Related Experiment Video
Updated: Jun 24, 2026
09:40
Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
Genomic subtraction recovers rye-specific DNA elements enriched in the rye genome
Motonori Tomita1, Keiichi Akai, Takayoshi Morimoto
1Tottori University, Koyama-cho, Japan. tomita@muses.tottori-u.ac.jp
Molecular Biotechnology
|March 17, 2009
Summary
Researchers isolated four new rye genome-specific repetitive DNA elements using genomic subtraction, including known tandem and dispersed families. These findings offer insights into rye
Area of Science:
- Plant genomics
- Molecular biology
- DNA sequencing
Background:
- Repetitive DNA sequences are abundant in eukaryotic genomes.
- Methylation patterns influence DNA structure and function in plants.
- Rye (Secale cereale) possesses complex repetitive DNA elements.
Purpose of the Study:
- To isolate rye genome-specific repetitive DNA elements.
- To identify elements irrespective of their methylation status.
- To characterize novel repetitive sequences in the rye genome.
Main Methods:
- Genomic subtraction using rye-chromosome-addition-wheat lines.
- Enzymatic digestion with methylation-insensitive restriction enzymes (MboI, EcoO109I).
- Annealing of DNA fragments and Southern blot hybridization.
Main Results:
- Successfully isolated four classes of rye-specific repetitive elements.
- Identified two known families (tandem 350-family, dispersed R173 family) and two novel sequences (444 bp, 89 bp).
- Demonstrated that known families are located in methylated regions, with specific repeat unit organization.
Conclusions:
- Developed a method to isolate repetitive elements regardless of methylation.
- Characterized novel rye repetitive DNA sequences.
- Identified EcoO109I recognition sites as potentially useful for studying rye genome organization.
