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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
21/10/2014 |
Actualizado : |
28/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
STEWART, S.; ABEYSEKARA, N.; ROBERTSON, A.E. |
Afiliación : |
SILVINA MARIA STEWART SONEIRA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
Título : |
Pathotype and genetic shifts in a population of Phytophthora sojae under soybean cultivar rotation. |
Fecha de publicación : |
2014 |
Fuente / Imprenta : |
Plant Disease, 2014, v.98, no.5, p. 614-624. |
DOI : |
10.1094/PDIS-05-13-0575-RE |
Idioma : |
Inglés |
Notas : |
In: OOMYCETE MOLECULAR GENETIC NETWORK MEETING, 14., 2013 Pacific Grove, CA, US. Poster presentations. [s.l.]: OMGN, 2013 |
Contenido : |
ABSTRACT.
Changes in pathotype structure of Phytophthora sojae populations have been attributed to deployment of race-specific resistant Rps genes in soybean that have been incorporated into commercial cultivars to reduce losses due to Phytophthora root and stem rot. To test this hypothesis, a cultivar rotation study was established from 2007 through 2010 in microplots at a site in Iowa with no history of soybean cultivation. All microplots were inoculated with P. sojae isolate PR1, race 1 (vir 7) prior to planting in year 1. Six rotations were tested: (i) continuous planting of a P. sojae-susceptible cultivar, (ii) continuous planting of a cultivar with high partial resistance to the pathogen, (iii) continuous planting of a cultivar with the Rps 1k gene, (iv) annual rotation of a susceptible with a resistant cultivar, (v) annual rotation of a partially resistant cultivar with a cultivar with the Rps 1k gene, and (vi) 4-year rotation of cultivars with Rps 1k, 1c, 3a, and 1k genes in year one, two, three, and four, respectively. The diversity of 121 isolates of P. sojae that were recovered by baiting from soil samples collected from the experiment were assessed using pathotyping and eight microsatellite markers, and compared with PR1. Changes in pathotype and multilocus genotypes (MLGs) were recorded at the second sampling date, indicating that P. sojae has the ability to evolve quickly. In total, 14 pathotypes and 21 MLGs were recovered over the 4-year experiment, and only 49 and 22% of the isolates had the same pathotype and MLG, respectively, as PR1. The number of isolates of P. sojae recovered varied among rotations, with more isolates recovered from rotations that included a cultivar with partial resistance. Gain of virulence was detected on Rps 1a, 1b, 1c, 1d, and 3a and was not dependent on rotation. Using simple-sequence repeat analysis, 10 alleles that were different from those of PR1 were detected throughout the 4-year period. Cultivar rotation affected the genetic structure of the P. sojae population. Recovery of isolates with different MLGs, genotypic diversity (G = 4.7), and gene diversity (UHe = 0.45) were greater under continuous rotation with partial resistance. Phytophthora root and stem rot causes economic losses in the north-central region of the United States annually. An improved understanding of the effect of Rps gene deployment on P. sojae diversity would lead to improved management practices and reduced losses.
© 2014 The American Phytopathological Society. MenosABSTRACT.
Changes in pathotype structure of Phytophthora sojae populations have been attributed to deployment of race-specific resistant Rps genes in soybean that have been incorporated into commercial cultivars to reduce losses due to Phytophthora root and stem rot. To test this hypothesis, a cultivar rotation study was established from 2007 through 2010 in microplots at a site in Iowa with no history of soybean cultivation. All microplots were inoculated with P. sojae isolate PR1, race 1 (vir 7) prior to planting in year 1. Six rotations were tested: (i) continuous planting of a P. sojae-susceptible cultivar, (ii) continuous planting of a cultivar with high partial resistance to the pathogen, (iii) continuous planting of a cultivar with the Rps 1k gene, (iv) annual rotation of a susceptible with a resistant cultivar, (v) annual rotation of a partially resistant cultivar with a cultivar with the Rps 1k gene, and (vi) 4-year rotation of cultivars with Rps 1k, 1c, 3a, and 1k genes in year one, two, three, and four, respectively. The diversity of 121 isolates of P. sojae that were recovered by baiting from soil samples collected from the experiment were assessed using pathotyping and eight microsatellite markers, and compared with PR1. Changes in pathotype and multilocus genotypes (MLGs) were recorded at the second sampling date, indicating that P. sojae has the ability to evolve quickly. In total, 14 pathotypes and 21 MLGs were recovered over the 4-year experiment, and only... Presentar Todo |
Palabras claves : |
CULTIVAR ROTATION; GENETIC SHIFTS; PHYTOPHTORA SOJAE. |
Thesagro : |
FITOPATOLOGÍA; PHYTOPHTHORA; SOJA. |
Asunto categoría : |
H20 Enfermedades de las plantas |
URL : |
https://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS-05-13-0575-RE
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Marc : |
LEADER 03346naa a2200241 a 4500 001 1051215 005 2019-10-28 008 2014 bl uuuu u00u1 u #d 024 7 $a10.1094/PDIS-05-13-0575-RE$2DOI 100 1 $aSTEWART, S. 245 $aPathotype and genetic shifts in a population of Phytophthora sojae under soybean cultivar rotation.$h[electronic resource] 260 $c2014 500 $aIn: OOMYCETE MOLECULAR GENETIC NETWORK MEETING, 14., 2013 Pacific Grove, CA, US. Poster presentations. [s.l.]: OMGN, 2013 520 $aABSTRACT. Changes in pathotype structure of Phytophthora sojae populations have been attributed to deployment of race-specific resistant Rps genes in soybean that have been incorporated into commercial cultivars to reduce losses due to Phytophthora root and stem rot. To test this hypothesis, a cultivar rotation study was established from 2007 through 2010 in microplots at a site in Iowa with no history of soybean cultivation. All microplots were inoculated with P. sojae isolate PR1, race 1 (vir 7) prior to planting in year 1. Six rotations were tested: (i) continuous planting of a P. sojae-susceptible cultivar, (ii) continuous planting of a cultivar with high partial resistance to the pathogen, (iii) continuous planting of a cultivar with the Rps 1k gene, (iv) annual rotation of a susceptible with a resistant cultivar, (v) annual rotation of a partially resistant cultivar with a cultivar with the Rps 1k gene, and (vi) 4-year rotation of cultivars with Rps 1k, 1c, 3a, and 1k genes in year one, two, three, and four, respectively. The diversity of 121 isolates of P. sojae that were recovered by baiting from soil samples collected from the experiment were assessed using pathotyping and eight microsatellite markers, and compared with PR1. Changes in pathotype and multilocus genotypes (MLGs) were recorded at the second sampling date, indicating that P. sojae has the ability to evolve quickly. In total, 14 pathotypes and 21 MLGs were recovered over the 4-year experiment, and only 49 and 22% of the isolates had the same pathotype and MLG, respectively, as PR1. The number of isolates of P. sojae recovered varied among rotations, with more isolates recovered from rotations that included a cultivar with partial resistance. Gain of virulence was detected on Rps 1a, 1b, 1c, 1d, and 3a and was not dependent on rotation. Using simple-sequence repeat analysis, 10 alleles that were different from those of PR1 were detected throughout the 4-year period. Cultivar rotation affected the genetic structure of the P. sojae population. Recovery of isolates with different MLGs, genotypic diversity (G = 4.7), and gene diversity (UHe = 0.45) were greater under continuous rotation with partial resistance. Phytophthora root and stem rot causes economic losses in the north-central region of the United States annually. An improved understanding of the effect of Rps gene deployment on P. sojae diversity would lead to improved management practices and reduced losses. © 2014 The American Phytopathological Society. 650 $aFITOPATOLOGÍA 650 $aPHYTOPHTHORA 650 $aSOJA 653 $aCULTIVAR ROTATION 653 $aGENETIC SHIFTS 653 $aPHYTOPHTORA SOJAE 700 1 $aABEYSEKARA, N. 700 1 $aROBERTSON, A.E. 773 $tPlant Disease, 2014$gv.98, no.5, p. 614-624.
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Registro original : |
INIA Las Brujas (LB) |
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Biblioteca (s) : |
INIA Tacuarembó. |
Fecha actual : |
21/03/2018 |
Actualizado : |
12/09/2019 |
Tipo de producción científica : |
Capítulo en Libro Técnico-Científico |
Autor : |
PEREIRA MACHÍN, M.; LARRATEA, F. |
Afiliación : |
MARCELO PEREIRA MACHÍN; FERNANDA LARRATEA LOPEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Campo natural, información satelital, uso de la regla. |
Fecha de publicación : |
2018 |
Fuente / Imprenta : |
ln: GÓMEZ MILLER, R.; PORCILE, V. (Ed.). Mejora de la sostenibilidad de la ganadería familiar en Uruguay. Montevideo (Uruguay): INIA, 2018. |
Páginas : |
p. 49-55 |
Serie : |
(INIA Serie Técnica; 240) |
ISBN : |
978-9974-38-302-0 |
ISSN : |
1688-9266 |
DOI : |
http://doi.org/10.35676/INIA/ST.240 |
Idioma : |
Español |
Contenido : |
El campo natural es el recurso forrajero más importante que tiene el Uruguay, principal fuente de alimento de los rodeos y majadas de cría, y uno de los determinantes principales de la competitividad internacional de la cadena cárnica y lanera de nuestro país. Poder conocer el potencial productivo del recurso, su dinámica y variación es muy importante cuando se toman decisiones. Con ese objetivo se utilizó la herramienta del seguimiento forrajero vía teledetección. |
Thesagro : |
CAMPO NATURAL. |
Asunto categoría : |
E50 Sociología rural y seguridad social |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/8954/1/st240-2018p49-55.pdf
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Marc : |
LEADER 01148naa a2200205 a 4500 001 1058279 005 2019-09-12 008 2018 bl uuuu u00u1 u #d 020 $a978-9974-38-302-0 022 $a1688-9266 024 7 $ahttp://doi.org/10.35676/INIA/ST.240$2DOI 100 1 $aPEREIRA MACHÍN, M. 245 $aCampo natural, información satelital, uso de la regla. 260 $c2018 300 $ap. 49-55 490 $a(INIA Serie Técnica; 240) 520 $aEl campo natural es el recurso forrajero más importante que tiene el Uruguay, principal fuente de alimento de los rodeos y majadas de cría, y uno de los determinantes principales de la competitividad internacional de la cadena cárnica y lanera de nuestro país. Poder conocer el potencial productivo del recurso, su dinámica y variación es muy importante cuando se toman decisiones. Con ese objetivo se utilizó la herramienta del seguimiento forrajero vía teledetección. 650 $aCAMPO NATURAL 700 1 $aLARRATEA, F. 773 $tln: GÓMEZ MILLER, R.; PORCILE, V. (Ed.). Mejora de la sostenibilidad de la ganadería familiar en Uruguay. Montevideo (Uruguay): INIA, 2018.
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