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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
14/04/2020 |
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Data da última atualização: |
20/04/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PIRES, M. V.; CASTRO, E. M. de; FREITAS, B. S. M. de; LIRA, J. M. S.; MAGALHAES, P. C.; PEREIRA, M. P. |
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Afiliação: |
Mateus Vilela Pires, Universidade Federal de Lavras; Evaristo Mauro de Castro, Universidade Federal de Lavras; Bethânia Silva Morais de Freitas, Universidade Federal de Lavras; Jean Marcel Souza Lira, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; Marcio Paulo Pereira, Universidade Federal de Lavras. |
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Título: |
Yield-related phenotypic traits of drought resistant maize genotypes. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Environmental and Experimental Botany, v. 171, article 103962, 2020. |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this study was to evaluate two maize genotypes with contrasting drought-resistant phenotypic traits and to characterize how the plastic phenotypic traits contribute to yield potential under drought. The maize genotypes DKB 390 and BRS 1010 present contrasting yield traits in relation to drought and were treated with two water regimes: well-watered plant (WW, ??2 kPa) and water deficit (WD, ??100 kPa). In WD conditions, DKB 390 had a greater capacity to accumulate biomass in shoots than BRS 1010, indicating that shoot traits are important in increasing yield gain in the DKB 390 drought tolerant genotype and therefore, an important phenotypic trait for breeding for high yield in drought conditions. However, neither the total root dry mass nor its ratio to the shoot was related to increased yield. A large reduction in gas exchange and increased water use efficiency was observed in BRS 1010 compared to DKB 390. These traits are likely related to yield loss mainly due to decreased transpiration rate and stomatal conductance, which led to low photosynthetic rates and reduced growth. The root angle between genotypes was a constitutive trait and can be primarily responsible for the differences in yield. However, this trait in the DKB 390 genotype was affected by WD, as indicated by narrowing of the root angle. Our work describes the relationship between the narrow root growth angle in DKB 390 and its association with an increased capacity for water uptake in deeper regions, which may result in higher yield under drought. Regarding leaf anatomy we hypothesized that both osmotic adjustment and cell wall properties can influence anisotropic cell expansion under WD conditions and result in leaf tissue with higher yield potential in DKB 390. The high plasticity of vascular tissues and wide vessels could indicate a greater propensity for embolism and a slower response to WD, leading to yield loss in BRS 1010. The results of the phenotypic plasticity of maize genotypes show a negative relationship between high plasticity and yield potential and suggest that high plasticity can result in higher yield potential only when are present in phenotypic traits responsible for higher water uptake and drought tolerance. MenosThe aim of this study was to evaluate two maize genotypes with contrasting drought-resistant phenotypic traits and to characterize how the plastic phenotypic traits contribute to yield potential under drought. The maize genotypes DKB 390 and BRS 1010 present contrasting yield traits in relation to drought and were treated with two water regimes: well-watered plant (WW, ??2 kPa) and water deficit (WD, ??100 kPa). In WD conditions, DKB 390 had a greater capacity to accumulate biomass in shoots than BRS 1010, indicating that shoot traits are important in increasing yield gain in the DKB 390 drought tolerant genotype and therefore, an important phenotypic trait for breeding for high yield in drought conditions. However, neither the total root dry mass nor its ratio to the shoot was related to increased yield. A large reduction in gas exchange and increased water use efficiency was observed in BRS 1010 compared to DKB 390. These traits are likely related to yield loss mainly due to decreased transpiration rate and stomatal conductance, which led to low photosynthetic rates and reduced growth. The root angle between genotypes was a constitutive trait and can be primarily responsible for the differences in yield. However, this trait in the DKB 390 genotype was affected by WD, as indicated by narrowing of the root angle. Our work describes the relationship between the narrow root growth angle in DKB 390 and its association with an increased capacity for water uptake in deeper region... Mostrar Tudo |
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Palavras-Chave: |
Anatomia foliar; Déficit hídrico. |
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Thesagro: |
Genótipo; Milho; Resistência a Seca. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/212313/1/Yield-related.pdf
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Marc: |
LEADER 02942naa a2200241 a 4500
001 2121631
005 2020-04-20
008 2020 bl uuuu u00u1 u #d
100 1 $aPIRES, M. V.
245 $aYield-related phenotypic traits of drought resistant maize genotypes.$h[electronic resource]
260 $c2020
520 $aThe aim of this study was to evaluate two maize genotypes with contrasting drought-resistant phenotypic traits and to characterize how the plastic phenotypic traits contribute to yield potential under drought. The maize genotypes DKB 390 and BRS 1010 present contrasting yield traits in relation to drought and were treated with two water regimes: well-watered plant (WW, ??2 kPa) and water deficit (WD, ??100 kPa). In WD conditions, DKB 390 had a greater capacity to accumulate biomass in shoots than BRS 1010, indicating that shoot traits are important in increasing yield gain in the DKB 390 drought tolerant genotype and therefore, an important phenotypic trait for breeding for high yield in drought conditions. However, neither the total root dry mass nor its ratio to the shoot was related to increased yield. A large reduction in gas exchange and increased water use efficiency was observed in BRS 1010 compared to DKB 390. These traits are likely related to yield loss mainly due to decreased transpiration rate and stomatal conductance, which led to low photosynthetic rates and reduced growth. The root angle between genotypes was a constitutive trait and can be primarily responsible for the differences in yield. However, this trait in the DKB 390 genotype was affected by WD, as indicated by narrowing of the root angle. Our work describes the relationship between the narrow root growth angle in DKB 390 and its association with an increased capacity for water uptake in deeper regions, which may result in higher yield under drought. Regarding leaf anatomy we hypothesized that both osmotic adjustment and cell wall properties can influence anisotropic cell expansion under WD conditions and result in leaf tissue with higher yield potential in DKB 390. The high plasticity of vascular tissues and wide vessels could indicate a greater propensity for embolism and a slower response to WD, leading to yield loss in BRS 1010. The results of the phenotypic plasticity of maize genotypes show a negative relationship between high plasticity and yield potential and suggest that high plasticity can result in higher yield potential only when are present in phenotypic traits responsible for higher water uptake and drought tolerance.
650 $aGenótipo
650 $aMilho
650 $aResistência a Seca
653 $aAnatomia foliar
653 $aDéficit hídrico
700 1 $aCASTRO, E. M. de
700 1 $aFREITAS, B. S. M. de
700 1 $aLIRA, J. M. S.
700 1 $aMAGALHAES, P. C.
700 1 $aPEREIRA, M. P.
773 $tEnvironmental and Experimental Botany$gv. 171, article 103962, 2020.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
31/10/2005 |
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Data da última atualização: |
24/04/2013 |
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Autoria: |
OLIVEIRA, J. S. e; SOBRINHO, F. de S. |
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Afiliação: |
Embrapa Gado de Leite. |
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Título: |
Cultivares de milho para silagem: resultados das safras 2002/2003 e 2003/2004. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Juiz de Fora: Embrapa Gado de Leite, 2004. |
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Páginas: |
10 p. |
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Série: |
(Embrapa Gado de Leite. Circular Técnica, 81). |
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Idioma: |
Português |
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Conteúdo: |
Material e métodos; Avaliação agronômicas; Análise bromatólgicas; Estimativas de produção de leite; Análise estatísticas; Critérios de recomendação; Resultados e discussão; Região do Brasil-Central; Região Sudeste; Região Sul; Conclusões. |
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Palavras-Chave: |
Milho - silagem. |
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Thesagro: |
Milho; Nutrição Animal; Silagem. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/65264/1/CT-81-Cultiv-milho-silagem.pdf
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Marc: |
LEADER 00818nam a2200193 a 4500
001 1594954
005 2013-04-24
008 2004 bl uuuu u0uu1 u #d
100 1 $aOLIVEIRA, J. S. e
245 $aCultivares de milho para silagem$bresultados das safras 2002/2003 e 2003/2004.
260 $aJuiz de Fora: Embrapa Gado de Leite$c2004
300 $a10 p.
490 $a(Embrapa Gado de Leite. Circular Técnica, 81).
520 $aMaterial e métodos; Avaliação agronômicas; Análise bromatólgicas; Estimativas de produção de leite; Análise estatísticas; Critérios de recomendação; Resultados e discussão; Região do Brasil-Central; Região Sudeste; Região Sul; Conclusões.
650 $aMilho
650 $aNutrição Animal
650 $aSilagem
653 $aMilho - silagem
700 1 $aSOBRINHO, F. de S.
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Embrapa Gado de Leite (CNPGL) |
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