Mapping of defense response gene homologs and their association with resistance loci in maize

Gui Xiang Wang, Yu Chen, Jiu Ran Zhao, Lin Li, Schuyler S. Korban, Feng Ge Wang, Jian Sheng Li, Jin Rui Dai, Ming Liang Xu

Research output: Contribution to journalArticlepeer-review


Defense response genes in higher plant species are involved in a variety of signal transduction pathways and biochemical reactions to counterattack invading pathogens. In this study, a total of 366 non-redundant defense response gene homologs (DRHs), including 124 unigenes/expressed sequence tags, 226 tentative consensuses, and 16 DRH contigs have been identified by mining the Maize Genetics and Genomics and The Institute for Genomic Research maize databases using 35 essential defense response genes. Of 366 DRHs, 202 are mapped to 152 loci across ten maize chromosomes via both the genetic and in silico mapping approaches. The mapped DRHs seem to cluster together rather than be evenly distributed along the maize genome. Approximately half of these DHRs are located in regions harboring either major resistance genes or quantitative trait loci (QTL). Therefore, this comprehensive DRH linkage map will provide reference sequences to identify either positional candidate genes for resistance genes and/or QTLs or to develop makers for fine-mapping and marker-assisted selection of resistance genes and/or QTLs.

Original languageEnglish (US)
Pages (from-to)1580-1598
Number of pages19
JournalJournal of Integrative Plant Biology
Issue number11
StatePublished - Nov 2007


  • Defense response gene
  • Disease resistance
  • Maize
  • Molecular mapping

ASJC Scopus subject areas

  • Biochemistry
  • General Biochemistry, Genetics and Molecular Biology
  • Plant Science


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