A comparative analysis of transcript abundance using SAGE and Affymetrix arrays

Adel F.M. Ibrahim, Peter E. Hedley, Linda Cardle, Warren Kruger, David F. Marshall, Gary J. Muehlbauer, Robbie Waugh (Lead / Corresponding author)

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A number of methods are currently used for gene expression profiling. They differ in scale, economy and sensitivity. We present the results of a direct comparison between serial analysis of gene expression (SAGE) and the Barley1 Affymetrix GeneChip. Both technology platforms were used to obtain quantitative measurements of transcript abundance using identical RNA samples and assessed for their ability to quantify differential gene expression. For SAGE, a total of 82,122 tags were generated from two independent libraries representing whole developing barley caryopsis and dissected embryos. The Barley1 GeneChip contains 22,791 probe sets. Results obtained from both methods are generally comparable, indicating that both will lead to similar conclusions regarding transcript levels and differential gene expression. However, excluding singletons, 24.4% of the unique SAGE tags had no corresponding probe set on the Barley1 array indicating that a broader snapshot of gene expression was obtained by SAGE. Discrepancies were observed for a number of "genes" and these are discussed.

Original languageEnglish
Pages (from-to)163-174
Number of pages12
JournalFunctional and Integrative Genomics
Volume5
Issue number3
DOIs
Publication statusPublished - 1 Jul 2005

Keywords

  • Barley
  • Microarray
  • SAGE
  • Transcriptome

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