RRC ID 33292
Author Tagle AG, Chuma I, Tosa Y.
Title Rmg7, a New Gene for Resistance to Triticum Isolates of Pyricularia oryzae Identified in Tetraploid Wheat.
Journal Phytopathology
Abstract A single gene for resistance, designated Rmg7 (Resistance to Magnaporthe grisea 7), was identified in a tetraploid wheat accession, St24 (Triticum dicoccum, KU120), against Br48, a Triticum isolate of Pyricularia oryzae. Two other wheat accessions, St17 (T. dicoccum, KU112) and St25 (T. dicoccum, KU122), were also resistant against Br48 and showed a similar disease reaction pattern to St24. Crosses between these resistant accessions yielded no susceptible F2 seedlings, suggesting that St24, St17, and St25 carry the same resistance gene. Furthermore, a single avirulence gene corresponding to Rmg7 was detected in a segregation analysis of random F1 progenies between Br48 and MZ5-1-6, an Eleusine isolate virulent to St24 at a higher temperature. This avirulence gene was recognized not only by St24, but also by St17 and St25, thus supporting the preceding results indicating that all three accessions carry Rmg7. This resistance gene may have potential in future wheat breeding programs.
Volume 105(4)
Pages 495-9
Published 2015-4-1
DOI 10.1094/PHYTO-06-14-0182-R
PMID 25870924
MeSH Ascomycota / physiology* Breeding Chromosome Mapping Crosses, Genetic Inflorescence / genetics Inflorescence / immunology Inflorescence / microbiology Plant Diseases / immunology* Plant Diseases / microbiology Plant Proteins / genetics* Seedlings / genetics Seedlings / immunology Seedlings / microbiology Tetraploidy Triticum / genetics* Triticum / immunology Triticum / microbiology
IF 3.234
Times Cited 21
Wheat KU-112 KU-120 KU-122 KU-137 KU-156 KU-185 KU-329