Applications of in vitro culture systems for commercial sugarcane production and improvement

Snyman, S. J.; Meyer, G. M.; Koch, A.; Banasiak, M.; Watt, M. P.

doi:10.1007/s11627-011-9354-7

Cited by 45 publications

(32 citation statements)

References 94 publications

(165 reference statements)

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“…Use of somaclonal variation that results from either in vitro culture or mutagenic treatments is one of the ways of diversifying the genetic pool and potentially introducing desirable traits (Snyman et al, 2011). The term "somaclonal variation" is used to describe any kind of genetic or epigenetic variation detected in plants derived from cell cultures, irrespective of the morphogenic route or explant used (Lal et al, 2014;Larkin and Scowcroft, 1981).…”

Section: Somaclonal Variation For Sugarcane Improvementmentioning

confidence: 99%

Sugarcane in vitro culture technology: Opportunities for Kenyas sugar industry

Wekesa¹,

Onguso²,

Nyende³

et al. 2015

Afr. J. Biotechnol.

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Sugarcane (Saccharum officinarum L.) is one of the most important crops in Kenya and has wide range of economic importance. The sugar industry contributes up to 15% to the country's agricultural gross domestic product and an estimated 25% of the population depends on the industry for their livelihood. However, the industry has been facing several challenges including declining yields due to use of poor quality planting materials. There is an increasing pressure to enhance the productivity of sugarcane in order to sustain profitable sugar industries in Kenya, while there are several diseases attacking sugarcane and reducing its quality. Seed multiplication of newly released varieties of sugarcane is one of the major constraints in Kenya as it takes 6-7 years to produce sufficient quantity of improved seed material. In vitro culture offers a practical and fast method for mass propagation of disease-free clonal materials. Successful protocols for shoot tip culture, callus culture, embryo culture, virus free plant production and somatic embryogenesis have already been established. Thus, in vitro technology can be used to enhance productivity of sugarcane in Kenya. Despite several advantages of applying micro-propagation technique in sugarcane such as quick multiplication of newly released varieties, rejuvenation of old deteriorated varieties; production of disease free seed; easy transportation of seed material; elimination of viruses; high cane productivity and sugar yield etc., this technique is not gaining popularity up to the desired extent. There are several constraints like the high cost of production and appearance of some variants in micropropagated population among others. The present article describes the status, challenges and opportunities of in vitro technology for the sugar industry in Kenya. Though, some problems have now been resolved to considerable extents which have been described in this review however, some constraints still require intensive research work to be resolved so that a safe and efficient exploitation of this technique can be ensured in sugarcane seed production programmes for enhanced yields and quality.

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Section: Somaclonal Variation For Sugarcane Improvementmentioning

confidence: 99%

Sugarcane in vitro culture technology: Opportunities for Kenyas sugar industry

Wekesa¹,

Onguso²,

Nyende³

et al. 2015

Afr. J. Biotechnol.

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Section: Introductionunclassified

“…é a cultura de maior relevância para a produção de biocombustível em regiões tropicais e subtropicais devido à elevada eficiência de conversão de energia solar em biomassa (Waclawovsky et al, 2010;Snyman et al, 2011). Na atualidade, é também a principal fonte (80%) de açúcar, sendo ainda utilizada para alimentação animal (Snyman et al, 2011). Devido às características biológicas e ampla utilização (Waclawovsky et al, 2010;Snyman et al, 2011) tornou-se a cultura vegetal mais produzida no mundo de acordo com a Organização das Nações…”

Section: Introductionunclassified

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Comparativo de rentabilidade da produção da cana-de-açúcar em sistema de arrendamento e fornecimento em Chavantes/SP

Galindo¹,

Carvalho²

2016

Rev. iPecege

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ResumoO presente estudo tem como objetivo comparar a rentabilidade da produção de cana-deaçúcar através dos sistemas de arrendamento e fornecimento próprio, visando auxiliar o proprietário da terra na tomada de decisão quanto a alternativa mais viável diante da atual situação de mercado. O sistema de fornecimento foi divido em duas modalidades: "cana spot" e "cana esteira". Para a análise financeira, foram utilizados dados da safra de 2014/2015 de fornecedores filiados à uma associação, localizada em Chavantes, região centro-oeste de São Paulo. Projetou-se fluxos de caixa para cada sistema de produção, calculou-se o valor presente líquido [VPL], a taxa interna de retorno [TIR], o payback simples e realizou-se a análise de sensibilidade. Os cálculos indicaram a inviabilidade da produção de cana-de-açúcar em todos os casos, pois apresentaram VPL negativo e TIR inferior à taxa mínima de atratividade [TMA]. No entanto, após a análise de sensibilidade com valores de remuneração mais altos ao produtor, as opções de fornecimento de "cana spot" e arrendamento exibiram resultados otimistas. Deste modo, conclui-se que a produção de cana-de-açúcar é uma atividade inviável para proprietários de terra com pequenas áreas (100 ha, em média) em Chavantes/SP. Porém, considerando a análise de sensibilidade, a modalidade de fornecimento próprio de cana "spot" é a alternativa mais atrativa economicamente, pois o VPL e TIR apresentaram valores mais elevados do que aqueles encontrados no arrendamento. No entanto, a opção de cana "spot" possui elevado risco para o produtor, que fica condicionado à demanda de mercado. Palavras-chave: cana esteira, cana spot, custo de oportunidade, sistemas de produção AbstractThe objective of this study was to compare the sugarcane production profitability by land leasing and by own supply systems, aiming to help landowners choosing the most viable alternative in current market situation. The supply system was divided into two categories: "cana spot" (sugarcane sold during the year crop without a contract) and "cana esteira" (sugarcane sold with a previous contract). For analysis, we used data from sugarcane suppliers (2014/2015 year crop) affiliated to an association located in Chavantes, in the midwest region of São Paulo state. Calculating the cash flows for each production system, the net present value [NPV], internal rate of return [IRR], simple payback and a sensitivity analysis were obtained. The results indicated infeasibility of sugarcane production in all cases, since NPV was negative and IRR value was lower than the minimum rate of attractiveness [MRA]. However, sensitivity analysis simulating higher compensation values to producers revealed that supply of "cana spot" and lease system showed optimistic results. Therefore, it can be concluded that sugarcane production is not a feasible activity for landowners with small areas (100 ha, approximately) in Chavantes/SP. Considering sensibility analysis, the supply system of "cana spot" is the most economically attractive alternative, because NPV ...

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“…Uma maneira de se obter variedades de plantas resistentes a patógenos é por meio da indução de mutações, que pode ser considerada como ferramenta para auxiliar no melhoramento genético de plantas (BHAGWAT & DUNCAN, 1998;MADAMBA et al, 2009;SHARMA et al, 2010;SNYMAN et al, 2011). Através da técnica, cerca de 2250 variedades de plantas foram lançadas nas últimas décadas, incluindo importantes culturas, como arroz, trigo, algodão, canola, girassol, gergelim, toranja e banana, impactando significativamente a área cultivada e a economia mundial (AHLOOWALIA et al, 2004).…”

Section: Introductionunclassified