Sugary cassava (Manihot esculenta Crantz): preliminary morphological characterization and agronomic evaluation.
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In addition to the farina and table type of cassava, a new kind of cassava (sugary cassava) was, recently, identified and isolated under cultivation in Amazon. Biochemical and molecular characterization of this sugary storage root phenotype indicates unusual storage root traits, including high free sugar content (mainly glucose) and distinct starch molecule structure in comparison to the conventional cassava cultivated for farina and table harvesting propose (Carvalho et al. 2004). The sugary cassava type was unknown for the scientific community; there is no morphological and agronomic information about it. In complementation to our biochemical and molecular characterization research applied to the sugary cassava, here we present our preliminary morphological characterization and agronomic evaluation for our GENEBANK collection of this type of cassava grown in Amazon region. Sixteen sugary clones were grown in field plots at EMBRAPA-Amazonia Oriental in the Amazon for field evaluation in comparison with farina and table type of cassava. Morphological characterization showed the usual diversity in leaf, petiole, stem, and storage root as in the other types of cassava. No particular morphological characteristic could be used to distinguish sugary cassava from farina or table type of cassava, except the size, weight and density in water of the fresh storage root. Agronomic evaluation indicated a production of storage root fresh weight per plant varying from 2 to 10kg with 10-month growth, and dry weight of 9 to 22%, while the table and farina cassava produced 2-4kgFWt/plant and 30 to 40% dry weight. A new natural glucose syrup product has been developed with yield of about 9 and 7% fresh weight base
Organized by Luiz J. C. B. Carvalho.
Organized by Luiz J. C. B. Carvalho.
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Mandioca, Morfologia Vegetal