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Browsing by Autor "J. Gabriel et al"

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    Agronomic biofortificación in two native potato cultivars (Solanum tuberosum L.)
    (2016) J. Gabriel et al
    During the 2012-2013 cropping season in the areas of Coacollo, Yana Muyu (La Paz, Bolivia) and El Paso (Cochabamba, Bolivia), plots were established in a randomized complete block design in stripe plot arrangement with four replications (experiments in series), in order to: a) determine the response of two potato native crops at Fe and Zn soil fertilization and b) determine the concentration of Fe and Zn in tubers. Two factors were considered: A) two cultivars and B) sixteen levels of Fe and Zn. The response variables were: yield (t.ha-1) and the Fe and Zn content (mg.100g-1 FW) in tubers. The Fe and Zn content were quantified with atomic absorption technique. Result showed that yield for Waych'a (25-35 t.ha-1) and Pinta Boca (8-15 t.ha-1) are affected by the environment. There was significance for Fe*locality interaction and for Zn. The optimum level for Fe in El Paso was 10 kg.ha-1 of ferrous sulphate in order to achieve 15 t.ha-1 and for Zn in the three localities was 9.71 kg.ha-1 Zn sulphate to achieve 16 t.ha-1. In Fe content in tubers was significant for cropping. Boca Pinta (0.60 mg.100 g-1) was higher in 22% compared to Waych'a (0.49 mg.100 g-1). There was no crop*location interaction. However, for Zn there were significances for location, crop and levels. Pinta Boca had higher Zn content (0.30 mg/100 g-1) than Waych'a (0.26 mg.100 g-1).
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    Solanum x curtilobum Juz. et Buk.: papa amarga cultivada con potencial para el mejoramiento genético
    (2016) J. Gabriel et al
    Poco se conoce de la variabilidad intraespecífica de la especie Solanum x curtilobum, de ahí que en el presente estudio se evaluó la fertilidad del polen, la viabilidad de la semilla sexual y la generación de variación genética y morfológica en materiales provenientes de semilla sexual de papa (SSP) de polinización libre de dos cultivares de papa amarga de la especie pentaploide S. x curtilobum (Laram y Janq’u Ch’uqipitu) y una papa dulce tetraploide S.tuberosum ssp. andigena (Waych’a) como testigo. Los resultados mostraron porcentajes de germinación entre 61 a 68%, demostrando la fertilidad del polen de los materiales evaluados. Así mismo, las plantas mostraron variación en el hábito de crecimiento, color de la flor, color de la piel del tubérculo, color de la pulpa del tubérculo, número y profundidad de ojos y forma de tubérculo. La ploidía fue variable, encontrándose progenies triploides, tetraploides y pentaploides en las familias evaluadas. Se observó rendimiento por planta individual de 398.1 g ±428.9 y 558.9 g ±583.4 en progenies de Janq’u y Laram Ch’uqipitu respectivamente. La diversidad genética generada mediante SSP fue oportuna para la selección de genotipos para ampliar la diversidad genética.Aceptado para publicación: 21 de marzo, 2013.

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