Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , |
Tipo de documento: | preprint |
Idioma: | por |
Título da fonte: | SciELO Preprints |
Texto Completo: | https://preprints.scielo.org/index.php/scielo/preprint/view/4678 |
Resumo: | Originating from Tropical America, the culture of guava (Psidium guajava L.) has great relevance for Brazil. However, the emergence of the pathosystem designated as guava decline, a phytosanitary problem caused by root parasitism by nematodes of the species Meloidogyne enterolobii Yang & Eisenback in association with opportunistic fungi, decimated many orchards in all regions of Brazil and other countries. In this work, accessions of guava trees, originated from seeds, were vegetative propagated, by mini cuttings, keeping their genotypes preserved and reassessing the resistance by means of clones in order to verify or not the reactions of host plants. The results point to high virulence of the parasite, as well as high accommodation of the species P. guajava, besides the existence of great variation of the reaction between plants of the same genotype and between different genotypes, indicating that the strategy of germplasm preservation and the reassessment of the reaction in clones may be important in the search and selection of germplasm with some degree of resistance or tolerance characteristics to M. enterolobii. The commercial progeny of cv. Paluma P02R5R2 obtained the lowest mean parasite reproduction factor (RF = 22.11) among the genotypes evaluated, being classified as moderately resistant and preserved for further studies. |
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Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava declinePreservação de genótipos moderadamente resistentes ou tolerantes: uma estratégia para suplantar o declínio da goiabeiravariabilidade genéticacv. Palumafator de reproduçãominiestaquiaMeloidogyne enterolobiigenetic variabilityreproduction factorminicuttingcv. PalumaMeloidogyne enterolobiiOriginating from Tropical America, the culture of guava (Psidium guajava L.) has great relevance for Brazil. However, the emergence of the pathosystem designated as guava decline, a phytosanitary problem caused by root parasitism by nematodes of the species Meloidogyne enterolobii Yang & Eisenback in association with opportunistic fungi, decimated many orchards in all regions of Brazil and other countries. In this work, accessions of guava trees, originated from seeds, were vegetative propagated, by mini cuttings, keeping their genotypes preserved and reassessing the resistance by means of clones in order to verify or not the reactions of host plants. The results point to high virulence of the parasite, as well as high accommodation of the species P. guajava, besides the existence of great variation of the reaction between plants of the same genotype and between different genotypes, indicating that the strategy of germplasm preservation and the reassessment of the reaction in clones may be important in the search and selection of germplasm with some degree of resistance or tolerance characteristics to M. enterolobii. The commercial progeny of cv. Paluma P02R5R2 obtained the lowest mean parasite reproduction factor (RF = 22.11) among the genotypes evaluated, being classified as moderately resistant and preserved for further studies.Originária da América Tropical, a cultura da goiabeira (Psidium guajava L.) tem grande relevância para o Brasil. Contudo, surgimento do patossistema designado como declínio da goiabeira, problema fitossanitário provocado pelo parasitismo das raízes por nematoides da espécie Meloidogyne enterolobii Yang & Eisenback em associação com fungos oportunistas, dizimou muitos pomares em todas as regiões do Brasil e em outros países. No presente estudo, propagou-se vegetativamente, por miniestaquia, acessos de goiabeiras seminíferas mantendo seus genótipos preservados e reavaliando a resistência por meio dos clones de forma a comprovar ou não as reações das plantas hospedeiras. Os resultados apontam para alta virulência do parasita, bem como alta hospedabilidade da espécie P. guajava, além da existência de grande variação da reação entre plantas do mesmo genótipo e entre genótipos distintos, o que indica que a estratégia de preservação do germoplasma e a reavaliação da reação em clones pode ser importante na busca e seleção de germoplasma com algum grau de resistência ou características de tolerância ao M. enterolobii. A progênie da cv. Paluma P02R5R2 obteve a menor média de Fator de Reprodução do parasita (FR = 22,11) entre os genótipos avaliados, sendo classificada como moderadamente resistente e preservada para estudos posteriores.SciELO PreprintsSciELO PreprintsSciELO Preprints2022-08-31info:eu-repo/semantics/preprintinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://preprints.scielo.org/index.php/scielo/preprint/view/467810.1590/SciELOPreprints.4678porhttps://preprints.scielo.org/index.php/scielo/article/view/4678/9035Copyright (c) 2022 Maurício Moisés Pereira Silva, Manoel Abilio de Queiróz, Patrícia Gomes Oliveira, Milena dos Santos Coutinhohttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSilva, Maurício Moisés PereiraQueiróz, Manoel Abilio deOliveira, Patrícia Gomes Coutinho, Milena dos Santosreponame:SciELO Preprintsinstname:SciELOinstacron:SCI2022-08-29T16:56:21Zoai:ops.preprints.scielo.org:preprint/4678Servidor de preprintshttps://preprints.scielo.org/index.php/scieloONGhttps://preprints.scielo.org/index.php/scielo/oaiscielo.submission@scielo.orgopendoar:2022-08-29T16:56:21SciELO Preprints - SciELOfalse |
dc.title.none.fl_str_mv |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline Preservação de genótipos moderadamente resistentes ou tolerantes: uma estratégia para suplantar o declínio da goiabeira |
title |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
spellingShingle |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline Silva, Maurício Moisés Pereira variabilidade genética cv. Paluma fator de reprodução miniestaquia Meloidogyne enterolobii genetic variability reproduction factor minicutting cv. Paluma Meloidogyne enterolobii |
title_short |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
title_full |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
title_fullStr |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
title_full_unstemmed |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
title_sort |
Preservation of moderately resistant or tolerant genotypes: a strategy to overcome guava decline |
author |
Silva, Maurício Moisés Pereira |
author_facet |
Silva, Maurício Moisés Pereira Queiróz, Manoel Abilio de Oliveira, Patrícia Gomes Coutinho, Milena dos Santos |
author_role |
author |
author2 |
Queiróz, Manoel Abilio de Oliveira, Patrícia Gomes Coutinho, Milena dos Santos |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Silva, Maurício Moisés Pereira Queiróz, Manoel Abilio de Oliveira, Patrícia Gomes Coutinho, Milena dos Santos |
dc.subject.por.fl_str_mv |
variabilidade genética cv. Paluma fator de reprodução miniestaquia Meloidogyne enterolobii genetic variability reproduction factor minicutting cv. Paluma Meloidogyne enterolobii |
topic |
variabilidade genética cv. Paluma fator de reprodução miniestaquia Meloidogyne enterolobii genetic variability reproduction factor minicutting cv. Paluma Meloidogyne enterolobii |
description |
Originating from Tropical America, the culture of guava (Psidium guajava L.) has great relevance for Brazil. However, the emergence of the pathosystem designated as guava decline, a phytosanitary problem caused by root parasitism by nematodes of the species Meloidogyne enterolobii Yang & Eisenback in association with opportunistic fungi, decimated many orchards in all regions of Brazil and other countries. In this work, accessions of guava trees, originated from seeds, were vegetative propagated, by mini cuttings, keeping their genotypes preserved and reassessing the resistance by means of clones in order to verify or not the reactions of host plants. The results point to high virulence of the parasite, as well as high accommodation of the species P. guajava, besides the existence of great variation of the reaction between plants of the same genotype and between different genotypes, indicating that the strategy of germplasm preservation and the reassessment of the reaction in clones may be important in the search and selection of germplasm with some degree of resistance or tolerance characteristics to M. enterolobii. The commercial progeny of cv. Paluma P02R5R2 obtained the lowest mean parasite reproduction factor (RF = 22.11) among the genotypes evaluated, being classified as moderately resistant and preserved for further studies. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/preprint info:eu-repo/semantics/publishedVersion |
format |
preprint |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://preprints.scielo.org/index.php/scielo/preprint/view/4678 10.1590/SciELOPreprints.4678 |
url |
https://preprints.scielo.org/index.php/scielo/preprint/view/4678 |
identifier_str_mv |
10.1590/SciELOPreprints.4678 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://preprints.scielo.org/index.php/scielo/article/view/4678/9035 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
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https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
SciELO Preprints SciELO Preprints SciELO Preprints |
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SciELO Preprints SciELO Preprints SciELO Preprints |
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SciELO |
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SCI |
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SCI |
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SciELO Preprints |
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SciELO Preprints |
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SciELO Preprints - SciELO |
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