Participatory on-farm selection of sweetpotato varieties in western Kenya

Ndolo, P.; Mcharo, T.; Carey, Edward E.; Gichuki, S.; Ndinya, Christine; Malinga, J.

doi:10.4314/acsj.v9i1.27623

Cited by 31 publications

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“…In Kenya, systematic multi-environment investigations on quantitative traits of sweet potato yield began in the 1990s as a collaborative project between the Kenya Agricultural Research Institute and the International Potato Center (CIP). Some of the results of this work have been published by Ndolo et al (2001) and Mcharo et al (2001).Investigations using quantitative traits do present great challenges to the breeder. However, with increasing availability of robust statistical packages and high computing power it is now possible to more easily investigate interrelationships among the various yield components.…”

Section: Introductionmentioning

confidence: 97%

Root-yield performance of pre-release sweet potato genotypes in Kenya

Mcharo¹

2013

J. App. Bioscience.

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Objective: The focus of this study was to evaluate the yield and stability of superior sweet potato cultivars for release in Kenya. This is the first attempt to document experimental results that have led to the first and so far only sweet potato variety release in Kenya. Methodology: Ten national performance trials laid out as randomized complete block designs were performed on 14 sweet potato (Ipomoea batatas (L.) Lam.) genotypes in two geographical locations of Kenya. The trials were conducted to select local and introduced genotypes that were high yielding, stable, and tasty. Four experiments involving all the 14 genotypes were carried out in Nairobi while six experiments involving nine of the genotypes were carried out at three sites in Western Kenya. The stability of root yield and palatability test ranking were determined using appropriate statistical tools. Results: Significant (P = 0.05) differences in root yield between genotypes were observed for both locations. Mean root yield was higher in Nairobi (16,760 kg ha -1 ) than in Western Kenya (15,150 kg ha -1 ). The proportion of marketable roots was higher in Nairobi than in Western Kenya. Dry matter content was also higher in Nairobi (29.63%) than in Western Kenya (26.58%). Genotype x environment (G×E) interactions were significant (P = 0.05) in both locations. Conclusion and applications: Recommendations on the suitable varieties for official release are given. KEMB 10 and Mugande were the best performers in both environments. These two varieties contribute to enhancing food security among small scale household farmers in rural Kenya. Since its release in 2000, SPK 004 has contributed to enhancing the availability of the beta carotene micronutrient.

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Section: Introductionmentioning

confidence: 97%

Root-yield performance of pre-release sweet potato genotypes in Kenya

Mcharo¹

2013

J. App. Bioscience.

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“…It is traditionally regarded as a 'poor man's crop as it is consumed by poor households. It gives satisfactory yield under adverse climatic and soil conditions, as well as under low or non-use of external inputs (Carey et al, 1999;Ndolo et al, 2001;Githunguri and Migwa, 2004). The plant is a herbaceous perennial vine having alternate heart-shaped or palmately lobed leaves and medium-sized sympetalous flowers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Orange Fleshed Sweet Potato (Ipomoea batatas L.) Genotypes for Higher Yield and Quality

Rahman¹,

Patwary²,

Barua³

et al. 2013

Agriculturists

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Four orange fleshed sweet potato (OFSP) genotypes viz., CIP 194513.15, CIP 194515.15 The maximum dry matter (29.83%) was obtained in H 6 /07 while the minimum dry matter (17.61%) was obtained in CIP 441132. Among the tested genotypes the highest (approximately) Vitamin A (919.2 µg/100 g RE, FW) was recorded in CIP 440267.2, which had red skin and latex absent flesh and the lowest was (approximately) in H 6 /07 (Vit A 0.0 µg/100 g RE, FW). The results of the present study indicated that CIP 440267.2 is suitable among the OFSP genotypes for cultivation in Bangladesh on the basis of yield and quality mainly carotinous.

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“…Farmer participation in the advanced stages of sweet potato varietal selection has been reported to be successful in Ethiopia, Kenya and Uganda (Shamebo and Belehu 2000;Ndolo et al 2001;Abidin 2004).…”

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Participatory selection of orange-fleshed sweetpotato varieties in north and north-east Côte d’Ivoire

et al. 2017

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Open Agriculture. 2017; 2: 83-90 and measured parameters, was most appreciated and was the farmers' first choice, followed by varieties TIB-440060 and 'Bela bela'. Keywords:Orange-fleshed sweetpotato, on-farm Demonstration, participatory varietal selection, sweetpotato IntroductionSweetpotato is cultivated in all the regions of Côte d'Ivoire for consumption and also as a source of income. It is a dicotyledonous plant called Ipomoea batatas (Lam.) that belongs to the family Convolvulaceae, and a tuberous root crop important for food security (Ermias et al. 2013). Globally it is among the important food crops in the world, after wheat, rice, maize, Irish potato, and barley and it ranks second following Irish potato in the world's root and tuber crops production and third after Irish potato and cassava in consumption in several parts of tropical Africa (Teshome et al. 2012). Sweetpotato is also a good source of calcium, ascorbic acid (vitamin C) and beta carotene (provitamin A). Varieties with orange flesh contain particularly high levels of beta carotene which is converted to vitamin A in the human body (Sakamoto et al. 1987); while there is moderate amount of beta carotene in yellow-fleshed and none in white-fleshed varieties (ACIAR, 2010 andStathers et al. 2013). Vitamin A is involved in building the body's immune system to defend against disease and blindness (WHO, 2014). According to the World Health Organization (WHO), vitamin A deficiency (VAD), which is associated with low consumption of products rich in vitamin A is common and is a serious health problem in many developing countries (including Côte d'Ivoire). According to FAO (2009) (OFSP) is hampered by the lack of genetic resources and planting material. To evaluate and release OFSP varieties, on-farm demonstration tests were conducted with women farmer groups in Bondoukou, Nassian, Korhogo and Bondiali in the north and northeast Côte d'Ivoire. Six varieties-'Kabode', 'Kakamega7' ('Irene'), 'Tacha', 'Bela Bela', 'Vita' and TIB-440060-were evaluated in comparison with locally grown varieties. The on-farm demonstration was laid out in a randomised complete block design with replicated three times per location. Assessments were made on yield, disease and pests; and consumer preference on attractiveness of skin color and flesh of the root (fresh and boiled), taste, texture and starchiness. Results showed that introduced varieties have generally recorded higher yields than the local varieties: Yields of about 25 t/ha have been recorded on the sites. The best average yield of about 15 t/ha, was recorded for TIB-440060 and 'Irene' varieties. Farmers' acceptance of OFSP varieties based on the attraction of their color, the dry matter content and taste was more than 90%. At the end of the sensory tests, 'Irene', which achieved the best compromise between all observed

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Participatory on-farm selection of sweetpotato varieties in western Kenya

Cited by 31 publications

References 0 publications

Root-yield performance of pre-release sweet potato genotypes in Kenya

Root-yield performance of pre-release sweet potato genotypes in Kenya

Evaluation of Orange Fleshed Sweet Potato (Ipomoea batatas L.) Genotypes for Higher Yield and Quality

Participatory selection of orange-fleshed sweetpotato varieties in north and north-east Côte d’Ivoire

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