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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
29/03/2021 |
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Data da última atualização: |
29/03/2021 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
PIVETA, L. B.; NOLDIN, J. A.; BURGOS, N. R.; VIANA, V. E.; BENEDETTI, L.; PINTO, J. J. O.; LAMEGO, F. P.; AVILA, L. A. |
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Título: |
Weedy Rice Diversity in Southern Brazil. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Weed Science, Cambridge, UK, v.69 , n.2 , p. 1-37, 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
Weedy rice (Oryza sativa L.) is one of the most troublesome weeds affecting rice (Oryza sativa L.) production in many countries. Weedy rice control is difficult in rice fields because the weed and crop are phenotypically and morphologically similar. Weedy rice can be a source of genetic diversity to cultivated rice. Thus, this study aimed to characterize the morphological diversity of weedy rice in Southern Brazil. Qualitative and quantitative traits of 249 accessions from eight rice growing mesoregions in Rio Grande do Sul (RS) and Santa Catarina (SC) states were analyzed. For each accession, 24 morphological descriptors (14 qualitative and 10 quantitative) were evaluated. All the 249 accessions from RS and SC are of indica lineage. Considering all the phenotypic traits evaluated, the accessions separated into 14 distinct groups. One of the largest groups consisted of plants that were predominantly tall and with green leaves, intermediate shattering, and variable in flowering time. Distinct subgroups exist within larger clusters, showing discernable phenotypic diversity within the main clusters. The variability in flowering time was high (77 to 110 d after emergence), indicating high potential for flowering synchrony with rice cultivars and, consequently, gene flow. This indicates the need to remove escapes when
planting herbicide-resistant rice. Thus, weedy rice populations in Southern Brazil are highly diverse and this diversity could result in variable response to weed management. MenosWeedy rice (Oryza sativa L.) is one of the most troublesome weeds affecting rice (Oryza sativa L.) production in many countries. Weedy rice control is difficult in rice fields because the weed and crop are phenotypically and morphologically similar. Weedy rice can be a source of genetic diversity to cultivated rice. Thus, this study aimed to characterize the morphological diversity of weedy rice in Southern Brazil. Qualitative and quantitative traits of 249 accessions from eight rice growing mesoregions in Rio Grande do Sul (RS) and Santa Catarina (SC) states were analyzed. For each accession, 24 morphological descriptors (14 qualitative and 10 quantitative) were evaluated. All the 249 accessions from RS and SC are of indica lineage. Considering all the phenotypic traits evaluated, the accessions separated into 14 distinct groups. One of the largest groups consisted of plants that were predominantly tall and with green leaves, intermediate shattering, and variable in flowering time. Distinct subgroups exist within larger clusters, showing discernable phenotypic diversity within the main clusters. The variability in flowering time was high (77 to 110 d after emergence), indicating high potential for flowering synchrony with rice cultivars and, consequently, gene flow. This indicates the need to remove escapes when
planting herbicide-resistant rice. Thus, weedy rice populations in Southern Brazil are highly diverse and this diversity could result in variable response to weed m... Mostrar Tudo |
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Palavras-Chave: |
cluster analysis; morphological characterization; phenological diversity; plant traits; red rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02235naa a2200265 a 4500
001 1130699
005 2021-03-29
008 2021 bl uuuu u00u1 u #d
100 1 $aPIVETA, L. B.
245 $aWeedy Rice Diversity in Southern Brazil.$h[electronic resource]
260 $c2021
520 $aWeedy rice (Oryza sativa L.) is one of the most troublesome weeds affecting rice (Oryza sativa L.) production in many countries. Weedy rice control is difficult in rice fields because the weed and crop are phenotypically and morphologically similar. Weedy rice can be a source of genetic diversity to cultivated rice. Thus, this study aimed to characterize the morphological diversity of weedy rice in Southern Brazil. Qualitative and quantitative traits of 249 accessions from eight rice growing mesoregions in Rio Grande do Sul (RS) and Santa Catarina (SC) states were analyzed. For each accession, 24 morphological descriptors (14 qualitative and 10 quantitative) were evaluated. All the 249 accessions from RS and SC are of indica lineage. Considering all the phenotypic traits evaluated, the accessions separated into 14 distinct groups. One of the largest groups consisted of plants that were predominantly tall and with green leaves, intermediate shattering, and variable in flowering time. Distinct subgroups exist within larger clusters, showing discernable phenotypic diversity within the main clusters. The variability in flowering time was high (77 to 110 d after emergence), indicating high potential for flowering synchrony with rice cultivars and, consequently, gene flow. This indicates the need to remove escapes when planting herbicide-resistant rice. Thus, weedy rice populations in Southern Brazil are highly diverse and this diversity could result in variable response to weed management.
653 $acluster analysis
653 $amorphological characterization
653 $aphenological diversity
653 $aplant traits
653 $ared rice
700 1 $aNOLDIN, J. A.
700 1 $aBURGOS, N. R.
700 1 $aVIANA, V. E.
700 1 $aBENEDETTI, L.
700 1 $aPINTO, J. J. O.
700 1 $aLAMEGO, F. P.
700 1 $aAVILA, L. A.
773 $tWeed Science, Cambridge, UK$gv.69 , n.2 , p. 1-37, 2021.
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Epagri-Sede (Epagri-Sede) |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
30/06/2009 |
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Data da última atualização: |
12/07/2011 |
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Tipo da produção científica: |
Organização/Edição de Livros |
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Circulação/Nível: |
-- - -- |
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Autoria: |
DIAS, M. A. F. S. (Ed.). |
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Afiliação: |
Epagri |
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Título: |
As chuvas de novembro de 2008 em Santa Catarina: um estudo de caso visando a melhoria do monitoramento e da previsao de eventos extremos. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Sao Paulo: Cptec, 2008. |
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Páginas: |
67 p. |
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Idioma: |
Português |
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Conteúdo: |
Relata a tragédia ambiental devido as chuvas excessivas ocorridas em Santa Catarina em decorrencia das chuvas de novembro de 2008, e contem um estudo de caso que visa à melhoria do monitoramento e previsão para as ocasiões de eventos extremos. Discorre sobre as chuvas ocorridas na ocasião, que totalizaram mais de 1.000 mm, em apenas 3 dias em algumas localidades da região do Vale do Itajaí - SC, decorrencia dos efeitos do fenomeno climatica El Nino.
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Palavras-Chave: |
Chuva; Estudo de caso; Monitoramento; Santa Catarina. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00969nam a2200169 a 4500
001 1064677
005 2011-07-12
008 2008 bl uuuu u0uu1 u #d
100 1 $aDIAS, M. A. F. S. (Ed.).
245 $aAs chuvas de novembro de 2008 em Santa Catarina$bum estudo de caso visando a melhoria do monitoramento e da previsao de eventos extremos.
260 $aSao Paulo: Cptec$c2008
300 $a67 p.
520 $aRelata a tragédia ambiental devido as chuvas excessivas ocorridas em Santa Catarina em decorrencia das chuvas de novembro de 2008, e contem um estudo de caso que visa à melhoria do monitoramento e previsão para as ocasiões de eventos extremos. Discorre sobre as chuvas ocorridas na ocasião, que totalizaram mais de 1.000 mm, em apenas 3 dias em algumas localidades da região do Vale do Itajaí - SC, decorrencia dos efeitos do fenomeno climatica El Nino.
653 $aChuva
653 $aEstudo de caso
653 $aMonitoramento
653 $aSanta Catarina
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