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Optimized Protocol for DNA Extraction in Three Theobroma Species.

Angie F Riascos-España1, Brayan Toro A Cuastumal2, María Castro I Zambrano3

  • 1Faculty of Exact and Natural Sciences/Biology Program, BIOGEN research group, University of Nariño, Pasto, Colombia.

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|May 14, 2025
PubMed
Summary
This summary is machine-generated.

This study optimizes DNA extraction using a high-concentration CTAB method for challenging plant samples. The improved protocol yields high-quality DNA from aged leaves, enhancing throughput for genetic research.

Keywords:
DNA isolationGenomic applicationsGenotypingPlant biotechnologySequencingTheobroma

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Area of Science:

  • Molecular Biology
  • Genetics
  • Genomics

Background:

  • DNA extraction is vital for genetic and genomic studies.
  • Obtaining high-quality DNA from underexplored species or aged plant tissues presents challenges.
  • Optimized DNA extraction methods are needed to improve efficiency and yield.

Purpose of the Study:

  • To optimize the cetyltrimethylammonium bromide (CTAB)-based DNA extraction method for improved efficiency and yield.
  • To enable high-quality DNA extraction from aged leaves of *Theobroma* species.
  • To enhance the throughput of DNA extraction for large-scale genomic investigations.

Main Methods:

  • An optimized CTAB-based protocol using 4% CTAB and overnight incubation.
  • Inclusion of chloroform:isoamyl alcohol washes for purification.
  • Precipitation with isopropanol and washing with 70% ethanol.
  • Resuspension of purified DNA in ultrapure water.

Main Results:

  • The optimized protocol yields high-quality DNA suitable for PCR and sequencing.
  • Reliable DNA yields were obtained from older leaves of *T. cacao, T. bicolor*, and *T. grandiflorum*.
  • The protocol significantly enhances throughput, allowing parallel processing of more samples.

Conclusions:

  • The optimized CTAB method effectively extracts high-quality DNA from challenging plant material.
  • This high-throughput protocol supports large-scale genomic studies in *Theobroma* species.
  • The method provides a reliable solution for DNA extraction from aged plant tissues.