Revaluation of landraces potatoes from Bolivia (Solanum tuberosum L.) as a source of iron and zinc

Abstract

In 19 communities’ farmer fields from Northern Potosi, La Paz and Cochabamba, 144 landraces potato were collected in the years 2012 and 2013, with the aim to determining the iron and zinc content in tubers. The content analysis of iron and zinc were performed in the Institute Food Technology (I.TA.) lab of the Royal and Pontifical San Francisco Xavier of Chuquisaca University, by using the technique of atomic absorption (AA). The results showed that species with higher content of iron and zinc were Solanum x ajanhuiri (2n = 2x = 24), S. Solanum goniocalyx (2n = 2x = 24) and S. stenotomum (2n = 2x = 24). However, the average analysis showed that cultivars with higher iron content were Sakampaya (ADG) con 14.50 mg.kg-1, Wila Surimana (STN) with 13.50 mg.kg-1, Khati Señorita (STN) with 12.10 mg.kg-1, Chilltu (STN) with 11.80 mg.kg-1, Imilla Negra (ADG) with 10.90 mg.kg-1, Yuraj Sak’ampaya (ADG) with 10.90 mg.kg-1, Sak’ampaya (ADG) with 10.80 mg.kg-1 and Pinta Boca (STN) with 9.80 mg.kg-1. For zinc content, the highest content were in cultivars Yuraj Sak’ampaya (ADG) with 5.20 mg.kg-1, Kellu Zapallo (GON) with 4.80 mg.kg-1, Ajawiri (AJH) with 9.00 mg.kg-1, Pepino (STN) with 4.50 mg.kg-1, Candelero (STN) with 4.50 mg.kg-1 and Zapallo (GON) with 4.40 mg.kg-1. Correlation analysis using Pearson's test at Pr<0.05 probability showed a moderate correlation, positive and notable (r = 0.32) between the iron and zinc content for all sites where collections were made.

Keywords

• Species
• micronutrients
• cultivars
• biodiversity
• nutrition