scholarly journals Cultivation of minor tuber crops in Peru and Bolivia

1988 ◽  
Vol 60 (2) ◽  
pp. 87-92
Author(s):  
Leena Pietilä ◽  
Paula Jokela
Keyword(s):  
Climatic Variation ◽  
Mountainous Area ◽  
Chemical Fertilizers ◽  
Oxalis Tuberosa ◽  
The Andes ◽  
Animal Dung ◽  
Ullucus Tuberosus ◽  
Andean Tuber Crops ◽  
Full Utilization ◽  
Tuber Crops

A collection mission of three Andean tuber crops, oca (Oxalis tuberosa, Oxalidaceae), ulluco (Ullucus tuberosus, Basellaceae) and añu (Tropaeolum tuberosum, Tropaeolaceae), was carried out in southern Peru, Bolivia and northern Argentina. This article deals with the observations made during this mission. 55 ulluco fields were visited. In general, the fields are small, 240m2 on average, and they are mostly situated on mountain slopes. The fields are fertilized with animal dung; chemical fertilizers are quite rare. In the fields, people work with hoes ang ploughs as they did hundreds of years ago. Mechanization of agriculture would prevent full utilization of the mountainous area of the Andes. Ulluco is usually interplanted with other crops, usually, many forms of ulluco in one field. Because of crop rotation description of the fields is partly valid for the cultivation of other crops, too. Due to drastic climatic variation, cultivation of mixed varieties maybe the best way to guarantee some yield. When results of the investigations are wished to benefit developing countries, knowledge of social, agricultural and environmental factors is of great value.

scholarly journals Other Natural Hosts of Potato virus T

Plant Disease ◽  
2000 ◽  
Vol 84 (7) ◽  
pp. 736-738 ◽  
Author(s):  
C. Lizárraga ◽  
M. Querci ◽  
M. Santa Cruz ◽  
I. Bartolini ◽  
L. F. Salazar
Keyword(s):  
Potato Virus ◽  
Germplasm Bank ◽  
Chain Reaction ◽  
Oxalis Tuberosa ◽  
Pcr Product ◽  
Ullucus Tuberosus ◽  
Natural Hosts ◽  
Polymerase Chain ◽  
Andean Tuber Crops

Potato virus T (PVT), a member of the genus Trichovirus, was isolated from leaves of naturally infected ulluco (Ullucus tuberosus), oca (Oxalis tuberosa), and mashua (Tropaeolum tuberosum). These Andean tuber crops are often grown in small plots in association with potato (Solanum tuberosum) in the Peruvian highlands. PVT isolates from ulluco, oca, mashua, and potato infected virus-free ulluco, oca, and potato genotypes by mechanical inoculation. The incidence of PVT in mashua, oca, and ulluco accessions from the International Potato Center (CIP) in vitro germplasm bank was less than 10%. A polymerase chain reaction (PCR) product of approximately 330 bp was obtained from each of the four isolates using primers designed from the published PVT sequence. Restriction enzyme digestions of the PCR product did not demonstrate variability.

scholarly journals Propiedades funcionales de productos tradicionales congelados y secados al sol de oca (Oxalis tuberosa Molina) y olluco (Ullucus tuberosus Caldas): Una revisión

PURIQ ◽  
2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Roberto Carlos Chuquilín Goicochea ◽  
Mónica Carolim Martínez Laurente ◽  
Jesús Teodoro Rodrigo-Chumbes
Keyword(s):  
Oxalis Tuberosa ◽  
Ullucus Tuberosus

El objetivo fue comprender la importancia de dos tubérculos andinos orgánicos como Oxalis tuberosa Molina y Ullucus tuberosus Caldas, en cuanto a sus componentes benéficos para la salud humana, así como darle un valor agregado mediante una técnica ancestral, llamada comúnmente “chuño”, conocidos como caya y chullce en la región Huancavelica. Se revisaron bases de datos Science direct, Taylor & Francis, Wiley, PubMed, Scielo y Alicia, con una antigüedad de 20 años. Los resultados más relevantes se sistematizaron en tablas y se analizaron para resaltar las cualidades que ambos tubérculos tienen como producto fresco y, las posibilidades que puedan tener al convertirlos en productos agroindustriales que retienen sus propiedades funcionales.

Metagenomic survey of the bacterial communities in the rhizosphere of three Andean tuber crops

Symbiosis ◽  
2019 ◽  
Vol 79 (2) ◽  
pp. 141-150 ◽  
Author(s):  
Eduardo Chica ◽  
Lenys Buela ◽  
Adrián Valdez ◽  
Paulina Villena ◽  
Denisse Peña ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Andean Tuber Crops ◽  
Tuber Crops

Other starches.

2021 ◽  
pp. 159-176
Author(s):  
S. N. Moorthy ◽  
M. S. Sajeev ◽  
R. P. K. Ambrose ◽  
R. J. Anish
Keyword(s):  
Thermal Properties ◽  
Chemical Composition ◽  
X Ray Diffraction ◽  
Oxalis Tuberosa ◽  
Chinese Water ◽  
Water Chestnut ◽  
Granular Morphology ◽  
Amylopectin Structure ◽  
Starch Crystallinity ◽  
Tuber Crops

Abstract This chapter discusses the extraction, physiochemical (chemical composition, amylose and amylopectin content), structural (granular morphology, X-ray diffraction pattern, starch crystallinity, and amylose and amylopectin structure), functional (swelling pattern, solubility, viscosity, rheological properties and retrogradation) and thermal properties, and digestibility of starches from minor tuber crops (e.g., arrowroot, Curcuma spp., Canna edulis [C. indica], Chinese water chestnut [Eleocharis dulcis], chayote [Sechium edule], Pachyrhizus ahipa, Oxalis tuberosa, Arracacia xanthorrhiza, Lilium spp.).

scholarly journals The physical, chemical and functional characterization of starches from Andean tubers: oca (Oxalis tuberosa Molina), olluco (Ullucus tuberosus Caldas) and mashua (Tropaeolum tuberosum Ruiz & Pavón)

2013 ◽  
Vol 49 (3) ◽  
pp. 453-464 ◽  
Author(s):  
Beatriz Valcárcel-Yamani ◽  
Gerby Giovanna Rondán-Sanabria ◽  
Flavio Finardi-Filho
Keyword(s):  
High Stability ◽  
Functional Characterization ◽  
Starch Granules ◽  
Oxalis Tuberosa ◽  
Physical Chemical ◽  
Ullucus Tuberosus ◽  
Starch Gels ◽  
Tropaeolum Tuberosum ◽  
Freezing Storage

The physical, chemical, and functional properties of starches isolated from the Andean tubers oca (Oxalis tuberosa M.), olluco (Ullucus tuberosus C.) and mashua (Tropaeolum tuberosum R. & P.) were studied. The tubers were obtained from a local grocery. The morphology of the starch granules (size and shape) was studied with scanning electron microscopy (SEM), which revealed ellipsoid, oval, conical, pear-shaped and prismatic forms: ellipsoids and oval granules with lengths up to 54.30 µm in oca; with lengths up to 32.09 µm for olluco starch granules; and with predominantly truncated spherical or oval forms and smaller dimensions (up to 16.29 um) for mashua starch granules. Amylose contents were similar among the samples: 27.60% (oca), 26.49% (olluco) and 27.44% (mashua). Olluco starch had less swelling power, forming opaque, less firm gels. All three starch gels showed the same stability on refrigeration and presented high syneresis under freezing temperatures, with a variation of 40.28 to 74.42% for olluco starch. The starches cooked easily, with high peak viscosity. The low gelatinization temperatures and high stability during cooling make these starches suitable feedstock for use in formulations that require milder processing temperatures and dispense freezing storage.

scholarly journals Cultura y conservación in situ de tubérculos andinos marginados en agroecosistemas de Boyacá: un análisis de su persistencia desde la época prehispánica hasta el año 2016

2018 ◽  
Vol 14 (80) ◽  
Author(s):  
Neidy Lorena Clavijo Ponce
Keyword(s):  
Oxalis Tuberosa ◽  
Ullucus Tuberosus ◽  
Estudio De Caso

Con base en una indagación histórica, que tiene como complementada el estudio de caso de dos municipios del departamento de Boyacá, el presente estudio se propone identificar varios elementos culturales relacionados con tres especies andinas marginadas (Oxalis tuberosa Molina), (Tropaelum tuberosum Ruíz & Pavón) y (Ullucus tuberosus Caldas), los cuales surgen desde la época prehispánica y se sostienen hasta elpresente. Según ese marco, las evidencias muestran un sistema de conocimiento que corresponde a las creencias y las valoraciones que se organizan en torno a estas especies. Asimismo, es notorio que dicho esquema ha permanecido constante a lo largo del tiempo, al igual que tecnologías y prácticas de cultivo e intercambio, las cuales han permanecido y no sufrido mayores modificaciones desde la época precolombina,a pesar de la embestida de la revolución verde.

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