EFECTOS DEL "RAYADO MARRON" DE LA YUCA SOBRE EL RENDIMIENTO Y ALGUNAS PROPIEDADES FISICAS DEL ALMIDO NATIVO

Sonia Castroni and Eckbert Schulz

No 261448, 21st Annual Meeting, September 8-13, 1985, Port of Spain, Trinidad and Tobago from Caribbean Food Crops Society

Abstract: Se seleccionaron clones de yuca susceptibles y tolerantes al rayado marrón. Sus rafees se almacenaron al ambiente (25-30"c; 40-55% HR) y en refrigeración (S-6°C; 80-90% HR) durante 72 y 144 horas. Se determinó el rendimento de almidón en la pulpa fresca. Se caracterizó los almidones mediante su capacidad de hinchamiento, la solubilidad. y la amilografiá en suspensiones acuosas. Mediante observaciones visuales y una documentacid'n fotográfica del avance del deterioro se seleccionaron los clones ·ucv 2459' y ·ucv 2129' como muy susceptibles y los clones ·ucv 2320' y ·ucv 2277' como muy tolerantes al rayado marr6n. Hubo influencia del tiempo y tipo de almacenamiento sobre los rendimientos del almid6n, su hinchamiento, solubilidad, temperatura de empaste y conducta amilogr(fia. El almacenamiento de las raíces modificó progresivamente las curvas ele viscosidad. ----- Cassava clones were selected for their susceptible and tolerant symptoms to the physiological disorder called "Vascular streaking". Their roots were stored at room temperature (25"c - 30"c, 40% - 55% RH) and at 5"c 6° C, 80% -- 90% RH for 72 and 144 hours. The length and type of storage influenced the starch yields and solubility and swelling properties of fresh roots. Also there were changes in the starch. Paste - viscosity in aqueous suspension was registered by an arnylograph - Branbender. Through visual observations and a series of photographs 'UCV 2459' and 'ucv 2129' clones were c1assifed as very susceptible and 'ucv 2320' and 'ucv 2277' as tolerant to vascular streaking.

Keywords: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies (search for similar items in EconPapers)
Pages: 13
Date: 1985-09-08
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Persistent link: https://EconPapers.repec.org/RePEc:ags:cfcs85:261448

DOI: 10.22004/ag.econ.261448

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