J Integr Plant Biol. ›› 2007, Vol. 49 ›› Issue (11): 1580-1598.DOI: 10.1111/j.1774-7909.2007.00574.x

• Stress & Phytochemistry • Previous Articles     Next Articles

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 and Ming-Liang Xu   

Abstract: 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.

Key words: defense response gene, disease resistance, maize, molecular mapping.

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2022 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q