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Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
13/04/2005 |
Data da última atualização: |
13/04/2005 |
Autoria: |
SUDRE, C. P>; RODRIGUES, R.; RIVA, E. M.; KARASAWA, M.; AMARAL JUNIOR, A. T. do. |
Título: |
Divergencia genetica entre acessos de pimenta e pimentao utilizando tecnicas multivariadas. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Horticultura Brasileira, Brasilia, v. 23, n. 1, p. 22-27, jan./mar. 2005 |
Idioma: |
Português |
Palavras-Chave: |
Capsicum sp; Germoplasma; Metodo de Tocher; PImentao; Projecao da distancia no plano; Recurso genetico; Variavel canonica. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00725naa a2200241 a 4500 001 1034896 005 2005-04-13 008 2005 bl uuuu u00u1 u #d 100 1 $aSUDRE, C. P> 245 $aDivergencia genetica entre acessos de pimenta e pimentao utilizando tecnicas multivariadas. 260 $c2005 653 $aCapsicum sp 653 $aGermoplasma 653 $aMetodo de Tocher 653 $aPImentao 653 $aProjecao da distancia no plano 653 $aRecurso genetico 653 $aVariavel canonica 700 1 $aRODRIGUES, R. 700 1 $aRIVA, E. M. 700 1 $aKARASAWA, M. 700 1 $aAMARAL JUNIOR, A. T. do. 773 $tHorticultura Brasileira, Brasilia$gv. 23, n. 1, p. 22-27, jan./mar. 2005
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Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
25/01/2021 |
Data da última atualização: |
25/01/2021 |
Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
Autoria: |
PIVETA, L. B.; BURGOS, N. R.; NOLDIN, J. A.; VIANA, V.; OLIVEIRA, C.; LAMEGO, F. P.; AVILA, L. |
Título: |
Molecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Agriculture, Basel, Switzerland, v. 11, n. 1, p. 1-21, 2021. |
Idioma: |
Inglês |
Conteúdo: |
Rice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat and drought stress, we can discriminate genotypes that perform well under these stress conditions and utilize such genotypes as a source of genetic diversity for rice breeding. MenosRice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat... Mostrar Tudo |
Palavras-Chave: |
Genetic diversity; Heat shock proteins; Photosynthesis. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02343naa a2200229 a 4500 001 1130554 005 2021-01-25 008 2021 bl uuuu u00u1 u #d 100 1 $aPIVETA, L. B. 245 $aMolecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress.$h[electronic resource] 260 $c2021 520 $aRice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat and drought stress, we can discriminate genotypes that perform well under these stress conditions and utilize such genotypes as a source of genetic diversity for rice breeding. 653 $aGenetic diversity 653 $aHeat shock proteins 653 $aPhotosynthesis 700 1 $aBURGOS, N. R. 700 1 $aNOLDIN, J. A. 700 1 $aVIANA, V. 700 1 $aOLIVEIRA, C. 700 1 $aLAMEGO, F. P. 700 1 $aAVILA, L. 773 $tAgriculture, Basel, Switzerland$gv. 11, n. 1, p. 1-21, 2021.
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