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008 20249s2024||||mx |||p|op||||00||0|eng|d
022 _a0031-949X
022 _a1943-7684 (Online)
024 8 _ahttps://doi.org/10.1094/PHYTO-01-24-0018-R
040 _aMX-TxCIM
041 _aeng
100 0 _aMotohiro Yoshioka
_937287
245 1 0 _aRmg10, a novel wheat blast resistance gene derived from Aegilops tauschii
260 _bAmerican Phytopathological Society,
_c2024.
_aSt. Paul, MN (United States of America) :
500 _aPeer review
520 _aWheat blast, caused by Pyricularia oryzae (syn. Magnaporthe oryzae) pathotype Triticum (MoT), is a devastating disease that can result in up to 100% yield loss in affected fields. To find new resistance genes against wheat blast, we screened 199 accessions of Aegilops tauschii, the D genome progenitor of common wheat (Triticum aestivum), by seedling inoculation assays with Brazilian MoT isolate Br48 and found 14 resistant accessions. A synthetic hexaploid wheat line (Ldn/KU-2097) derived from a cross between the T. turgidum ‘Langdon’ (Ldn) and resistant A. tauschii accession KU-2097 exhibited resistance in seedlings and spikes against Br48. In an F2 population derived from ‘Chinese Spring’ × Ldn/KU-2097, resistant and susceptible individuals segregated in a 3:1 ratio, suggesting that the resistance from KU-2097 is controlled by a single dominant gene. We designated this gene Rmg10. Genetic mapping using an F2:3 population from the same cross mapped the RMG10 locus to the short arm of chromosome 2D. Rmg10 was ineffective against Bangladesh isolates but effective against Brazilian isolates. Field tests in Bolivia showed increased spike resistance in a synthetic octaploid wheat line produced from a cross between common wheat cultivar ‘Gladius’ and KU-2097. These results suggest that Rmg10 would be beneficial in farmers’ fields in South America.
546 _aText in English
650 7 _aAegilops tauschii
_2AGROVOC
_930145
650 7 _aMagnaporthe
_2AGROVOC
_95942
650 7 _aPyricularia oryzae
_2AGROVOC
_919835
650 7 _aResistance genes
_2AGROVOC
_932099
650 7 _aWheat
_2AGROVOC
_91310
700 1 _aKishii, M.
_gGlobal Wheat Program
_8INT2678
_9849
700 1 _aPawan Kumar Singh
_gGlobal Wheat Program
_8INT2868
_9868
700 0 _aYoshihiro Inoue
_937288
700 0 _aTrinh Thi Phuong Vy
_937289
700 0 _aYukio Tosa
_917677
700 0 _aSoichiro Asuke
_930769
773 0 _tPhytopathology
_gv. 114, no. 9, p. 2113-2120
_dSt. Paul, MN (United States of America) : American Phytopathological Society, 2024
_x0031-949X
_w444676
942 _cJA
_n0
_2ddc
999 _c68017
_d68009