Seed Potato Quality Improvement through Positive Selection by Smallholder Farmers in Kenya

Gildemacher, Peter; Schulte-Geldermann, Elmar; Borus, Dinah; Demo, P.; Kinyae, P.; Mundia, Pauline Wangui; Struik, P.C.

doi:10.1007/s11540-011-9190-5

Cited by 91 publications

(89 citation statements)

References 10 publications

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“…As such, the technology may become effective notwithstanding the variation in circumstances. The effectiveness of positive selection in giving higher yields was observed in potato plots by Peter et al [20]. They noted that positive selection plots gave an average yield of 14.2 t/ha which was significantly higher than the 11.8 t/ha for the farmer seed selection plots (no selection).…”

Section: Discussionmentioning

confidence: 87%

The Response of White Yam (Dioscorea rotundata Poir) Tuber Portions to Positive Selection for Quality Seed Yam Production

Aihebhoria¹,

Aighewi²,

Balogun³

2017

Adv Crop Sci Tech

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The production of yams is constrained by high cost and unavailability of clean planting materials, pests and diseases. Vegetative propagation has also caused a build of up diseases, reported to cause up to 80% yield reduction due to scarcity of quality declared seeds. Planting of disease-free material has been found to be effective in reducing disease problems in plants. This study was conducted to produce clean seed yam by reducing yam diseases through positive selection method. In this method, apparently healthy yam plants were identified, tagged (positive selection), assessed for yam mosaic virus incidence and severity using the scale 0 or 1 and 1-5 respectively. The harvested clean tubers from tagged plants were planted the following season so as to determine the rate of response of each genotype and tuber portion to positive selection. At the end of two cycles of positive selection, analysis of variance for percentage number of positive yam plants, YMV incidence, YMV severity and tuber yield shows significant difference (p ≤ 0.05) between positive selection and no selection for both field and screen house plants. It was observed that positively selected plants performed significantly (p ≤ 0.05) better than no selection plants. For field experiment, Number of positively selected plants was highest in positive TDr89/02665 with mean value of 75.00% while no selection Ogoja had the least number of positive plants (17.8%). A yield increase of 1.80 t/ha was recorded due to the application of positive selection method in two cycles. For screen house experiment, result followed a similar trend; however with a reduction in YMV incidence and severity. It is worthy to note that tail portions of yam were lest infected with YMV, hence more healthy plants were selected from the tail portion.

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Section: Discussionmentioning

confidence: 87%

The Response of White Yam (Dioscorea rotundata Poir) Tuber Portions to Positive Selection for Quality Seed Yam Production

Aihebhoria¹,

Aighewi²,

Balogun³

2017

Adv Crop Sci Tech

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“…Periodic renewal of seed potato by farmers from informal sources mainly neighbours and local markets have been also reported in previous studies [6,10]. Due to ease of access, most farmers in Kenya use informal channels in seed renewal and with limited availability of certified seed, few farmers in Kenya renew seed [18]. Growth of local landraces for over 35 years without clean up for diseases also suggests no seed renewal by farmers [9].…”

Section: Seed Potato Production Practices By Small-scale Farmersmentioning

confidence: 65%

“…Lack of adequate knowledge on recommended potato production practices is a major problem facing farmers [18,19]. To mitigate the problems associated with limited supply of certified seed potato, positive selection technique was developed to enhance production of quality seed at the farm level but few farmers have adopted this technology [18,20]. Farmers' knowledge on potato diseases, pests and their management is important in potato production [19].…”

Section: World Journal Of Agricultural Researchmentioning

confidence: 99%

Seed Potato Production Practices and Quality of Farm Saved Seed Potato in Kiambu and Nyandarua Counties in Kenya

Mumia¹,

Muthomi²,

Narla³

et al. 2018

WJAR

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Potato production in Kenya is mainly constrained by limited supply of quality seed potato tubers. The objective of this study was to determine seed potato handling practices and quality of farm saved seed potato. A survey involving 79 farmers was conducted in potato production areas in Kiambu and Nyandarua Counties to collect information on seed potato production practices including sources of seed tubers, seed selection, seed tuber storage, pests and diseases. Samples of seed potato were collected from farmers and evaluated for quality parameters such as tuber size, weight, stout sprout length and infection with diseases. Factors affecting potato production included limited quality seed supply, pests and diseases. Shangi was the main potato variety grown by majority (62.8%) of farmers and all the farmers used own farm saved seed. Most (45.5%) farmers recycled the seed for four seasons and 44.1% of farmers stored seed potato for three months. Freeness from seedborne diseases was the main seed quality preference by farmers. The main pest reported was cutworms (42.6% of farmers) while potato late blight and bacterial wilt were the major diseases reported by 87.1% and 86.7% of the farmers respectively. All farm saved seed potato samples were infected with Fusarium coeruleum, 51.2% with Rhizoctonia solani, 53.3% with Fusarium sambunicum, 33.3% with Fusarium solani and 48.3% with Aspergillus niger. Over 69% of the farm saved seed samples were infected with Ralstonia solanacearum while 40.1% were infected with Potato Virus S, the most dominant. Due to poor post-harvest handling practices, farmers incurred seed quality and quantity losses in storage. Farm saved seed is contaminated with multiple seed borne diseases. Farmers should be sensitized on appropriate seed potato handling practices and there should be increased supply of certified seed potato.

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“…Selecting seed potatoes from healthy-looking mother plants (positive selection) assures lower incidences of PLRV (39%), PVY (35%) and PVX (35%). Positive selection out-yielded farmer selection by 30% irrespective of the agro-ecology, crop management, soil fertility, variety and quality of the starter seed, which may benefit all smallholder potato producers who select seed potatoes at same stage from their own fields, and thus could be incorporated routinely in agricultural extension efforts (Gildemacher et al, 2011;Schulte-Geldermann et al, 2012).…”

Section: Shaheb Et Al /The Agriculturists 13(1): 173-188 (2015)mentioning

confidence: 99%

Challenges of Seed Potato (<i>Solanum tuberosum</i> L.) Production and Supply System in Bangladesh - A Review

Shaheb

Begum²,

Ahmed³

et al. 2016

Agriculturists

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Potato (Solanum tuberosum L.) is an important vegetable that plays a vital role in global food and nutritional security and alleviation of poverty, especially in Bangladesh. Although, the soil and climatic conditions of Bangladesh are favourable for potato cultivation, every year production is hampered due to use of low quality seeds. Seed potato industry is developing in Bangladesh. However, only 5-10% quality seeds are being produced and used by the potato farmers. Quality seeds alone can contribute to increased yield by 15-20%. Both public and private sectors together supply only 5% quality seed potato and the rest 95% is almost of low quality produced by the farmers themselves. In prioritizing different issues of agriculture, challenges of production and supply of quality seed to the farmers should be considered as a top priority issue. For increasing quality seeds, the whole seed system needs to be reviewed. The present work was an attempt to review the seed potato production systems, supply system and also to identify the possible challenges and policy implications in regards of the problems on seed potato in Bangladesh.

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Seed Potato Quality Improvement through Positive Selection by Smallholder Farmers in Kenya

Cited by 91 publications

References 10 publications

The Response of White Yam (Dioscorea rotundata Poir) Tuber Portions to Positive Selection for Quality Seed Yam Production

The Response of White Yam (Dioscorea rotundata Poir) Tuber Portions to Positive Selection for Quality Seed Yam Production

Seed Potato Production Practices and Quality of Farm Saved Seed Potato in Kiambu and Nyandarua Counties in Kenya

Challenges of Seed Potato (<i>Solanum tuberosum</i> L.) Production and Supply System in Bangladesh - A Review

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