Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/185268 |
Resumo: | Foliar diseases impose severe restrictions on the persistence and productivity of Medicago sativa, both of which may be increased by developing disease resistant and more competitive genotypes that can improve pasture quality. We found Curvularia geniculata as the principal alfalfa foliar pathogen in the Brazilian state of Rio Grande do Sul (RS). Growth chamber experiments evaluated the resistance of alfalfa genotypes ‘E1C4’, ‘CPPSul’, ‘ABT 805’ and ‘CUF-101’ to C. geniculata as compared the control ‘Crioula’ genotype. These genotypes were also evaluated in field trials at a sea level site in Eldorado do Sul in central RS and at two sites £200 m above sea level, one in Bagé municipality in south west RS and the other at a farm near the town of Alto Feliz in north east RS. Plants were spray-inoculated with 1.6 x 106 ml-1 of C. geniculata spores and visually evaluated for leaf damage 14 days later. The C. geniculata infection rates varied from zero to 100%. Alfalfa persistence and forage mean dry mass (DM) production at the Eldorado site were measured during different seasons from November 2013 to January 2015 by calculating the incidence of invasive plants and morphologically separating leaves from stems and calculating both leaf and stem DM. Data were analysed using mixed statistical models. The best results for persistence and forage DM were shown by the ‘CPPSul’ genotypes (DM = 16,600 kg ha-1) and ‘Crioula’ (DM = 15,750 kg ha-1). These two genotypes will be used for subsequent investigations and selection cycles. |
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Ávila, Mariana Rockenbach deDall'Agnol, MiguelMartinelli, Jose AntonioSilva, Gerarda Beatriz Pinto daBremm, CarolinaSantos, Tamyris Nunes dos2018-11-30T02:42:32Z20170001-3765http://hdl.handle.net/10183/185268001080702Foliar diseases impose severe restrictions on the persistence and productivity of Medicago sativa, both of which may be increased by developing disease resistant and more competitive genotypes that can improve pasture quality. We found Curvularia geniculata as the principal alfalfa foliar pathogen in the Brazilian state of Rio Grande do Sul (RS). Growth chamber experiments evaluated the resistance of alfalfa genotypes ‘E1C4’, ‘CPPSul’, ‘ABT 805’ and ‘CUF-101’ to C. geniculata as compared the control ‘Crioula’ genotype. These genotypes were also evaluated in field trials at a sea level site in Eldorado do Sul in central RS and at two sites £200 m above sea level, one in Bagé municipality in south west RS and the other at a farm near the town of Alto Feliz in north east RS. Plants were spray-inoculated with 1.6 x 106 ml-1 of C. geniculata spores and visually evaluated for leaf damage 14 days later. The C. geniculata infection rates varied from zero to 100%. Alfalfa persistence and forage mean dry mass (DM) production at the Eldorado site were measured during different seasons from November 2013 to January 2015 by calculating the incidence of invasive plants and morphologically separating leaves from stems and calculating both leaf and stem DM. Data were analysed using mixed statistical models. The best results for persistence and forage DM were shown by the ‘CPPSul’ genotypes (DM = 16,600 kg ha-1) and ‘Crioula’ (DM = 15,750 kg ha-1). These two genotypes will be used for subsequent investigations and selection cycles.application/pdfengAnais da Academia Brasileira de Ciências, Rio de Janeiro, RJ. Vol. 89, n. 3, (jul./set. 2017), p. 1801-1813AlfafaDoença de plantaFungoLeguminosa forrageiraLucerneInvasive plantsFoliar pathogenForage legumesSelection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculatainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001080702.pdf.txt001080702.pdf.txtExtracted Texttext/plain50055http://www.lume.ufrgs.br/bitstream/10183/185268/2/001080702.pdf.txt8460e97edfac6f1c02729a79cc06e854MD52ORIGINAL001080702.pdfTexto completo (inglês)application/pdf822207http://www.lume.ufrgs.br/bitstream/10183/185268/1/001080702.pdf43ffa42d812aac917681d78b91743e28MD5110183/1852682018-12-01 03:13:18.6786oai:www.lume.ufrgs.br:10183/185268Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-12-01T05:13:18Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
title |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
spellingShingle |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata Ávila, Mariana Rockenbach de Alfafa Doença de planta Fungo Leguminosa forrageira Lucerne Invasive plants Foliar pathogen Forage legumes |
title_short |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
title_full |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
title_fullStr |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
title_full_unstemmed |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
title_sort |
Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata |
author |
Ávila, Mariana Rockenbach de |
author_facet |
Ávila, Mariana Rockenbach de Dall'Agnol, Miguel Martinelli, Jose Antonio Silva, Gerarda Beatriz Pinto da Bremm, Carolina Santos, Tamyris Nunes dos |
author_role |
author |
author2 |
Dall'Agnol, Miguel Martinelli, Jose Antonio Silva, Gerarda Beatriz Pinto da Bremm, Carolina Santos, Tamyris Nunes dos |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Ávila, Mariana Rockenbach de Dall'Agnol, Miguel Martinelli, Jose Antonio Silva, Gerarda Beatriz Pinto da Bremm, Carolina Santos, Tamyris Nunes dos |
dc.subject.por.fl_str_mv |
Alfafa Doença de planta Fungo Leguminosa forrageira |
topic |
Alfafa Doença de planta Fungo Leguminosa forrageira Lucerne Invasive plants Foliar pathogen Forage legumes |
dc.subject.eng.fl_str_mv |
Lucerne Invasive plants Foliar pathogen Forage legumes |
description |
Foliar diseases impose severe restrictions on the persistence and productivity of Medicago sativa, both of which may be increased by developing disease resistant and more competitive genotypes that can improve pasture quality. We found Curvularia geniculata as the principal alfalfa foliar pathogen in the Brazilian state of Rio Grande do Sul (RS). Growth chamber experiments evaluated the resistance of alfalfa genotypes ‘E1C4’, ‘CPPSul’, ‘ABT 805’ and ‘CUF-101’ to C. geniculata as compared the control ‘Crioula’ genotype. These genotypes were also evaluated in field trials at a sea level site in Eldorado do Sul in central RS and at two sites £200 m above sea level, one in Bagé municipality in south west RS and the other at a farm near the town of Alto Feliz in north east RS. Plants were spray-inoculated with 1.6 x 106 ml-1 of C. geniculata spores and visually evaluated for leaf damage 14 days later. The C. geniculata infection rates varied from zero to 100%. Alfalfa persistence and forage mean dry mass (DM) production at the Eldorado site were measured during different seasons from November 2013 to January 2015 by calculating the incidence of invasive plants and morphologically separating leaves from stems and calculating both leaf and stem DM. Data were analysed using mixed statistical models. The best results for persistence and forage DM were shown by the ‘CPPSul’ genotypes (DM = 16,600 kg ha-1) and ‘Crioula’ (DM = 15,750 kg ha-1). These two genotypes will be used for subsequent investigations and selection cycles. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017 |
dc.date.accessioned.fl_str_mv |
2018-11-30T02:42:32Z |
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http://hdl.handle.net/10183/185268 |
dc.identifier.issn.pt_BR.fl_str_mv |
0001-3765 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001080702 |
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http://hdl.handle.net/10183/185268 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Anais da Academia Brasileira de Ciências, Rio de Janeiro, RJ. Vol. 89, n. 3, (jul./set. 2017), p. 1801-1813 |
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openAccess |
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