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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
27/02/2019 |
Data da última atualização: |
27/02/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MATIAS, F. I.; BARRIOS, S. C. L.; BEARARI, L. M.; MEIRELES, K. G. X.; MATEUS, R. G.; AMARAL, P. N. C. do; ALVES, G. F.; VALLE, C. B. do; FRITSCHE-NETO, R. |
Afiliação: |
FILIPE INÁCIO MATIAS, Universidade de São PAULO - USP/Escola Superior de Agricultura Luiz de Queiroz - ESALQ/Departamento de Genética; SANZIO CARVALHO LIMA BARRIOS, CNPGC; LUCAS MARTINS BEARARI, Universidade Estadual de Mato Grosso do Sul - UEMS; KAREM GUIMARAES XAVIER MEIRELES, CNPGC; ROGÉRIO GONÇALVES MATEUS, Universidade Estadual de Mato Grosso do Sul - UEMS; PEDRO NELSON CESAR DO AMARAL, Universidade Estadual de Mato Grosso do Sul - UEMS; GEOVANI FERREIRA ALVES, Universidade Federal de Mato Grosso do Sul - UFMS; CACILDA BORGES DO VALLE, CNPGC; ROBERTO FRITSCHE-NETO, Universidade de São PAULO - USP/Escola Superior de Agricultura Luiz de Queiroz - ESALQ/Departamento de Genética. |
Título: |
Contribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Crop Science, v. 58, n. 6, p. 2444-2458, November/December, 2018. |
Idioma: |
Inglês |
Conteúdo: |
A tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four sexual parents, and (ii) the accuracy of multivariate index selection efficiency. Genetic variability was detected between the parents, crosses, and hybrids for all the traits. There was no clear trend of the importance of the additive and nonadditive genetic effects on agronomical and nutritional traits. Furthermore, the predominant component of genetic variance changed depending on the characteristic. Moreover, there was no parent or cross that was outstanding for all traits simultaneously, showing the high variability generated from these crosses. The Mulamba and Mock index associated with principal components analysis allowed a more significant gain only for agronomic characteristics. However, the per se index, at the univariate level, promoted a more balanced response to selection for all traits. MenosA tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four sexual parents, and (ii) the accuracy of multivariate index selection efficiency. Genetic variability was detected between the parents, crosses, and hybrids for all the traits. There was no clear trend of the importance of the additive and nonadditive genetic effects on agronomical and nutritional traits. Furthermore, the predominant component of genetic variance changed depending on the characteristic. Moreover, there was no parent or cross that was outstanding for all traits simultaneously, showing the high variability generated from these crosses. The Mulamba and Mock index associated with principal components analysis allowed a more significant gain only for agronomic characteristics. However, the per se index, at the univar... Mostrar Tudo |
Thesagro: |
Apomixia; Controle Genético; Cruzamento Animal; Forrageira Tropical; Gramínea Perene; Hibrido. |
Thesaurus Nal: |
Breeding; Grasslands; Hybrids; Livestock; Perennials; Polyploidy; Urochloa. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/193437/1/Contribution-of-additive-and-dominance.pdf
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Marc: |
LEADER 02652naa a2200373 a 4500 001 2106550 005 2019-02-27 008 2018 bl uuuu u00u1 u #d 100 1 $aMATIAS, F. I. 245 $aContribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids.$h[electronic resource] 260 $c2018 520 $aA tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four sexual parents, and (ii) the accuracy of multivariate index selection efficiency. Genetic variability was detected between the parents, crosses, and hybrids for all the traits. There was no clear trend of the importance of the additive and nonadditive genetic effects on agronomical and nutritional traits. Furthermore, the predominant component of genetic variance changed depending on the characteristic. Moreover, there was no parent or cross that was outstanding for all traits simultaneously, showing the high variability generated from these crosses. The Mulamba and Mock index associated with principal components analysis allowed a more significant gain only for agronomic characteristics. However, the per se index, at the univariate level, promoted a more balanced response to selection for all traits. 650 $aBreeding 650 $aGrasslands 650 $aHybrids 650 $aLivestock 650 $aPerennials 650 $aPolyploidy 650 $aUrochloa 650 $aApomixia 650 $aControle Genético 650 $aCruzamento Animal 650 $aForrageira Tropical 650 $aGramínea Perene 650 $aHibrido 700 1 $aBARRIOS, S. C. L. 700 1 $aBEARARI, L. M. 700 1 $aMEIRELES, K. G. X. 700 1 $aMATEUS, R. G. 700 1 $aAMARAL, P. N. C. do 700 1 $aALVES, G. F. 700 1 $aVALLE, C. B. do 700 1 $aFRITSCHE-NETO, R. 773 $tCrop Science$gv. 58, n. 6, p. 2444-2458, November/December, 2018.
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Embrapa Gado de Corte (CNPGC) |
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Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
28/03/2022 |
Data da última atualização: |
29/04/2022 |
Autoria: |
OLIVEIRA, M. G.; SANTOS, G. G. A.; LAQUES, A.-E.; THALÊS, M. C.; MITJA, D.; MIRANDA, I. S. |
Título: |
Métricas da paisagem e quantidade de habitat florestal em um mosaico agrícola, sudeste do Pará. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, v. 42, e201902023, 2022. |
Páginas: |
p. 1-8. |
ISSN: |
1983-2605 |
DOI: |
https://doi.org/10.4336/2022.pfb.42e201902023 |
Idioma: |
Português |
Notas: |
Nota científica. |
Conteúdo: |
RESUMO. O objetivo deste estudo foi analisar a influência da estrutura da paisagem sobre a estrutura da vegetação, de acordo com a escala de investigação. O estudo foi desenvolvido no Assentamento Agroextrativista Praialta Piranheira, localizado em Nova Ipixuna, PA. Foi utilizado inventário florístico (variáveis da vegetação) e imagem de satélite (métricas da paisagem). As parcelas foram espacializadas em buffers com circunferências de 100, 200, 300 e 500 m. Observou-se influência das métricas da paisagem, em especial da quantidade de habitat florestal, sobre a estrutura da vegetação e a necessidade de se selecionar as métricas mais adequadas ao tipo de estudo realizado. TITLE. Landscape metrics and amount of forest habitat in an agricultural mosaic, Southeast of Pará. ABSTRACT. The objective of this study was to analyze the influence of the landscape structure on the vegetation structure and how this influence is affected by investigation scale. The study was carried out in the Agroextractivist Settlement Praialta Piranheira, Nova Ipixuna, Para State, Brazil. We used floristic inventory (vegetation variables) and satellite image (landscape metrics). The sample plots were spatialized in buffers (100, 200, 300 and 500 m of circumference). We observed influence of landscape metrics, especially the amount of forest habitat, on the vegetation structure and the importance to select the most suitable metrics considering the study objective. |
Palavras-Chave: |
Amazon; Diversidade de plantas; Forest fragments; Fragmentos florestais; Plant diversity. |
Thesaurus NAL: |
Amazonia. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/233004/1/EmbrapaFlorestas-PFB-2022-MetricasDaPaisagem.pdf
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Marc: |
LEADER 02380naa a2200301 a 4500 001 2141388 005 2022-04-29 008 2022 bl uuuu u00u1 u #d 022 $a1983-2605 024 7 $ahttps://doi.org/10.4336/2022.pfb.42e201902023$2DOI 100 1 $aOLIVEIRA, M. G. 245 $aMétricas da paisagem e quantidade de habitat florestal em um mosaico agrícola, sudeste do Pará.$h[electronic resource] 260 $c2022 300 $ap. 1-8. 500 $aNota científica. 520 $aRESUMO. O objetivo deste estudo foi analisar a influência da estrutura da paisagem sobre a estrutura da vegetação, de acordo com a escala de investigação. O estudo foi desenvolvido no Assentamento Agroextrativista Praialta Piranheira, localizado em Nova Ipixuna, PA. Foi utilizado inventário florístico (variáveis da vegetação) e imagem de satélite (métricas da paisagem). As parcelas foram espacializadas em buffers com circunferências de 100, 200, 300 e 500 m. Observou-se influência das métricas da paisagem, em especial da quantidade de habitat florestal, sobre a estrutura da vegetação e a necessidade de se selecionar as métricas mais adequadas ao tipo de estudo realizado. TITLE. Landscape metrics and amount of forest habitat in an agricultural mosaic, Southeast of Pará. ABSTRACT. The objective of this study was to analyze the influence of the landscape structure on the vegetation structure and how this influence is affected by investigation scale. The study was carried out in the Agroextractivist Settlement Praialta Piranheira, Nova Ipixuna, Para State, Brazil. We used floristic inventory (vegetation variables) and satellite image (landscape metrics). The sample plots were spatialized in buffers (100, 200, 300 and 500 m of circumference). We observed influence of landscape metrics, especially the amount of forest habitat, on the vegetation structure and the importance to select the most suitable metrics considering the study objective. 650 $aAmazonia 653 $aAmazon 653 $aDiversidade de plantas 653 $aForest fragments 653 $aFragmentos florestais 653 $aPlant diversity 700 1 $aSANTOS, G. G. A. 700 1 $aLAQUES, A.-E. 700 1 $aTHALÊS, M. C. 700 1 $aMITJA, D. 700 1 $aMIRANDA, I. S. 773 $tPesquisa Florestal Brasileira, Colombo$gv. 42, e201902023, 2022.
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Embrapa Florestas (CNPF) |
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