotton, blackgrass, and strawberry.

Conclusions:

  • This novel method offers a faster, simpler, and more economical approach to HMW DNA isolation.
  • The technique is versatile and applicable to a wide range of plant species and tissue types.
  • The extracted DNA is suitable for downstream applications like single-molecule sequencing.