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Related Experiment Videos

Large-scale EST sequencing in rice

K Yamamoto1, T Sasaki

  • 1Rice Genome Research Program (RGP), Society for Techo-innovation of Agriculture, Forestry and Fisheries (STAFF), Ibaraki, Japan.

Plant Molecular Biology
|September 18, 1997
PubMed
Summary

Large-scale cDNA analysis in rice has catalogued over 29,000 clones, identifying approximately 10,000 unique expressed genes. This research aids in understanding rice gene expression and regulation.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Plant Science

Background:

  • Large-scale cDNA analysis offers significant advantages for rice genome research.
  • cDNA clones have been instrumental in constructing RFLP and physical maps and studying gene expression.

Purpose of the Study:

  • To catalogue all expressed genes in rice, including tissue-specific, developmental, and stress-specific genes.
  • To analyze sequence data for gene expression and regulation insights.

Main Methods:

  • Isolation and partial sequencing of over 29,000 cDNA clones from various rice tissues and calluses.
  • Translation of sequence data into amino acid sequences and similarity searches against known proteins (PIR).
  • Analysis of nucleotide sequence similarities for classification into independent gene groups.

Main Results:

  • Approximately 25% of cDNA clones showed significant similarity to known proteins.
  • Library-specific distributions of some clones indicated tissue-specific gene expression.
  • Analysis classified 24,728 clones into around 10,000 independent groups, suggesting capture of a substantial portion of rice's expressed genes.

Conclusions:

  • Large-scale cDNA analysis provides valuable data for understanding gene expression and regulation in rice.
  • The study has identified a significant number of expressed genes, contributing to a comprehensive gene catalogue.
  • Findings support the potential for further genomic and transcriptomic studies in rice.

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