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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
25/01/2019 |
Data da última atualização: |
25/01/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MESQUITA, A. C.; DANTAS, B. F.; CAIRO, P. A. R. |
Afiliação: |
ALESSANDRO CARLOS MESQUITA; BARBARA FRANCA DANTAS, CPATSA; PAULO ARAQUÉM RAMOS CAIRO. |
Título: |
Ecophysiology of Caatinga native species under semi-arid conditions. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Bioscience Journal, v. 34, p. 81-89, dec. 2018. |
Idioma: |
Inglês |
Notas: |
Supplement 1. |
Conteúdo: |
Caatinga is a biome from the Brazilian northeastern semiarid region which needs further studies for the preservation of its native species. The aim of this study was to evaluate the physiological behavior of six native species. The experiment was arranged in six treatments (native species) and three replicates in a randomized block design. Net photosynthesis, transpiration, stomatal conductance, photosynthetic photon flux density, chlorophyll content, and soil moisture were evaluated. According to the results, Mimosa spp. had the lowest levels of chlorophyll content. In all species, water deficit caused significant decrease in transpiration rate and stomatal conductance. M urundeuva and Cnidoscolus spp. can be considered the most sensitive species to drought as changes in those variables also led to the decline in net photosynthesis. The other species can be considered more tolerant to drought, since net photosynthesis did not suffer significant decrease despite the harmful effects of water deficit on transpiration and stomatal conductance. |
Palavras-Chave: |
Bioma Caatinga; Planta da Caatinga; Relação planta-água; Semiárido. |
Thesagro: |
Caatinga; Espécie Nativa; Fotossíntese; Seca. |
Thesaurus Nal: |
Drought. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/191349/1/Barbara-2018.pdf
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Marc: |
LEADER 01776naa a2200265 a 4500 001 2104815 005 2019-01-25 008 2018 bl uuuu u00u1 u #d 100 1 $aMESQUITA, A. C. 245 $aEcophysiology of Caatinga native species under semi-arid conditions.$h[electronic resource] 260 $c2018 500 $aSupplement 1. 520 $aCaatinga is a biome from the Brazilian northeastern semiarid region which needs further studies for the preservation of its native species. The aim of this study was to evaluate the physiological behavior of six native species. The experiment was arranged in six treatments (native species) and three replicates in a randomized block design. Net photosynthesis, transpiration, stomatal conductance, photosynthetic photon flux density, chlorophyll content, and soil moisture were evaluated. According to the results, Mimosa spp. had the lowest levels of chlorophyll content. In all species, water deficit caused significant decrease in transpiration rate and stomatal conductance. M urundeuva and Cnidoscolus spp. can be considered the most sensitive species to drought as changes in those variables also led to the decline in net photosynthesis. The other species can be considered more tolerant to drought, since net photosynthesis did not suffer significant decrease despite the harmful effects of water deficit on transpiration and stomatal conductance. 650 $aDrought 650 $aCaatinga 650 $aEspécie Nativa 650 $aFotossíntese 650 $aSeca 653 $aBioma Caatinga 653 $aPlanta da Caatinga 653 $aRelação planta-água 653 $aSemiárido 700 1 $aDANTAS, B. F. 700 1 $aCAIRO, P. A. R. 773 $tBioscience Journal$gv. 34, p. 81-89, dec. 2018.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
29/11/2022 |
Data da última atualização: |
29/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
ALVES, R. M.; CHAVES, S. F. da S. |
Afiliação: |
RAFAEL MOYSES ALVES, CPATU; SAULO FABRÍCIO DA SILVA CHAVES, UNIVERSIDADE FEDERAL DE VIÇOSA. |
Título: |
Selection of Theobroma grandiflorum clones adapted to agroforestry systems using an additive index. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Acta Scientiarum. Agronomy, v. 45, e57519, 2023. |
DOI: |
https://doi.org/10.4025/actasciagron.v45i1.57519 |
Idioma: |
Inglês |
Conteúdo: |
In fruit tree breeding, selection indices are used to identify the genotypes that combine desirable commercial and non-commercial characteristics. As Theobroma grandiflorum is generally cultivated in agroforestry systems (AFS), there is a need to develop cultivars that are adapted to such environments. In this study, the objective was to select the most promising genotypes for their future use in AFS based on the additive index, a pioneering method for this crop. The trial was carried out for 12 years in an agroforestry system in the municipality of Tomé-Açu, Pará State, Brazil. The 16 evaluated clones were completely randomised with a variable number of repetitions. The average number of fruits produced as well as the morpho-agronomic characteristics of the fruits were analysed. Mixed linear models were used to estimate the components of variance and predict the genotypic values. The genetic correlation between the variables was estimated, and the selection of genotypes was based on the additive index, with a positive orientation of all variables except the thickness of the fruit shells and the weight of the fruits. Clones 42, 44, 46, 47, 57, 61, and 64 performed well for all the analysed variables, resulting in a selection gain of 7.3% and low incidence rates of witches? broom disease. These genotypes can be made available to producers in the form of clones for use in AFS and can further be included in future hybridisations in T. grandiflorum breeding. |
Palavras-Chave: |
Sistema agroflorestal. |
Thesagro: |
Árvore Frutífera; Clone; Índice de Seleção; Parâmetro Genético; Theobroma Grandiflorum. |
Thesaurus NAL: |
Moniliophthora perniciosa; Selection index. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148902/1/57519-Texto-do-artigo-751375259020-1-10-20221122.pdf
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Marc: |
LEADER 02262naa a2200241 a 4500 001 2148902 005 2022-11-29 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.4025/actasciagron.v45i1.57519$2DOI 100 1 $aALVES, R. M. 245 $aSelection of Theobroma grandiflorum clones adapted to agroforestry systems using an additive index.$h[electronic resource] 260 $c2023 520 $aIn fruit tree breeding, selection indices are used to identify the genotypes that combine desirable commercial and non-commercial characteristics. As Theobroma grandiflorum is generally cultivated in agroforestry systems (AFS), there is a need to develop cultivars that are adapted to such environments. In this study, the objective was to select the most promising genotypes for their future use in AFS based on the additive index, a pioneering method for this crop. The trial was carried out for 12 years in an agroforestry system in the municipality of Tomé-Açu, Pará State, Brazil. The 16 evaluated clones were completely randomised with a variable number of repetitions. The average number of fruits produced as well as the morpho-agronomic characteristics of the fruits were analysed. Mixed linear models were used to estimate the components of variance and predict the genotypic values. The genetic correlation between the variables was estimated, and the selection of genotypes was based on the additive index, with a positive orientation of all variables except the thickness of the fruit shells and the weight of the fruits. Clones 42, 44, 46, 47, 57, 61, and 64 performed well for all the analysed variables, resulting in a selection gain of 7.3% and low incidence rates of witches? broom disease. These genotypes can be made available to producers in the form of clones for use in AFS and can further be included in future hybridisations in T. grandiflorum breeding. 650 $aMoniliophthora perniciosa 650 $aSelection index 650 $aÁrvore Frutífera 650 $aClone 650 $aÍndice de Seleção 650 $aParâmetro Genético 650 $aTheobroma Grandiflorum 653 $aSistema agroflorestal 700 1 $aCHAVES, S. F. da S. 773 $tActa Scientiarum. Agronomy$gv. 45, e57519, 2023.
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