Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China

Detalhes bibliográficos
Autor(a) principal: Bernardes-de-Assis, Joana
Data de Publicação: 2009
Outros Autores: Storari, Michelangelo, Zala, Marcello, Wang, Wenxiang, Jiang, Daohong, Li ShiDong, Jin, Meisong, McDonald, Bruce A., Ceresini, Paulo C. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1094/PHYTO-99-9-1090
http://hdl.handle.net/11449/10275
Resumo: Sheath blight disease (SBD) on rice, caused by Rhizoctonia solani AG-1 IA, is one of the most devastating rice diseases on a global basis, including China (in Eastern Asia), the world's largest rice-growing country. We analyzed the population genetics of nine rice-infecting populations from China using nine microsatellite loci. One allopatric population from India (Southern Asia) was included in the analyses. In total, 300 different multilocus genotypes were found among 572 fungal isolates. Clonal fractions within rice fields were 16 to 95%, suggesting that sclerotia were a major source of primary inoculum in some fields. Global Phi(ST) statistics (Phi(ST) = 42.49; P <= 0.001) were consistent with a relatively high level of differentiation among populations overall; however, pairwise comparisons gave nonsignificant R(ST) values, consistent with contemporary gene flow among five of the populations. Four of these populations were located along the Yangtze River tributary network. Gene flow followed an isolation-by-distance model consistent with restricted long-distance migration. Historical migration rates were reconstructed and yielded values that explained the current levels of population subdivision. Except for one population which appeared to be strictly clonal, all populations showed evidence of a mixed reproductive mode, including both asexual and sexual reproduction. One population had a strictly recombining structure (all loci were in Hardy-Weinberg equilibrium) but the remaining populations from China and the one from India exhibited varying degrees of sexual reproduction. Six populations showed significant F(IS) values consistent with inbreeding.
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spelling Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from ChinaSheath blight disease (SBD) on rice, caused by Rhizoctonia solani AG-1 IA, is one of the most devastating rice diseases on a global basis, including China (in Eastern Asia), the world's largest rice-growing country. We analyzed the population genetics of nine rice-infecting populations from China using nine microsatellite loci. One allopatric population from India (Southern Asia) was included in the analyses. In total, 300 different multilocus genotypes were found among 572 fungal isolates. Clonal fractions within rice fields were 16 to 95%, suggesting that sclerotia were a major source of primary inoculum in some fields. Global Phi(ST) statistics (Phi(ST) = 42.49; P <= 0.001) were consistent with a relatively high level of differentiation among populations overall; however, pairwise comparisons gave nonsignificant R(ST) values, consistent with contemporary gene flow among five of the populations. Four of these populations were located along the Yangtze River tributary network. Gene flow followed an isolation-by-distance model consistent with restricted long-distance migration. Historical migration rates were reconstructed and yielded values that explained the current levels of population subdivision. Except for one population which appeared to be strictly clonal, all populations showed evidence of a mixed reproductive mode, including both asexual and sexual reproduction. One population had a strictly recombining structure (all loci were in Hardy-Weinberg equilibrium) but the remaining populations from China and the one from India exhibited varying degrees of sexual reproduction. Six populations showed significant F(IS) values consistent with inbreeding.ETHMicrosoft CorporationETH, Inst Integrat Biol, CH-8092 Zurich, SwitzerlandAnhui Acad Agr Sci, Inst Plant Protect, Hefei 230031, Anhui, Peoples R ChinaHuazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R ChinaChinese Acad Agr Sci, Inst Plant Protect, State key Lab Biol Plant Dis & Insect Pests, Soilborne Dis Lab, Beijing 100081, Peoples R ChinaAgr Acad Zhejiang, Inst Plant Protect, Hangzhou, Zhejiang, Peoples R ChinaUniv Estadual Paulista, Depto Fitossanidade Engn Rural & Solos, BR-15385000 São Paulo, BrazilUniv Estadual Paulista, Depto Fitossanidade Engn Rural & Solos, BR-15385000 São Paulo, BrazilETH: TH-16/06-1Amer Phytopathological SocETHAnhui Acad Agr SciHuazhong Agr UnivChinese Acad Agr SciAgr Acad ZhejiangUniversidade Estadual Paulista (Unesp)Bernardes-de-Assis, JoanaStorari, MichelangeloZala, MarcelloWang, WenxiangJiang, DaohongLi ShiDong,Jin, MeisongMcDonald, Bruce A.Ceresini, Paulo C. [UNESP]2014-05-20T13:30:17Z2014-05-20T13:30:17Z2009-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1090-1099http://dx.doi.org/10.1094/PHYTO-99-9-1090Phytopathology. St Paul: Amer Phytopathological Soc, v. 99, n. 9, p. 1090-1099, 2009.0031-949Xhttp://hdl.handle.net/11449/1027510.1094/PHYTO-99-9-1090WOS:000268876800011Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhytopathology3.036info:eu-repo/semantics/openAccess2024-07-05T18:12:56Zoai:repositorio.unesp.br:11449/10275Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:55:37.005664Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
title Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
spellingShingle Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
Bernardes-de-Assis, Joana
title_short Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
title_full Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
title_fullStr Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
title_full_unstemmed Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
title_sort Genetic Structure of Populations of the Rice-Infecting Pathogen Rhizoctonia solani AG-1 IA from China
author Bernardes-de-Assis, Joana
author_facet Bernardes-de-Assis, Joana
Storari, Michelangelo
Zala, Marcello
Wang, Wenxiang
Jiang, Daohong
Li ShiDong,
Jin, Meisong
McDonald, Bruce A.
Ceresini, Paulo C. [UNESP]
author_role author
author2 Storari, Michelangelo
Zala, Marcello
Wang, Wenxiang
Jiang, Daohong
Li ShiDong,
Jin, Meisong
McDonald, Bruce A.
Ceresini, Paulo C. [UNESP]
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv ETH
Anhui Acad Agr Sci
Huazhong Agr Univ
Chinese Acad Agr Sci
Agr Acad Zhejiang
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Bernardes-de-Assis, Joana
Storari, Michelangelo
Zala, Marcello
Wang, Wenxiang
Jiang, Daohong
Li ShiDong,
Jin, Meisong
McDonald, Bruce A.
Ceresini, Paulo C. [UNESP]
description Sheath blight disease (SBD) on rice, caused by Rhizoctonia solani AG-1 IA, is one of the most devastating rice diseases on a global basis, including China (in Eastern Asia), the world's largest rice-growing country. We analyzed the population genetics of nine rice-infecting populations from China using nine microsatellite loci. One allopatric population from India (Southern Asia) was included in the analyses. In total, 300 different multilocus genotypes were found among 572 fungal isolates. Clonal fractions within rice fields were 16 to 95%, suggesting that sclerotia were a major source of primary inoculum in some fields. Global Phi(ST) statistics (Phi(ST) = 42.49; P <= 0.001) were consistent with a relatively high level of differentiation among populations overall; however, pairwise comparisons gave nonsignificant R(ST) values, consistent with contemporary gene flow among five of the populations. Four of these populations were located along the Yangtze River tributary network. Gene flow followed an isolation-by-distance model consistent with restricted long-distance migration. Historical migration rates were reconstructed and yielded values that explained the current levels of population subdivision. Except for one population which appeared to be strictly clonal, all populations showed evidence of a mixed reproductive mode, including both asexual and sexual reproduction. One population had a strictly recombining structure (all loci were in Hardy-Weinberg equilibrium) but the remaining populations from China and the one from India exhibited varying degrees of sexual reproduction. Six populations showed significant F(IS) values consistent with inbreeding.
publishDate 2009
dc.date.none.fl_str_mv 2009-09-01
2014-05-20T13:30:17Z
2014-05-20T13:30:17Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1094/PHYTO-99-9-1090
Phytopathology. St Paul: Amer Phytopathological Soc, v. 99, n. 9, p. 1090-1099, 2009.
0031-949X
http://hdl.handle.net/11449/10275
10.1094/PHYTO-99-9-1090
WOS:000268876800011
url http://dx.doi.org/10.1094/PHYTO-99-9-1090
http://hdl.handle.net/11449/10275
identifier_str_mv Phytopathology. St Paul: Amer Phytopathological Soc, v. 99, n. 9, p. 1090-1099, 2009.
0031-949X
10.1094/PHYTO-99-9-1090
WOS:000268876800011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Phytopathology
3.036
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dc.format.none.fl_str_mv 1090-1099
dc.publisher.none.fl_str_mv Amer Phytopathological Soc
publisher.none.fl_str_mv Amer Phytopathological Soc
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
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institution UNESP
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