Sprouting and yield of yam (Dioscorea spp.) minisetts in relation to sett size, soil moisture and agro-ecology

Ayankanmi, Toye; Shiwachi, Hironobu; Asiedu, Robert

doi:10.1002/ts.41

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…Using smaller setts would be more favorable for reducing production costs; however, smaller setts or minisetts are infrequently adopted by farmers owing to low sprouting rates and unstable tuber yields (Emokaro & Law-Ogbomo, 2008;Onemolease & Adisa, 2005). Ayankanmi, Shiwachi and Asiedu (2005) reported that sprouting rates were higher in larger setts compared to smaller setts, with larger setts also producing higher yields. There is empirical evidence that sett size affects tuber yield due to differences in shoot growth; however, this phenomenon has not been well studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of seed sett size on sprouting, shoot growth, and tuber yield of white guinea yam (Dioscorea rotundata)

Iseki

Matsumoto

2019

Plant Production Science

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Approximately 30% of harvested yams are used in subsequent plantings as seed tubers, which reduces the harvest size; however, planting tuber pieces (setts) potentially represents a viable alternative. To determine how sett size affects yam production, different sett sizes were compared for sprouting, shoot growth, and tuber yield. Larger setts exhibited faster sprouting with greater shoot biomass due to larger shoot growth rates during the early growth period. Tuber yield from 200 g setts was higher than that from 50 g setts; however, this yield advantage was not enough to compensate for the cost of larger sett size. Thus, planting 50 g setts might be the most cost-effective. Even the 50 g setts yielded higher than 1 kg tuber per plant which were available for selling in markets. Thus, planting with smaller setts can be promising method for efficiently improving yam production.

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Section: Introductionmentioning

confidence: 99%

Effect of seed sett size on sprouting, shoot growth, and tuber yield of white guinea yam (Dioscorea rotundata)

Iseki

Matsumoto

2019

Plant Production Science

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“…While there is much variation in the response of D. rotundata to the minisett technique (Aighewi 1998), it has been suggested that increasing the size of minisetts of some varieties would enhance their sprouting potential (Ayankanmi et al 2005). However, Okoli and Akoroda (1995) noted that there is wastage of edible tubers being used for planting, as 5-30 g setts could produce the recommended seed yam sizes of 150-300 g (Akoroda 1985a;Onwueme and Charles 1994).…”

Section: Modern Methods Of Seed Yam Productionmentioning

confidence: 99%

“…Otherwise they could be pre-sprouted in beds, baskets or boxes using top soil, saw dust, shredded coir or carbonated rice husk as media. Sprouting and tuber yield of direct planted setts are strongly affected by variety (Ayankanmi et al 2005;Aighewi 1998). The condition of the soil at the time of planting also affects the survival of propagules.…”

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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“…The differences observed in the sprouting capacity within a yam variety may be attributed to apical dominance, whereas, varietal effects have stronger effects on the rate and timing of sprouting of directly planted setts (Ayankanmi et al 2005). Planting bigger sizes of minisetts in some yam varieties have been suggested to enhance their sprouting potential (Ayankanmi et al 2005). Pre-sprouting minisetts in a pest and disease free medium can also increase the chances of minisett survival, but this is more tedious (Okoli and Akoroda, 1995).…”

Section: Informational Factorsmentioning

confidence: 95%

“…Many differences have also been observed in the response of D. rotundata minisetts (Aighewi 1998). The differences observed in the sprouting capacity within a yam variety may be attributed to apical dominance, whereas, varietal effects have stronger effects on the rate and timing of sprouting of directly planted setts (Ayankanmi et al 2005). Planting bigger sizes of minisetts in some yam varieties have been suggested to enhance their sprouting potential (Ayankanmi et al 2005).…”

Section: Informational Factorsmentioning

confidence: 99%

Factors limiting the yam minisett technique adoption: A review

Ilesanmi

Akinmusola

2016

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The yam minisett technique was developed to overcome the scarcity of seed yams, and has been introduced to farmers more than any other scientifically improved yam propagation method. However, the adoption rate of this technique has not significantly improved over the years. This paper presents an overview of the factors contributing to the low adoption rate of the technique since its deployment in Nigeria. Three main classes of factors influencing the adoption of the yam minisett technology are presented; informational factors, technical factors and economic factors. Among the informational factors, low rate of extension contact coupled with low membership of social groups has negative impacts on the level of awareness of the technology. Issues relating to technical and economic limitations are the major challenges faced by the minisett technique adopters. Among these, the low survival and sprouting rate of minisetts, high labour costs and low level of capital are of utmost importance.

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Sprouting and yield of yam (Dioscorea spp.) minisetts in relation to sett size, soil moisture and agro-ecology

Cited by 7 publications

References 3 publications

Effect of seed sett size on sprouting, shoot growth, and tuber yield of white guinea yam (Dioscorea rotundata)

Effect of seed sett size on sprouting, shoot growth, and tuber yield of white guinea yam (Dioscorea rotundata)

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

Factors limiting the yam minisett technique adoption: A review

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