Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola

Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different facto...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Susana Boso [verfasserIn] Pilar Gago [verfasserIn] José-Luis Santiago [verfasserIn] María de la Fuente [verfasserIn] María-Carmen Martínez [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	genotypic diversity geographical barriers grapevine Plasmopara viticola virulence

Übergeordnetes Werk:	In: The Plant Pathology Journal - Hanrimwon Publishing Company, 2016, 35(2019), 2, Seite 125-136
Übergeordnetes Werk:	volume:35 ; year:2019 ; number:2 ; pages:125-136

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.5423/PPJ.OA.09.2018.0194

Katalog-ID:	DOAJ040022056

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520			\|a Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity.
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allfields	10.5423/PPJ.OA.09.2018.0194 doi (DE-627)DOAJ040022056 (DE-599)DOAJ98d66f2931d14d11934ef0d612233e94 DE-627 ger DE-627 rakwb eng SB1-1110 Susana Boso verfasserin aut Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity. genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture Pilar Gago verfasserin aut José-Luis Santiago verfasserin aut María de la Fuente verfasserin aut María-Carmen Martínez verfasserin aut In The Plant Pathology Journal Hanrimwon Publishing Company, 2016 35(2019), 2, Seite 125-136 (DE-627)615129951 (DE-600)2529195-6 20939280 nnns volume:35 year:2019 number:2 pages:125-136 https://doi.org/10.5423/PPJ.OA.09.2018.0194 kostenfrei https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 kostenfrei http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 kostenfrei https://doaj.org/toc/1598-2254 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 35 2019 2 125-136
spelling	10.5423/PPJ.OA.09.2018.0194 doi (DE-627)DOAJ040022056 (DE-599)DOAJ98d66f2931d14d11934ef0d612233e94 DE-627 ger DE-627 rakwb eng SB1-1110 Susana Boso verfasserin aut Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity. genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture Pilar Gago verfasserin aut José-Luis Santiago verfasserin aut María de la Fuente verfasserin aut María-Carmen Martínez verfasserin aut In The Plant Pathology Journal Hanrimwon Publishing Company, 2016 35(2019), 2, Seite 125-136 (DE-627)615129951 (DE-600)2529195-6 20939280 nnns volume:35 year:2019 number:2 pages:125-136 https://doi.org/10.5423/PPJ.OA.09.2018.0194 kostenfrei https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 kostenfrei http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 kostenfrei https://doaj.org/toc/1598-2254 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 35 2019 2 125-136
allfields_unstemmed	10.5423/PPJ.OA.09.2018.0194 doi (DE-627)DOAJ040022056 (DE-599)DOAJ98d66f2931d14d11934ef0d612233e94 DE-627 ger DE-627 rakwb eng SB1-1110 Susana Boso verfasserin aut Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity. genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture Pilar Gago verfasserin aut José-Luis Santiago verfasserin aut María de la Fuente verfasserin aut María-Carmen Martínez verfasserin aut In The Plant Pathology Journal Hanrimwon Publishing Company, 2016 35(2019), 2, Seite 125-136 (DE-627)615129951 (DE-600)2529195-6 20939280 nnns volume:35 year:2019 number:2 pages:125-136 https://doi.org/10.5423/PPJ.OA.09.2018.0194 kostenfrei https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 kostenfrei http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 kostenfrei https://doaj.org/toc/1598-2254 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 35 2019 2 125-136
allfieldsGer	10.5423/PPJ.OA.09.2018.0194 doi (DE-627)DOAJ040022056 (DE-599)DOAJ98d66f2931d14d11934ef0d612233e94 DE-627 ger DE-627 rakwb eng SB1-1110 Susana Boso verfasserin aut Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity. genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture Pilar Gago verfasserin aut José-Luis Santiago verfasserin aut María de la Fuente verfasserin aut María-Carmen Martínez verfasserin aut In The Plant Pathology Journal Hanrimwon Publishing Company, 2016 35(2019), 2, Seite 125-136 (DE-627)615129951 (DE-600)2529195-6 20939280 nnns volume:35 year:2019 number:2 pages:125-136 https://doi.org/10.5423/PPJ.OA.09.2018.0194 kostenfrei https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 kostenfrei http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 kostenfrei https://doaj.org/toc/1598-2254 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 35 2019 2 125-136
allfieldsSound	10.5423/PPJ.OA.09.2018.0194 doi (DE-627)DOAJ040022056 (DE-599)DOAJ98d66f2931d14d11934ef0d612233e94 DE-627 ger DE-627 rakwb eng SB1-1110 Susana Boso verfasserin aut Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity. genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture Pilar Gago verfasserin aut José-Luis Santiago verfasserin aut María de la Fuente verfasserin aut María-Carmen Martínez verfasserin aut In The Plant Pathology Journal Hanrimwon Publishing Company, 2016 35(2019), 2, Seite 125-136 (DE-627)615129951 (DE-600)2529195-6 20939280 nnns volume:35 year:2019 number:2 pages:125-136 https://doi.org/10.5423/PPJ.OA.09.2018.0194 kostenfrei https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 kostenfrei http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 kostenfrei https://doaj.org/toc/1598-2254 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 35 2019 2 125-136
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source	In The Plant Pathology Journal 35(2019), 2, Seite 125-136 volume:35 year:2019 number:2 pages:125-136
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topic_facet	genotypic diversity geographical barriers grapevine Plasmopara viticola virulence Plant culture
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authorswithroles_txt_mv	Susana Boso @@aut@@ Pilar Gago @@aut@@ José-Luis Santiago @@aut@@ María de la Fuente @@aut@@ María-Carmen Martínez @@aut@@
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callnumber-first	S - Agriculture
author	Susana Boso
spellingShingle	Susana Boso misc SB1-1110 misc genotypic diversity misc geographical barriers misc grapevine misc Plasmopara viticola misc virulence misc Plant culture Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola
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topic_title	SB1-1110 Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola genotypic diversity geographical barriers grapevine Plasmopara viticola virulence
topic	misc SB1-1110 misc genotypic diversity misc geographical barriers misc grapevine misc Plasmopara viticola misc virulence misc Plant culture
topic_unstemmed	misc SB1-1110 misc genotypic diversity misc geographical barriers misc grapevine misc Plasmopara viticola misc virulence misc Plant culture
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title	Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola
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title_full	Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola
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title_sort	factors affecting the vineyard populational diversity of plasmopara viticola
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title_auth	Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola
abstract	Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity.
abstractGer	Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity.
abstract_unstemmed	Vitis vinifera is very susceptible to downy mildew (Plasmopara viticola). A number of authors have suggested different genetic populations of this fungus exist in Europe, each showing a different degree of virulence. Work performed to date indicates this diversity to be the result of different factors. In areas where gene flow is greater and recombination more frequent, the diversity of P. viticola appears to be wider. In vineyards isolated by geographic barriers, a race may become dominant and produce clonal epidemics driven by asexual reproduction. The aim of the present work was to identify the conditions that influence the genetic diversity of P. viticola populations in the vineyards of northwestern Spain, where the climatic conditions for the growth of this fungus are very good. Vineyards situated in a closed, narrow valley of the interior, in more open valleys, and on the coast were sampled and the populations of P. viticola detected were differentiated at the molecular level through the examination of microsatellite markers. The populations of P. viticola represented in primary and secondary infections were investigated in the same way. The concentration of airborne sporangia in the vegetative cycle was also examined, as was the virulence of the different P. viticola populations detected. The epidemiological characteristics of the fungus differed depending on the degree of isolation of the vineyard, the airborne spore concentration, and on whether the attack was primary or secondary. Strong isolation was associated with the appearance of dominant fungal races and, therefore, reduced populational diversity.
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title_short	Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola
url	https://doi.org/10.5423/PPJ.OA.09.2018.0194 https://doaj.org/article/98d66f2931d14d11934ef0d612233e94 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464202 https://doaj.org/toc/1598-2254
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Factors Affecting the Vineyard Populational Diversity of Plasmopara viticola

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