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EST derived SSR markers for comparative mapping in wheat and rice
J-K Yu1, M La Rota, R V Kantety
1Department of Plant Breeding, Cornell University, 252 Emerson Hall, NY 14853, Ithaca, USA.
Molecular Genetics and Genomics : MGG
|June 16, 2004
Summary
Researchers compared wheat and rice genomes using expressed sequence tag simple sequence repeat (EST-SSR) markers. These markers enhance comparative mapping, aiding in transferring genetic information between these vital crop species.
Area of Science:
- Genomics
- Comparative Genomics
Background:
- Hexaploid wheat (Triticum aestivum L.) and rice (Oryza sativa L.) are crucial global crops.
- Understanding structural and functional genomic relationships aids in crop improvement.
Purpose of the Study:
- To evaluate structural and functional relationships between wheat and rice genomes.
- To enhance comparative mapping using expressed sequence tag simple sequence repeat (EST-SSR) markers.
Main Methods:
- Developed EST-SSR markers using species-specific and multi-species primer design strategies.
- Enhanced existing genetic linkage maps for wheat and rice using 58 EST-SSR markers.
- Analyzed PCR-based anchor loci to assess genome conservation and collinearity.
Main Results:
- Species-specific primer design yielded more consistent amplification.
- 44% of wheat-specific primers successfully amplified DNA in both species.
- Identified conserved loci supporting genome similarity but noted high interrupted collinearity.
Conclusions:
- Enhanced comparative maps of wheat and rice are valuable tools for information transfer.
- EST-SSR markers are effective for constructing comparative framework maps across species.
- These markers facilitate understanding and leveraging genetic information between wheat and rice.