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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
14/04/2004 |
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Data da última atualização: |
14/04/2004 |
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Autoria: |
AJONYE, M; LWANGA CHARLES; SSEMAKULA, G; OTIM-NAPE, G.W; BAGUMA, Y. K; OBA, J. R. |
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Título: |
Progress in cassava micropropagation in Uganda. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Revista Brasileira de Mandioca,Cruz das Almas, v.17, p.49, nov, 1998. Suplemento. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Micropropagation (in vitro culture) of some farmer prefered cassava varieties was investigated, inorder to suplement existing multiplication techniques (farme's and rapid multiplication methods). The best medium formulation for initiation and multiplication of the variety SS4 was standard modified Murashige and Skoog's (MS) (1962) medium supplemented with 0.05 mg/l benzyl aminopurine (BAP), 0.01 mg/l naphthyl acetic acid (NAA) and 1 mg/l gibberellic acid (GA). For variety TMS 2 (4) 1425, the same formulation favoured culture initiation, but further multiplication (subculturing) required basic MS medium without growth regulator supplement. Six substrates namely: coffee husks, 100%; top soil, 100%; soil/sawdust mixture, 50:50; and farmyard manure, were tested for plantlet response, for weaning and hardenig. The best growth occured in soil and the worst in coffee husks and dairy manure. The effect of plantlet age at 2,4 and 8 weeks after, was investigated in relation to plant survival. The lowest survival rates occured at two weeks after subculture (SS4, 95% and TMS 2 (4) 1425, 93%). The optimum age for the highest survival was 4 weeks after subculture. Varietal differences significantly (P>0.05) occured at 8 weeks after subculture, with SS4 having 95% better perfomance than TMS 2 (4) 1425, 80%. Successful field establishment occured at MUARIK (100%) and Namulonge (70%). Approximately 7000 plantlets were established in the field within one year. The first generation of plantlets fron MUARIK flowered at 7 months after planting (MAP). one thousand stems were harvested at MAP, from which stakes planted 0.7 ha of land were obtained. Farmers held high opinion of in vitro cassava plantlets. All the selected farmers for the demostration reported 100% survival in preliminary field trials. Initial tecnical and economic comparison of the multiplication techniques (conventional and rapid multiplication techniques) used, by the national cassava program in Uganda was done, against the tissue culture technique. The conventional method required the largest area and starting material. Tissue culture consumed most time, effort and operating capital, overall labour and machinery, compared with the two alternative techniques. Total direct production cost were least for the conventional technique. The tissue culture method had the highest multiplication rate (1:2000) compared to the rapid (1:16) and conventional (1:3) per year. MenosAbstract: Micropropagation (in vitro culture) of some farmer prefered cassava varieties was investigated, inorder to suplement existing multiplication techniques (farme's and rapid multiplication methods). The best medium formulation for initiation and multiplication of the variety SS4 was standard modified Murashige and Skoog's (MS) (1962) medium supplemented with 0.05 mg/l benzyl aminopurine (BAP), 0.01 mg/l naphthyl acetic acid (NAA) and 1 mg/l gibberellic acid (GA). For variety TMS 2 (4) 1425, the same formulation favoured culture initiation, but further multiplication (subculturing) required basic MS medium without growth regulator supplement. Six substrates namely: coffee husks, 100%; top soil, 100%; soil/sawdust mixture, 50:50; and farmyard manure, were tested for plantlet response, for weaning and hardenig. The best growth occured in soil and the worst in coffee husks and dairy manure. The effect of plantlet age at 2,4 and 8 weeks after, was investigated in relation to plant survival. The lowest survival rates occured at two weeks after subculture (SS4, 95% and TMS 2 (4) 1425, 93%). The optimum age for the highest survival was 4 weeks after subculture. Varietal differences significantly (P>0.05) occured at 8 weeks after subculture, with SS4 having 95% better perfomance than TMS 2 (4) 1425, 80%. Successful field establishment occured at MUARIK (100%) and Namulonge (70%). Approximately 7000 plantlets were established in the field within one year. The first generation ... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02957naa a2200181 a 4500
001 1651845
005 2004-04-14
008 1998 bl uuuu u00u1 u #d
100 1 $aAJONYE, M
245 $aProgress in cassava micropropagation in Uganda.
260 $c1998
520 $aAbstract: Micropropagation (in vitro culture) of some farmer prefered cassava varieties was investigated, inorder to suplement existing multiplication techniques (farme's and rapid multiplication methods). The best medium formulation for initiation and multiplication of the variety SS4 was standard modified Murashige and Skoog's (MS) (1962) medium supplemented with 0.05 mg/l benzyl aminopurine (BAP), 0.01 mg/l naphthyl acetic acid (NAA) and 1 mg/l gibberellic acid (GA). For variety TMS 2 (4) 1425, the same formulation favoured culture initiation, but further multiplication (subculturing) required basic MS medium without growth regulator supplement. Six substrates namely: coffee husks, 100%; top soil, 100%; soil/sawdust mixture, 50:50; and farmyard manure, were tested for plantlet response, for weaning and hardenig. The best growth occured in soil and the worst in coffee husks and dairy manure. The effect of plantlet age at 2,4 and 8 weeks after, was investigated in relation to plant survival. The lowest survival rates occured at two weeks after subculture (SS4, 95% and TMS 2 (4) 1425, 93%). The optimum age for the highest survival was 4 weeks after subculture. Varietal differences significantly (P>0.05) occured at 8 weeks after subculture, with SS4 having 95% better perfomance than TMS 2 (4) 1425, 80%. Successful field establishment occured at MUARIK (100%) and Namulonge (70%). Approximately 7000 plantlets were established in the field within one year. The first generation of plantlets fron MUARIK flowered at 7 months after planting (MAP). one thousand stems were harvested at MAP, from which stakes planted 0.7 ha of land were obtained. Farmers held high opinion of in vitro cassava plantlets. All the selected farmers for the demostration reported 100% survival in preliminary field trials. Initial tecnical and economic comparison of the multiplication techniques (conventional and rapid multiplication techniques) used, by the national cassava program in Uganda was done, against the tissue culture technique. The conventional method required the largest area and starting material. Tissue culture consumed most time, effort and operating capital, overall labour and machinery, compared with the two alternative techniques. Total direct production cost were least for the conventional technique. The tissue culture method had the highest multiplication rate (1:2000) compared to the rapid (1:16) and conventional (1:3) per year.
700 1 $aLWANGA CHARLES
700 1 $aSSEMAKULA, G
700 1 $aOTIM-NAPE, G.W
700 1 $aBAGUMA, Y. K
700 1 $aOBA, J. R.
773 $tRevista Brasileira de Mandioca,Cruz das Almas$gv.17, p.49, nov, 1998. Suplemento.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
21/06/2010 |
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Data da última atualização: |
21/06/2010 |
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Autoria: |
CHAVES, L. H. G.; MESQUITA, E. F. de; GUERRA, H. O. C.; ARAÚJO, D. L. de; FRANÇA, C. P. de; LACERDA, R. D. |
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Afiliação: |
Lúcia Helena Garófalo Chaves; Evandro Franklin de Mesquita; Hugo Orlando Carvallo Guerra; Diva Lima de Araújo; Clébia Pereira de França; Rogério Dantas Lacerda. |
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Título: |
Avaliação da fitomassa seca da cultivar brs 188 paraguaçu adubada com nitrogênio, fósforo e potássio. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MAMONA, 4.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 1., 2010, João Pessoa. Inclusão social e energia: anais. Campina Grande: Embrapa Algodão, 2010. |
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Idioma: |
Português |
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Palavras-Chave: |
Fitomassa. |
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Thesagro: |
Adubação; Mamona. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/18382/1/FER-21.pdf
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Marc: |
LEADER 00751naa a2200205 a 4500
001 1855661
005 2010-06-21
008 2010 bl uuuu u00u1 u #d
100 1 $aCHAVES, L. H. G.
245 $aAvaliação da fitomassa seca da cultivar brs 188 paraguaçu adubada com nitrogênio, fósforo e potássio.
260 $c2010
650 $aAdubação
650 $aMamona
653 $aFitomassa
700 1 $aMESQUITA, E. F. de
700 1 $aGUERRA, H. O. C.
700 1 $aARAÚJO, D. L. de
700 1 $aFRANÇA, C. P. de
700 1 $aLACERDA, R. D.
773 $tIn: CONGRESSO BRASILEIRO DE MAMONA, 4.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 1., 2010, João Pessoa. Inclusão social e energia: anais. Campina Grande: Embrapa Algodão, 2010.
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