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Research & Reviews : Journal of Agricultural Science and Technology

Performance evaluation of improved White-Fleshed Sweet Potatoes (Ipomoea batatas (L.) Lam.) Varieties for yield and yield-related traits in South Western Ethiopia.

  1. Wondimu Yonas
  2. Fikadu Ejigu
  3. Andualem Gadisa

Abstract

Sweet potato (Ipomoea batatas (L.) Lam.) is one of the most important root and tuber crop that rich invitamins, starch, protein, and the carbohydrate of sweet potato was easily soluble with in short period of time.To break the food security problem several sweet potato technologies have been introduced and evaluated indifferent areas of the country. Still, adaptation and performances of improved white-fleshed sweet potatovarieties were not yet assessed in the southwest region. Since this research project was initiated to evaluatethe adaptability of improved white-fleshed sweet potato varieties based on their yield performance and testpreference in southwest Ethiopia. Across three locations, six improved white-fleshed sweet potato (Ipomoeabatatas L.) varieties namely: Awassa-83, Temesgen, Beletech, Belela, Kudade, Wondogenet with one localvariety were evaluated by using a randomized complete block design with three replications for two seasons.Analysis of all collected data were done by using the R software, and quality preference of seven varietieswere evaluated by using five testpreference parameters. Combined analysis of variance indicated that themain effects due to environments, and Varieties were highly significant on tuberous root yield. Thecontribution of Environments and Varieties to the total variation in tuber yield was about 65 % and 6.3 %,independently. Over all environments, Awassa 83 variety gives best yield (46.1 t ha -1 ). In addition, there was asignificant difference between the varieties in test preference, the best test preference was observed fromvariety Awassa-83 which also gave significantly the highest storage total root yield. Since, the varietyAwassa-83 was recommended for production under the rain-fed condition of Southwest Ethiopia in theGimbo, Yeki, and Gura-Ferda districts.

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