Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/s0102-0536-20220105 http://hdl.handle.net/11449/240069 |
Resumo: | High temperatures interfere with lettuce cropping. Thermoinhibition of seed germination and early flowering cause important losses for farmers. The objectives of this work were to evaluate the tolerance to early flowering, to verify the genetic dissimilarity and to select lettuce cultivars tolerant to seed thermoinhibition. 18 cultivars were evaluated. The number of days until the first anthesis was verified for early flowering. Regarding seed thermoinhibition, the first and final germination counting and germination speed index were evaluated, using temperatures of 20, 25, 30 and 35ºC. The analyses were performed immediately after harvest and after six months under storage. The genetic dissimilarity was obtained using the Tocher Graph optimization and hierarchical UPGMA methods. Regression models were adjusted, and curves’ clustering was performed by testing the identity of the models. Early flowering was observed in cultivars Floresta, Colorado, Grand Rapids, and Everglades. Cultivars showed genetic variability and are dissimilar regarding tolerance to thermoinhibition. By clustering the regression equations, it was possible to select thermoinhibition tolerant cultivars. |
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Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seedsFlorecimento precoce, dissimilaridade genética e agrupamento de cultivares de alface com sementes tolerantes à termoinibiçãoanthesisgenetic variabilityLactuca sativamultivariate statisticstemperatureHigh temperatures interfere with lettuce cropping. Thermoinhibition of seed germination and early flowering cause important losses for farmers. The objectives of this work were to evaluate the tolerance to early flowering, to verify the genetic dissimilarity and to select lettuce cultivars tolerant to seed thermoinhibition. 18 cultivars were evaluated. The number of days until the first anthesis was verified for early flowering. Regarding seed thermoinhibition, the first and final germination counting and germination speed index were evaluated, using temperatures of 20, 25, 30 and 35ºC. The analyses were performed immediately after harvest and after six months under storage. The genetic dissimilarity was obtained using the Tocher Graph optimization and hierarchical UPGMA methods. Regression models were adjusted, and curves’ clustering was performed by testing the identity of the models. Early flowering was observed in cultivars Floresta, Colorado, Grand Rapids, and Everglades. Cultivars showed genetic variability and are dissimilar regarding tolerance to thermoinhibition. By clustering the regression equations, it was possible to select thermoinhibition tolerant cultivars.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal de Uberlândia (UFU), MGUniversidade Federal de Minas Gerais Instituto de Ciências Agrárias (UFMG-ICA), MGUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Tecnológicas (UNESP-FCA), SPUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Tecnológicas (UNESP-FCA), SPUniversidade Federal de Uberlândia (UFU)Universidade Federal de Minas Gerais (UFMG)Universidade Estadual Paulista (UNESP)Catão, Hugo Cesar R. M.Gomes, Luiz Antonio AugustoAzevedo, Alcinei M.Siquieroli, Ana Carolina S.Maciel, Gabriel M.Freitas, Pamela G. N. [UNESP]2023-03-01T20:00:05Z2023-03-01T20:00:05Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article39-47http://dx.doi.org/10.1590/s0102-0536-20220105Horticultura Brasileira, v. 40, n. 1, p. 39-47, 2022.0102-0536http://hdl.handle.net/11449/24006910.1590/s0102-0536-202201052-s2.0-85130210708Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengHorticultura Brasileirainfo:eu-repo/semantics/openAccess2023-03-01T20:00:06Zoai:repositorio.unesp.br:11449/240069Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:07:31.163823Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds Florecimento precoce, dissimilaridade genética e agrupamento de cultivares de alface com sementes tolerantes à termoinibição |
title |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
spellingShingle |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds Catão, Hugo Cesar R. M. anthesis genetic variability Lactuca sativa multivariate statistics temperature |
title_short |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
title_full |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
title_fullStr |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
title_full_unstemmed |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
title_sort |
Early flowering, genetic dissimilarity and clustering of lettuce cultivars with thermoinhibition tolerant seeds |
author |
Catão, Hugo Cesar R. M. |
author_facet |
Catão, Hugo Cesar R. M. Gomes, Luiz Antonio Augusto Azevedo, Alcinei M. Siquieroli, Ana Carolina S. Maciel, Gabriel M. Freitas, Pamela G. N. [UNESP] |
author_role |
author |
author2 |
Gomes, Luiz Antonio Augusto Azevedo, Alcinei M. Siquieroli, Ana Carolina S. Maciel, Gabriel M. Freitas, Pamela G. N. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Uberlândia (UFU) Universidade Federal de Minas Gerais (UFMG) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Catão, Hugo Cesar R. M. Gomes, Luiz Antonio Augusto Azevedo, Alcinei M. Siquieroli, Ana Carolina S. Maciel, Gabriel M. Freitas, Pamela G. N. [UNESP] |
dc.subject.por.fl_str_mv |
anthesis genetic variability Lactuca sativa multivariate statistics temperature |
topic |
anthesis genetic variability Lactuca sativa multivariate statistics temperature |
description |
High temperatures interfere with lettuce cropping. Thermoinhibition of seed germination and early flowering cause important losses for farmers. The objectives of this work were to evaluate the tolerance to early flowering, to verify the genetic dissimilarity and to select lettuce cultivars tolerant to seed thermoinhibition. 18 cultivars were evaluated. The number of days until the first anthesis was verified for early flowering. Regarding seed thermoinhibition, the first and final germination counting and germination speed index were evaluated, using temperatures of 20, 25, 30 and 35ºC. The analyses were performed immediately after harvest and after six months under storage. The genetic dissimilarity was obtained using the Tocher Graph optimization and hierarchical UPGMA methods. Regression models were adjusted, and curves’ clustering was performed by testing the identity of the models. Early flowering was observed in cultivars Floresta, Colorado, Grand Rapids, and Everglades. Cultivars showed genetic variability and are dissimilar regarding tolerance to thermoinhibition. By clustering the regression equations, it was possible to select thermoinhibition tolerant cultivars. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 2023-03-01T20:00:05Z 2023-03-01T20:00:05Z |
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/10.1590/s0102-0536-20220105 Horticultura Brasileira, v. 40, n. 1, p. 39-47, 2022. 0102-0536 http://hdl.handle.net/11449/240069 10.1590/s0102-0536-20220105 2-s2.0-85130210708 |
url |
http://dx.doi.org/10.1590/s0102-0536-20220105 http://hdl.handle.net/11449/240069 |
identifier_str_mv |
Horticultura Brasileira, v. 40, n. 1, p. 39-47, 2022. 0102-0536 10.1590/s0102-0536-20220105 2-s2.0-85130210708 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Horticultura Brasileira |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
39-47 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129586810060800 |