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A simple and efficient method to isolate LTR sequences of plant retrotransposon
Da-Long Guo1, Xiao-Gai Hou2, Xi Zhang2
1College of Forestry, Henan University of Science and Technology, Luoyang, Henan 471003, China.
Biomed Research International
|June 3, 2014
Summary
Researchers developed a new, efficient method to isolate long terminal repeat (LTR) sequences from retrotransposons (RTNs). This technique simplifies the development of RTN-based molecular markers for plant genomics.
Area of Science:
- Plant genomics
- Molecular biology
- Evolutionary biology
Background:
- Retrotransposons (RTNs) significantly influence plant genome size, structure, and evolution.
- RTNs are valuable for developing molecular markers due to their abundance and polymorphism.
- Limited information on long terminal repeat (LTR) sequences hinders RTN-based marker application.
Purpose of the Study:
- To present a novel, simple, and efficient method for isolating RTN LTR sequences.
- To overcome the scarcity of LTR sequence information for RTN marker development.
- To validate the utility of isolated LTR sequences for molecular marker analysis.
Main Methods:
- A new method combining degenerate RNase H nested primers and polypurine tract (PPT) primers.
- Integration of high-efficiency thermal asymmetric interlaced PCR (hiTAIL-PCR), annealing control primer (ACP) system, and suppression PCR.
- Three rounds of PCR without restriction enzymes, adapters, or hybridizations.
Main Results:
- Successfully isolated nineteen LTR sequences from tree peony.
- Validated the applicability of LTR sequences for marker development using SSAP analysis.
- Demonstrated the method's simplicity, low cost, high efficiency, speed, and economy.
Conclusions:
- The developed method is a rapid, economical, and time-saving approach for isolating RTN LTR sequences.
- This technique facilitates the development and application of RTN-based molecular markers in plants.
- The method offers a significant advancement for plant genome research and marker-assisted selection.
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