Related Experiment Video
Updated: Jul 26, 2026
09:39
DNA Fingerprinting of Mycobacterium leprae Strains Using Variable Number Tandem Repeat (VNTR) - Fragment Length Analysis (FLA)
Published on: July 15, 2011
Isolation, characterization, and analysis of Leymus-specific DNA sequences
Sigridur Klara Bödvarsdóttir1, Kesara Anamthawat-Jónsson
1Institute of Biology, University of Iceland, Iceland.
Genome
|August 5, 2003
Summary
Leymus and Psathyrostachys share the same basic genome (Ns), indicating they should be combined into a single genus. This finding is supported by genomic DNA hybridization and repetitive DNA clone analysis.
Area of Science:
- Plant genomics
- Molecular evolution
- Cytogenetics
Background:
- Leymus and Psathyrostachys are distinct genera of grasses.
- Understanding their genomic relationship is crucial for plant taxonomy and breeding.
Purpose of the Study:
- To investigate the genomic content and evolutionary relatedness of Leymus and Psathyrostachys.
- To determine if these two genera share a common basic genome.
Main Methods:
- Genomic Southern hybridization with labeled DNA probes.
- Use of blocking DNA to assess genomic similarity.
- Cloning and characterization of repetitive DNA sequences.
- Fluorescence in situ hybridization (FISH) for chromosomal localization.
- DNA sequence analysis of cloned fragments.
Main Results:
- Genomic DNA hybridization confirmed identical genomic content between Leymus and Psathyrostachys.
- Characterized repetitive DNA clones (pLmIs1, pLmIs44, pLmIs51, pLmIs53, pLaIs56) hybridized to both genera.
- FISH revealed dispersed repetitive sequences painting chromosomes uniformly, excluding specific regions.
- Sequence analysis identified clones as retroelements, with pLmIs44 useful for genetic relatedness studies.
Conclusions:
- Leymus and Psathyrostachys share the same basic genome, designated as Ns.
- The findings provide strong evidence for combining these two genera into one.
- This research clarifies the taxonomic relationship and genomic composition of these grass species.
