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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
14/04/1999 |
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Data da última atualização: |
14/04/1999 |
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Autoria: |
GILLEN, R. L.; SMITH, E. L. |
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Afiliação: |
Assistant professor, Department of Agronomy, Oklahoma State University, Stillwater and associate professor, School of Renewable Natural Resources, University of arizona, Tucson. |
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Título: |
Evaluation of the dry-weight-rank method for determining species composition in tallgrass prairie. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Journal of Range Management, v.39, n.3, p.283-285, May 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
The dry-weight-rank (DWR) method for determining species composition of tallgrass prairie vegetation was compared to hand clipping. Species composition estimates for the 2 methods were similar in 3 of 4 trials when true ranking and previously published multipliers were used. Weighting the DWR estimates by plot total weight did not consistently improve the accuracy of the method. Observer errors reduced the accuracy of DWR, emphasizing the need for observer training. DWR estimates were generally less precise than hand clipped estimates for a given sample size but the speed of DWR would allow more samples to be taken resulting in more precise estimates in practice. |
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Palavras-Chave: |
Composicao; Composition; Dry-weight-rank; Tallgrass prairie. |
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Thesagro: |
Grama; Vegetação. |
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Thesaurus Nal: |
vegetation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01280naa a2200217 a 4500
001 1795212
005 1999-04-14
008 1986 bl --- 0-- u #d
100 1 $aGILLEN, R. L.
245 $aEvaluation of the dry-weight-rank method for determining species composition in tallgrass prairie.
260 $c1986
520 $aThe dry-weight-rank (DWR) method for determining species composition of tallgrass prairie vegetation was compared to hand clipping. Species composition estimates for the 2 methods were similar in 3 of 4 trials when true ranking and previously published multipliers were used. Weighting the DWR estimates by plot total weight did not consistently improve the accuracy of the method. Observer errors reduced the accuracy of DWR, emphasizing the need for observer training. DWR estimates were generally less precise than hand clipped estimates for a given sample size but the speed of DWR would allow more samples to be taken resulting in more precise estimates in practice.
650 $avegetation
650 $aGrama
650 $aVegetação
653 $aComposicao
653 $aComposition
653 $aDry-weight-rank
653 $aTallgrass prairie
700 1 $aSMITH, E. L.
773 $tJournal of Range Management$gv.39, n.3, p.283-285, May 1986.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Origem |
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Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
01/02/2011 |
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Data da última atualização: |
19/05/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CUNHA, F.; GOMEZ, D. R. S.; SILVA, J. J. da; ALEXANDRE, T. M.; MOSCARDI, F. |
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Afiliação: |
FABIANE CUNHA, UFPR; DANIEL RICARDO SOSA GOMEZ, CNPSO; JOSE JAIRO DA SILVA, CNPSO; TALITA M. ALEXANDRE, UFPR; FLÁVIO MOSCARDI, UEL. |
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Título: |
Genetic diversity of the sunflower caterpillar (Chlosyne lacinia saundersii Doubleday and Hewitson) ( Lepidoptera: Nymphalidae) populations determined by molecular RAPD markers. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 82, n. 4, p. 1127-1136, 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Chlosyne lacinia saundersii is one of the most important pests of sunflower and it is the main target of insecticides applications. Larvae were collected in Londrina (PR), Santa Maria (RS), Dourados (MS), Ribeirão Preto (SP), Brasília (DF), Barreiras (BA), Uberaba (MG) and Vilhena (RO). Genomic DNA was extracted and amplified with ten-mer primers, which produced 101 loci. The size of the RAPD amplicons ranged from 180 to 2564 bp. Polymorphism among populations ranged from 31% to 67%, with the highest polymorphisms of 57% and 67% being detected in Uberaba and Vilhena populations, respectively. Populations with the highest similarity determined with Dice coefficient were from Ribeirão Preto and Barreiras, while insects from Londrina showed the highest similarity among them. Gene flow of C. lacinia saundersii 1.1 was lower than those previously observed for the noctuid Anticarsia gemmatalis Hübner, suggesting that C. lacinia saundersii populations are more isolated than the ones of this noctuid. Through the Analysis of Molecular Variance (AMOVA), RAPD variance was 33.64% among geographical populations and 66.36% within populations. These results suggest that populations of C. lacinia saundersii are genetically structured. |
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Palavras-Chave: |
Sunflower. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/30163/1/Fabiane-Anais-da-Academia-Brasileira-de-Ciencias.pdf
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Marc: |
LEADER 01882naa a2200181 a 4500
001 1875250
005 2017-05-19
008 2010 bl uuuu u00u1 u #d
100 1 $aCUNHA, F.
245 $aGenetic diversity of the sunflower caterpillar (Chlosyne lacinia saundersii Doubleday and Hewitson) ( Lepidoptera$bNymphalidae) populations determined by molecular RAPD markers.
260 $c2010
520 $aChlosyne lacinia saundersii is one of the most important pests of sunflower and it is the main target of insecticides applications. Larvae were collected in Londrina (PR), Santa Maria (RS), Dourados (MS), Ribeirão Preto (SP), Brasília (DF), Barreiras (BA), Uberaba (MG) and Vilhena (RO). Genomic DNA was extracted and amplified with ten-mer primers, which produced 101 loci. The size of the RAPD amplicons ranged from 180 to 2564 bp. Polymorphism among populations ranged from 31% to 67%, with the highest polymorphisms of 57% and 67% being detected in Uberaba and Vilhena populations, respectively. Populations with the highest similarity determined with Dice coefficient were from Ribeirão Preto and Barreiras, while insects from Londrina showed the highest similarity among them. Gene flow of C. lacinia saundersii 1.1 was lower than those previously observed for the noctuid Anticarsia gemmatalis Hübner, suggesting that C. lacinia saundersii populations are more isolated than the ones of this noctuid. Through the Analysis of Molecular Variance (AMOVA), RAPD variance was 33.64% among geographical populations and 66.36% within populations. These results suggest that populations of C. lacinia saundersii are genetically structured.
653 $aSunflower
700 1 $aGOMEZ, D. R. S.
700 1 $aSILVA, J. J. da
700 1 $aALEXANDRE, T. M.
700 1 $aMOSCARDI, F.
773 $tAnais da Academia Brasileira de Ciências, Rio de Janeiro$gv. 82, n. 4, p. 1127-1136, 2010.
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Registro original: |
Embrapa Soja (CNPSO) |
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