000			03246nab|a22004217a|4500
001			65608
003			MX-TxCIM
005			20221003200758.0
008			20228s2022||||mx |||p|op||||00||0|eng|d
022			_a0191-2917
022			_a1943-7692 (Online)
024	8		_ahttps://doi.org/10.1094/PDIS-03-22-0626-RE
040			_aMX-TxCIM
041			_aeng
100	1		_aMuñoz-Zavala, C. _928829
245	1	0	_aOccurrence and Distribution of Physiological Races of Exserohilum turcicum in Maize Growing Regions of Mexico
260			_bAmerican Phytopathological Society (APS), _c2022. _aSt. Paul, MN (USA) :
500			_aPeer review
500			_aFirst Look
520			_aTurcicum leaf blight (TLB), is a common foliar disease of maize in Mexico that is caused by the fungal pathogen Exserohilum turcicum. The most effective management strategy against TLB is monogenic race-specific resistance. Among the 140 E. turcicum isolates from symptomatic leaves collected from maize fields in Mexico, 100 were obtained from tropical (Veracruz) and temperate areas (Estado de México) between 2010 and 2019, and 40 isolates were obtained from tropical (Sinaloa, Tamaulipas, Veracruz, and Chiapas), subtropical (Nayarit, Jalisco and Guanajuato) and temperate areas (Estado de Mexico, Hidalgo, and Puebla) collected in 2019. All the isolates caused TLB symptoms on the positive control (ht4) showing that they were all pathogenic. Six physiological races of E. turcicum (2, 3, 23, 3N, 23N, and 123N) were identified based on resistant or susceptible responses displayed by five maize differential genotypes (A619Ht1, A619Ht2, A619Ht3, B68HtN, and A619ht4). The most common was race 23 accounting for 68% of the isolates, followed by races 23N, 123N, 3, 2, and 3N at 15%, 8%, 6%, 2%, and 1%, respectively. Race 123N was able to infect the greatest number of maize differential genotypes used in the study. Race 123N was detected in Sinaloa and Estado de México. Race 3 was detected in Nayarit and Jalisco. Race 2 was detected in Jalisco, Estado de México and Veracruz, and race 3N was detected in Tamaulipas. Race 23 was equally dominant in the tropical, subtropical, and temperate regions, while race 123N was more common in the tropical environment and race 23N was more common in the tropical and temperate environments. There was no evidence for shifts in the races between 2010 and 2019.
546			_aText in English
591			_aLoladze, A. : No CIMMYT Affiliation
591			_aAlakonya, A. : No CIMMYT Affiliation
650		7	_aSetosphaeria turcica _2AGROVOC _92254
650		7	_aMaize _2AGROVOC _91173
650		7	_aFoliar diseases _2AGROVOC _95940
650		7	_aPhysiological races _2AGROVOC _99779
651		7	_2AGROVOC _91318 _aMexico
700	1		_aLoladze, A. _9896 _8INT3176 _gFormerly Global Wheat Program
700	1		_aVargas-Hernández, M. _92281
700	1		_aGarcía‑León, E. _928830
700	1		_aAlakonya, A. _911060 _8001711980 _gGenetic Resources Program
700	1		_aTovar-Pedraza, J.M. _928831
700	1		_aGoodwin, P. _928832
700	1		_aLeyva Mir, S.G. _910252
773	0		_tPlant disease _gIn press _dSt. Paul, MN (USA) : American Phytopathological Society (APS), 2022. _w444690 _x0191-2917
942			_cJA _n0 _2ddc
999			_c65608 _d65600