Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.15258/sst.2004.32.1.13 http://hdl.handle.net/11449/219364 |
Resumo: | 'Brasília' is a cultivar of carrot with characteristics suiting cultivation under hot conditions but with problems in seed production, arising from the conflicting requirements of root and seed production. One solution is to select cultivars requiring vernalisation and then to use GA3 to induce flowering where the climate prevents this. There is, however, little information on plant population, seed maturity and harvesting time on which to base such a procedure. Accordingly this research was carried out to study the physiological quality and production of the seeds in plant populations from 25,000 to 800,000 plants/ha, in the seed-to-seed method of cv. Brasília in Anápolis, GO, Brazil. In each population, two harvest methods (from first and second orders of umbels, or selected harvest, and remaining orders, or total harvest) and two stages of maturity (brownish, or mature seeds, and yellowish, or immature ones) were also evaluated. Two trials were carried out, with and without gibberellic acid. Seed was evaluated for physical characters, germination, vigour, 1000-seed weight, water content, dry matter and productivity. Seed was produced in both experiments (with or without GA3 spraying). Mature seed showed germination at least 30% greater than immature, and seed from the selected harvest showed germination 16% greater than from the total harvest. In increasing plant population to 200,000 plants/ha, seed quality was not affected, but productivity increased. |
id |
UNSP_341028588189151b86e59258f5675ee8 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/219364 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity'Brasília' is a cultivar of carrot with characteristics suiting cultivation under hot conditions but with problems in seed production, arising from the conflicting requirements of root and seed production. One solution is to select cultivars requiring vernalisation and then to use GA3 to induce flowering where the climate prevents this. There is, however, little information on plant population, seed maturity and harvesting time on which to base such a procedure. Accordingly this research was carried out to study the physiological quality and production of the seeds in plant populations from 25,000 to 800,000 plants/ha, in the seed-to-seed method of cv. Brasília in Anápolis, GO, Brazil. In each population, two harvest methods (from first and second orders of umbels, or selected harvest, and remaining orders, or total harvest) and two stages of maturity (brownish, or mature seeds, and yellowish, or immature ones) were also evaluated. Two trials were carried out, with and without gibberellic acid. Seed was evaluated for physical characters, germination, vigour, 1000-seed weight, water content, dry matter and productivity. Seed was produced in both experiments (with or without GA3 spraying). Mature seed showed germination at least 30% greater than immature, and seed from the selected harvest showed germination 16% greater than from the total harvest. In increasing plant population to 200,000 plants/ha, seed quality was not affected, but productivity increased.Div. Tec. de Produção Dep. Parques e Áreas Verdes Prefeitura do Municipio de S. Paulo, Av. Quarto Centenario, Portao 7A, Parque do Ibirapuera, Sao Paulo, SPUnidade de Pesquisa de Anapolis Empresa Assistencia Tec. Extensao R., P.O. Box 608, 75001-970 Anápolis, GOFaculdade de Cie. Agronômicas Universidade Estadual Paulista, P.O. Box 237, 18603-970 Botucatu, SPSecao Sementes e Melhoramento Veg. Instituto de Botânica, P.O. Box 4005, 01061-970 São Paulo, SPFaculdade de Cie. Agronômicas Universidade Estadual Paulista, P.O. Box 237, 18603-970 Botucatu, SPPrefeitura do Municipio de S. PauloEmpresa Assistencia Tec. Extensao R.Universidade Estadual Paulista (UNESP)Instituto de BotânicaBarbedo, A. S.C.Peixoto, N.Câmara, F. L.A. [UNESP]Nakagawa, J. [UNESP]Barbedo, C. J.2022-04-28T18:55:10Z2022-04-28T18:55:10Z2004-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article119-134http://dx.doi.org/10.15258/sst.2004.32.1.13Seed Science and Technology, v. 32, n. 1, p. 119-134, 2004.0251-0952http://hdl.handle.net/11449/21936410.15258/sst.2004.32.1.132-s2.0-2642574473Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSeed Science and Technologyinfo:eu-repo/semantics/openAccess2022-04-28T18:55:10Zoai:repositorio.unesp.br:11449/219364Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:43:41.207222Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
title |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
spellingShingle |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity Barbedo, A. S.C. |
title_short |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
title_full |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
title_fullStr |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
title_full_unstemmed |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
title_sort |
Yield and quality of carrot seeds, cv. Brasília, as a result of plant population, gibberellic acid and stage of maturity |
author |
Barbedo, A. S.C. |
author_facet |
Barbedo, A. S.C. Peixoto, N. Câmara, F. L.A. [UNESP] Nakagawa, J. [UNESP] Barbedo, C. J. |
author_role |
author |
author2 |
Peixoto, N. Câmara, F. L.A. [UNESP] Nakagawa, J. [UNESP] Barbedo, C. J. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Prefeitura do Municipio de S. Paulo Empresa Assistencia Tec. Extensao R. Universidade Estadual Paulista (UNESP) Instituto de Botânica |
dc.contributor.author.fl_str_mv |
Barbedo, A. S.C. Peixoto, N. Câmara, F. L.A. [UNESP] Nakagawa, J. [UNESP] Barbedo, C. J. |
description |
'Brasília' is a cultivar of carrot with characteristics suiting cultivation under hot conditions but with problems in seed production, arising from the conflicting requirements of root and seed production. One solution is to select cultivars requiring vernalisation and then to use GA3 to induce flowering where the climate prevents this. There is, however, little information on plant population, seed maturity and harvesting time on which to base such a procedure. Accordingly this research was carried out to study the physiological quality and production of the seeds in plant populations from 25,000 to 800,000 plants/ha, in the seed-to-seed method of cv. Brasília in Anápolis, GO, Brazil. In each population, two harvest methods (from first and second orders of umbels, or selected harvest, and remaining orders, or total harvest) and two stages of maturity (brownish, or mature seeds, and yellowish, or immature ones) were also evaluated. Two trials were carried out, with and without gibberellic acid. Seed was evaluated for physical characters, germination, vigour, 1000-seed weight, water content, dry matter and productivity. Seed was produced in both experiments (with or without GA3 spraying). Mature seed showed germination at least 30% greater than immature, and seed from the selected harvest showed germination 16% greater than from the total harvest. In increasing plant population to 200,000 plants/ha, seed quality was not affected, but productivity increased. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01 2022-04-28T18:55:10Z 2022-04-28T18:55:10Z |
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/10.15258/sst.2004.32.1.13 Seed Science and Technology, v. 32, n. 1, p. 119-134, 2004. 0251-0952 http://hdl.handle.net/11449/219364 10.15258/sst.2004.32.1.13 2-s2.0-2642574473 |
url |
http://dx.doi.org/10.15258/sst.2004.32.1.13 http://hdl.handle.net/11449/219364 |
identifier_str_mv |
Seed Science and Technology, v. 32, n. 1, p. 119-134, 2004. 0251-0952 10.15258/sst.2004.32.1.13 2-s2.0-2642574473 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Seed Science and Technology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
119-134 |
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_ |
1808128691953205248 |