Seed Yam Multiplication by the Mini-sett Technique in Three Yam Species in a Tropical Guinea Savanna Location

Kalu, B. A.; Norman, J.C.; Pal, U. R.; Adedzwa, D. K.

doi:10.1017/s0014479700016689

Cited by 13 publications

(18 citation statements)

References 2 publications

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“…The YMT in particular has been promoted since the early 1980s in Nigeria. YMT uses minisetts of between 10 to 80g in size, although the recommended weight in Nigeria was initially set at 25g as a compromise between competing requirements of maximising setts from a single tuber and the need for a reasonable proportion of seed yams in the yield (Kalu et al , 1989), although larger minisett sizes than 25g would be better in terms of sett survival (George, 1990). Following cutting of mother tubers into minisetts the YMT recommendation was for farmers to allow the cut surface to ‘cure’ (dry and harden) in a warm but humid location (Onwueme and Charles, 1994; Otoo, 1992).…”

Section: Introductionmentioning

confidence: 99%

THE ADAPTED YAM MINISETT TECHNIQUE FOR PRODUCING CLEAN SEED YAMS (DIOSCOREA ROTUNDATA): AGRONOMIC PERFORMANCE AND VARIETAL DIFFERENCES UNDER FARMER-MANAGED CONDITIONS IN NIGERIA

Morse

McNamara²

2014

Ex. Agric.

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Section: Introductionmentioning

confidence: 99%

THE ADAPTED YAM MINISETT TECHNIQUE FOR PRODUCING CLEAN SEED YAMS (DIOSCOREA ROTUNDATA): AGRONOMIC PERFORMANCE AND VARIETAL DIFFERENCES UNDER FARMER-MANAGED CONDITIONS IN NIGERIA

Morse

McNamara²

2014

Ex. Agric.

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“…YMT uses ' mother' yams of 500-1000 g to generate the minisetts by careful cutting. Minisett size can vary from 10 to 80 g, but the recommended weight in Nigeria was 25 g (Kalu et al 1989). One 500-1000 g mother yam should yield c. 20-40 minisetts of 25 g and thus in theory YMT could increase the multiplication ratio in yam tuber production from 1: 8 to 1 : 30 and reduce the cost of production.…”

Section: Introductionmentioning

confidence: 99%

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Morse

McNamara²,

Acholo³

2009

J. Agric. Sci.

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SummaryYam minisett technique (YMT) has been promoted throughout West Africa since the 1980s as a sustainable means of producing clean seed yam, but adoption of the technique is often reported as being patchy at best. While there has been much research on the factors which influence adoption of the technique there have been no attempts to assess its economic viability under 'farmer managed' as distinct from 'on station' conditions. This paper Results suggest that while chemical sett treatment increased yield and hence gross margin compared with woodash, but if household labour is costed then YMT is not economically viable. However, the specialist yam growers of Edeke were far more positive about the use of YMT as they tended to keep the yam seeds for planting rather than sell them. Thus great care needs to be taken with planning adoption surveys on the assumption that all farmers should adopt a technology.

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“…2 Traditional storage of seed tubers produced by the 'Anambra' System Fig. 3 Large setts used as seed to produce ware plus seed yam recommendation was meant to be a compromise between the competing requirements of maximising setts from a single tuber and the need for a reasonable proportion of seed yams in the yield (Kalu et al 1989), although others have pointed out that larger minisett sizes than 25 g would be better (George 1990). …”

Section: Modern Methods Of Seed Yam Productionmentioning

confidence: 99%

Improved propagation methods to raise the productivity of yam (Dioscorea rotundata Poir.)

et al. 2015

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White Guinea yam (Dioscorea rotundata Poir.) is an important staple to millions of people in West Africa. Obtaining good quality planting material for yam cultivation is a major challenge. Multiplication ratios are low, and seed tubers are prone to contamination with pests and pathogens in the traditional systems of production. Some approaches to producing quality seed of yam are as follows: farmers select small whole tubers from a ware crop harvest; stimulate the production of seed tubers by 'milking' ware tubers while the leaves of the plant are still green (double harvest system); cut ware tubers into setts about the same sizes as regular seed tubers; or use the 'Anambra' system where smaller setts are cut and used to produce seed tubers. New methods that have been developed to address some of the challenges of quantity and quality of seed tubers are not yet widely applied, so farmers continue to use traditional methods and save seed from a previous harvest to plant the ware crop. This document presents an overview of traditional and modern methods of seed yam production and gives a perspective for the future. Among the modern methods of seed yam production, only the minisett technique, which uses 25-100 g tuber pieces, is currently used at farmer level, although on a limited scale. While tissue and organ culture techniques are the most rapid methods of multiplying disease free propagules, their limitations include high costs, need for skilled personnel and specialized equipment. The aeroponics and temporary immersion bioreactor methods of producing seed yam are relatively new, and still need more research. To build and sustain a viable seed yam production system, a multiplication scheme is required that combines two or more methods including tissue culture for cleaning the seed stock.

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Seed Yam Multiplication by the Mini-sett Technique in Three Yam Species in a Tropical Guinea Savanna Location

Cited by 13 publications

References 2 publications

THE ADAPTED YAM MINISETT TECHNIQUE FOR PRODUCING CLEAN SEED YAMS (DIOSCOREA ROTUNDATA): AGRONOMIC PERFORMANCE AND VARIETAL DIFFERENCES UNDER FARMER-MANAGED CONDITIONS IN NIGERIA

THE ADAPTED YAM MINISETT TECHNIQUE FOR PRODUCING CLEAN SEED YAMS (DIOSCOREA ROTUNDATA): AGRONOMIC PERFORMANCE AND VARIETAL DIFFERENCES UNDER FARMER-MANAGED CONDITIONS IN NIGERIA

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Improved propagation methods to raise the productivity of yam (Dioscorea rotundata Poir.)

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