Water-deficit tolerance of landrace and improved corn genotypes

Water-deficit tolerance of landrace and improved corn genotypes

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The objective of this work was to evaluate the yield, leaf area, stomatal conductance, photosynthesis, transpiration, and critical fraction of transpirable soil water (FTSWc) of hybrid and landrace corn (Zea mays) genotypes, as affected by the water deficit characterized by the FTSW. Two experiments were carried out in the 2015/2016 and 2016/2017 crop years: one in the field and the other in a greenhouse. The following genotypes were evaluated in irrigated and nonirrigated systems: the Cinquentinha and Bico de Ouro landraces and the AS 1573PRO improved cultivar. Yield in the field was higher for 'AS 1573PRO', followed by Bico de Ouro and Cinquentinha in both evaluation years. Water deficit reduces stomatal opening, photosynthesis, and transpiration rate, resulting in the total closure of the stomata of 'AS 1573PRO' and Bico de Ouro, and in the partial closure of those of Cinquentinha. There was a reduction in the leaf area of 'AS 1573PRO', Bico de Ouro, and Cinquentinha under water deficit during the reproductive period. In the first crop year under water deficit conditions, 'AS 1573PRO' and Cinquentinha show a high tolerance to water deficit with a FTSWc of 0.71, and 'AS 1573PRO' also shows the highest tolerance in the second crop year with a FTSWc of 0.73. Moreover, Bico de Ouro is sensitive to water deficit in the two crop years.

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Main Authors: Langne, Josana Andreia, Lago, Isabel, Reiniger, Lia Rejane Silveira, Petry, Mirta Teresinha, Streck, Nereu Augusto, Durigon, Angelica, Pohlmann, Valeria, Freitas, Charles Patrick de Oliveira de, Slim, Taís, Silva, Stefanía Dalmolin da
Format: Digital revista
Language:eng
Published: Pesquisa Agropecuaria Brasileira 2022
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/27067
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spelling rev-pab-br-article-270672022-05-18T18:27:35Z Water-deficit tolerance of landrace and improved corn genotypes Tolerância ao deficit hídrico de genótipos de milho crioulo e melhorado Langne, Josana Andreia Lago, Isabel Reiniger, Lia Rejane Silveira Petry, Mirta Teresinha Streck, Nereu Augusto Durigon, Angelica Pohlmann, Valeria Freitas, Charles Patrick de Oliveira de Slim, Taís Silva, Stefanía Dalmolin da Zea mays; critical FTSW; genetic variability Zea mays; FATS crítica; variabilidade genética The objective of this work was to evaluate the yield, leaf area, stomatal conductance, photosynthesis, transpiration, and critical fraction of transpirable soil water (FTSWc) of hybrid and landrace corn (Zea mays) genotypes, as affected by the water deficit characterized by the FTSW. Two experiments were carried out in the 2015/2016 and 2016/2017 crop years: one in the field and the other in a greenhouse. The following genotypes were evaluated in irrigated and nonirrigated systems: the Cinquentinha and Bico de Ouro landraces and the AS 1573PRO improved cultivar. Yield in the field was higher for 'AS 1573PRO', followed by Bico de Ouro and Cinquentinha in both evaluation years. Water deficit reduces stomatal opening, photosynthesis, and transpiration rate, resulting in the total closure of the stomata of 'AS 1573PRO' and Bico de Ouro, and in the partial closure of those of Cinquentinha. There was a reduction in the leaf area of 'AS 1573PRO', Bico de Ouro, and Cinquentinha under water deficit during the reproductive period. In the first crop year under water deficit conditions, 'AS 1573PRO' and Cinquentinha show a high tolerance to water deficit with a FTSWc of 0.71, and 'AS 1573PRO' also shows the highest tolerance in the second crop year with a FTSWc of 0.73. Moreover, Bico de Ouro is sensitive to water deficit in the two crop years. O objetivo deste trabalho foi avaliar a produtividade, a área foliar, a condutância estomática, a fotossíntese, a transpiração e a fração de água transpirável no solo crítica (FATSc) de genótipos de milho híbrido e crioulo, em função do deficit hídrico caracterizado pela FATS. Foram realizados dois experimentos, nos anos agrícolas de 2015/2016 e 2016/2017: um a campo e outro em casa de vegetação. Os seguintes genótipos foram avaliados em sistema irrigado e não irrigado: os crioulos Cinquentinha e Bico de Ouro e a cultivar melhorada AS 1573PRO. A produtividade a campo é maior para 'AS 1573PRO', seguida por Bico de Ouro e Cinquentinha, em ambos os anos de avalição. O deficit hídrico reduz a abertura estomática, a fotossíntese e a taxa de transpiração, o que resulta no fechamento total dos estômatos de 'AS 1573PRO' e Bico de Ouro, e no fechamento parcial dos de Cinquentinha. Houve redução da área foliar de 'AS 1573PRO', Bico de Ouro e Cinquentinha sob deficit hídrico durante o período reprodutivo. No primeiro ano agrícola sob condições de deficit hídrico, 'AS 1573PRO' e Cinquentinha mostram alta tolerância ao deficit hídrico com FTSWc de 0,71, e 'AS 1573PRO' também mostra a maior tolerância no segundo ano agrícola com FTSWc de 0,73. Além disso, Bico de Ouro apresenta sensibilidade ao deficit hídrico nos dois anos agrícolas. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Coordenação de Aperfeiçoamento de Pessoal de Nível Superior 2022-05-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/27067 Pesquisa Agropecuaria Brasileira; V.56, Jan./Dec., 2021: Publicação contínua em volume anual; e02627 Pesquisa Agropecuária Brasileira; V.56, Jan./Dec., 2021: Publicação contínua em volume anual; e02627 1678-3921 0100-104x eng https://seer.sct.embrapa.br/index.php/pab/article/view/27067/14977 Direitos autorais 2022 Pesquisa Agropecuária Brasileira
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language eng
format Digital
author Langne, Josana Andreia
Lago, Isabel
Reiniger, Lia Rejane Silveira
Petry, Mirta Teresinha
Streck, Nereu Augusto
Durigon, Angelica
Pohlmann, Valeria
Freitas, Charles Patrick de Oliveira de
Slim, Taís
Silva, Stefanía Dalmolin da
spellingShingle Langne, Josana Andreia
Lago, Isabel
Reiniger, Lia Rejane Silveira
Petry, Mirta Teresinha
Streck, Nereu Augusto
Durigon, Angelica
Pohlmann, Valeria
Freitas, Charles Patrick de Oliveira de
Slim, Taís
Silva, Stefanía Dalmolin da
Water-deficit tolerance of landrace and improved corn genotypes
author_facet Langne, Josana Andreia
Lago, Isabel
Reiniger, Lia Rejane Silveira
Petry, Mirta Teresinha
Streck, Nereu Augusto
Durigon, Angelica
Pohlmann, Valeria
Freitas, Charles Patrick de Oliveira de
Slim, Taís
Silva, Stefanía Dalmolin da
author_sort Langne, Josana Andreia
title Water-deficit tolerance of landrace and improved corn genotypes
title_short Water-deficit tolerance of landrace and improved corn genotypes
title_full Water-deficit tolerance of landrace and improved corn genotypes
title_fullStr Water-deficit tolerance of landrace and improved corn genotypes
title_full_unstemmed Water-deficit tolerance of landrace and improved corn genotypes
title_sort water-deficit tolerance of landrace and improved corn genotypes
description The objective of this work was to evaluate the yield, leaf area, stomatal conductance, photosynthesis, transpiration, and critical fraction of transpirable soil water (FTSWc) of hybrid and landrace corn (Zea mays) genotypes, as affected by the water deficit characterized by the FTSW. Two experiments were carried out in the 2015/2016 and 2016/2017 crop years: one in the field and the other in a greenhouse. The following genotypes were evaluated in irrigated and nonirrigated systems: the Cinquentinha and Bico de Ouro landraces and the AS 1573PRO improved cultivar. Yield in the field was higher for 'AS 1573PRO', followed by Bico de Ouro and Cinquentinha in both evaluation years. Water deficit reduces stomatal opening, photosynthesis, and transpiration rate, resulting in the total closure of the stomata of 'AS 1573PRO' and Bico de Ouro, and in the partial closure of those of Cinquentinha. There was a reduction in the leaf area of 'AS 1573PRO', Bico de Ouro, and Cinquentinha under water deficit during the reproductive period. In the first crop year under water deficit conditions, 'AS 1573PRO' and Cinquentinha show a high tolerance to water deficit with a FTSWc of 0.71, and 'AS 1573PRO' also shows the highest tolerance in the second crop year with a FTSWc of 0.73. Moreover, Bico de Ouro is sensitive to water deficit in the two crop years.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2022
url https://seer.sct.embrapa.br/index.php/pab/article/view/27067
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