Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador

Puccinia striiformis f. sp. tritici (Pst) causing stripe rust is one of the most important pathogens on wheat worldwide. The fungus evolves into different virulent races to overcome resistance. In 2014-2017, 443 isolates were recovered from collections of China (141), Italy (133), Mexico (123), and...

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Main Authors: Wang, Meinan, Wan, Anmin, Li, Mingju, Maccaferri, Marco, Figueroa López, Pedro, Barnes, Charles W., Campaña Cruz, Diego Fabricio, Chen, Xianming
Format: Congreso
Language:en
Published: Boston, EE.UU: International Congress of Plant Pathology, 2018 2018
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Online Access:http://repositorio.iniap.gob.ec/handle/41000/5110
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spelling ir-:41000-51102018-08-31T17:22:37Z Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador Caracterización de la virulencia de colecciones de Puccinia striiformis f. sp. tritici de China, Italia, México y Ecuador Wang, Meinan Wan, Anmin Li, Mingju Maccaferri, Marco Figueroa López, Pedro Barnes, Charles W. Campaña Cruz, Diego Fabricio Chen, Xianming HONGOS PUCCINIA STRIIFORMIS ROYA AMARILLA CARACTERIZACIÓN CHINA ITALIA MÉXICO ECUADOR Puccinia striiformis f. sp. tritici (Pst) causing stripe rust is one of the most important pathogens on wheat worldwide. The fungus evolves into different virulent races to overcome resistance. In 2014-2017, 443 isolates were recovered from collections of China (141), Italy (133), Mexico (123), and Ecuador (46). These isolates were tested with 18 wheat Yr single-gene lines that are used to differentiate Pst races in the U.S. A total of 132 Pst races were detected, including 105 new races. The number of unique races in China, Mexico, Italy, and Ecuador were 54, 25, 24, and 18, respectively. None of the races were shared by more than two countries, but 4 races were shared by China and Italy, 3 by China and Mexico, and 4 by Ecuador and Mexico. The top three predominant races, PSTv-37 (40.7%), PSTv-52 (17.1%), and PSTv- 198 (9.8%), were similar to those identified in the US in 2016. Overall, virulences to Yr43, YrExp2, Yr6, Yr7, and Yr44 were most frequent (81.0-90.3%); those to YrTrl, Yr8, Yr76, Yr27, Yrl7, YrSP, and Yrl were moderate (17.8-59.6%); and those to YrlO, Yr24, and Yr32 were low (0.5-1.1%). None of the races were virulent on Yr5 or Yrl5. Significant variations in frequency were detected for virulences to Yrl (10.6% in Mexico to 85.8% in China); Yrl 7(11.3% in China to 71.4% in Italy); Yr27 (3.0% in Italy to 84.6% in Mexico); and Yr76 (6.5% in Ecuador to 83.0% in China). The information is useful for understanding epidemiology and controlling stripe rust. Puccirúa striiformis f.sp. tritici (Pst), que causa la roya amarilla, es uno de los patógenos más importantes en el trigo en todo el mundo. El hongo evoluciona en diferentes razas virulentas para vencer la resistencia. Entre el 2014-2017 se obtuvieron 443 aislamientos de colecciones de China (141), Italia (133), México (123) y Ecuador (46). Estos aislamientos se probaron en 18 líneas de trigo con un solo gen Yr que se usan para diferenciar las razas Pst en los EEUU. Se detectaron un total de 132 razas Pst, incluidas 105 razas nuevas. El número de razas únicas en China, México, Italia y Ecuador fue de 54, 25, 24 y 18, respectivamente. Ninguna de las razas fue compartida por más de dos países, pero China e Italia compartieron 4 razas, 3 entre China y México, y 4 entre Ecuador y México. Las tres principales razas predominantes, PSTv-37 (40.7%), PSTv-52 (17.1%) y PSTv-198 (9.8%), fueron similares a las identificadas en los EEUU. En el 2016. En general, la virulencia a Yr43, YrExp2, Yr6, Yr7 y Yr44 fueron más frecuentes (81.0-90.3%); los de YrTrl, Yr8, Yr76, Yr27, Yrl7, YrSPy Yrl fueron moderados (17.8- 59.6%); y aquellos a YrlO, Yr24 y Yr32 fueron bajos (0.5-1.1%). Ninguna de las razas fue virulenta en Yr5 o Yrl5. Se detectaron variaciones significativas en la frecuencia de virulencia a Yrl (10.6% en México a 85.8% en China); Yrl 7 (11.3% en China a 71.4% en Italia); Yr27 (3,0% en Italia a 84,6% en México); y Yr76 (6.5% en Ecuador a 83.0% en China). La información es útil para comprender la epidemiología y controlar la roya amarilla. 2018-08-27T16:06:52Z 2018-08-27T16:06:52Z 2018-07-29 Congreso Poster *EC-INIAP-BEESC-MGC. Quito (INIAP/poster pdf7) http://repositorio.iniap.gob.ec/handle/41000/5110 en Atribución-NoComercial-SinDerivadas 3.0 Ecuador http://creativecommons.org/licenses/by-nc-nd/3.0/ec/ 1 p. application/pdf E. E. Santa Catalina Boston, EE.UU: International Congress of Plant Pathology, 2018
institution INIAP
collection Repositorio INIAP
biblioteca Biblioteca INIAP
language en
format Congreso
topic HONGOS
PUCCINIA STRIIFORMIS
ROYA AMARILLA
CARACTERIZACIÓN
CHINA
ITALIA
MÉXICO
ECUADOR
spellingShingle HONGOS
PUCCINIA STRIIFORMIS
ROYA AMARILLA
CARACTERIZACIÓN
CHINA
ITALIA
MÉXICO
ECUADOR
Wang, Meinan
Wan, Anmin
Li, Mingju
Maccaferri, Marco
Figueroa López, Pedro
Barnes, Charles W.
Campaña Cruz, Diego Fabricio
Chen, Xianming
Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
description Puccinia striiformis f. sp. tritici (Pst) causing stripe rust is one of the most important pathogens on wheat worldwide. The fungus evolves into different virulent races to overcome resistance. In 2014-2017, 443 isolates were recovered from collections of China (141), Italy (133), Mexico (123), and Ecuador (46). These isolates were tested with 18 wheat Yr single-gene lines that are used to differentiate Pst races in the U.S. A total of 132 Pst races were detected, including 105 new races. The number of unique races in China, Mexico, Italy, and Ecuador were 54, 25, 24, and 18, respectively. None of the races were shared by more than two countries, but 4 races were shared by China and Italy, 3 by China and Mexico, and 4 by Ecuador and Mexico. The top three predominant races, PSTv-37 (40.7%), PSTv-52 (17.1%), and PSTv- 198 (9.8%), were similar to those identified in the US in 2016. Overall, virulences to Yr43, YrExp2, Yr6, Yr7, and Yr44 were most frequent (81.0-90.3%); those to YrTrl, Yr8, Yr76, Yr27, Yrl7, YrSP, and Yrl were moderate (17.8-59.6%); and those to YrlO, Yr24, and Yr32 were low (0.5-1.1%). None of the races were virulent on Yr5 or Yrl5. Significant variations in frequency were detected for virulences to Yrl (10.6% in Mexico to 85.8% in China); Yrl 7(11.3% in China to 71.4% in Italy); Yr27 (3.0% in Italy to 84.6% in Mexico); and Yr76 (6.5% in Ecuador to 83.0% in China). The information is useful for understanding epidemiology and controlling stripe rust.
author Wang, Meinan
Wan, Anmin
Li, Mingju
Maccaferri, Marco
Figueroa López, Pedro
Barnes, Charles W.
Campaña Cruz, Diego Fabricio
Chen, Xianming
author_facet Wang, Meinan
Wan, Anmin
Li, Mingju
Maccaferri, Marco
Figueroa López, Pedro
Barnes, Charles W.
Campaña Cruz, Diego Fabricio
Chen, Xianming
author_sort Wang, Meinan
title Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
title_short Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
title_full Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
title_fullStr Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
title_full_unstemmed Virulence characterization of Puccinia striiformis f. sp. Tritici collections from China, Italy, Mexico, and Ecuador
title_sort virulence characterization of puccinia striiformis f. sp. tritici collections from china, italy, mexico, and ecuador
publisher Boston, EE.UU: International Congress of Plant Pathology, 2018
publishDate 2018
url http://repositorio.iniap.gob.ec/handle/41000/5110
_version_ 1635512063669305344
score 11,871979