Analysis of Yam Minisett technique adoption in Nigeria

Morse, Stephen

doi:10.1080/15427528.2018.1458365

Cited by 12 publications

(26 citation statements)

References 15 publications

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“…Based on the traditional practice of cutting tubers into large chunks of up to 500 g to plant the ware crop, the yam minisett (tuber pieces of 25 to 50 g) technique (YMT) was developed to rapidly multiply yams (Aighewi et al 2015). This technique has generally had low rates of adoption after more than 30 years of its development and promotion (IITA 1985;Morse 2018). One of the reasons given for farmers' low level of adoption was the small size of seed yams produced.…”

Section: Introductionmentioning

confidence: 99%

“…One of the reasons given for farmers' low level of adoption was the small size of seed yams produced. The YMT was later refined by allowing for more flexibility in the size of minisetts of up to 100 g, depending on the seed yam size required (Morse 2018). This modification led to the development of the adaptive yam minisett technique (AYMT).…”

Section: Introductionmentioning

confidence: 99%

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Seed yam production from whole tubers versus minisetts

Aighewi

Maroya

Asiedu

et al. 2020

Journal of Crop Improvement

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Yam (Dioscorea rotundata Poir.) is a major staple and cash crop for millions of households in West Africa, where about 93% of the world crop is produced. The tuber serves as food and seed. Depending on the size, seed tubers are often cut into setts, minisetts, or planted whole. An experiment was conducted to investigate the effects of using whole tubers versus minisetts to produce seed yams. Six treatments constituted combinations of whole tubers and minisetts, and three tuber-size classes, viz., 30-59 g, 60-89 g, and 90-120 g (averaged and referred to as 45 g, 75 g, and 105 g, respectively). The experiment was conducted as a randomized complete block design with three replications. Results showed that plants from whole tubers emerged from the soil faster and yielded 48% more than those from minisetts. The mean yield of 105 g minisetts (18.3 t/ha) was statistically similar to that of 45 g whole seed (17.9 t/ha). Using 45 g whole seed would save about 2 t/ha of the harvested crop for use as food instead of seed. So, planting small whole tubers is more profitable than minisetts and is recommended to yam growers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seed yam production from whole tubers versus minisetts

Aighewi

Maroya

Asiedu

et al. 2020

Journal of Crop Improvement

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“…The minisett technique increases the multiplication ratio to about 1:30, and the seed size tubers produced are planted to obtain ware yam tubers. Although the adoption rate of this seed production technique has been low (Morse, 2018), it remains a viable option for farmers to rapidly multiply yam, especially when faced with the uncertainty of weather.…”

Section: Introductionmentioning

confidence: 99%

The influence of minisett size and time of planting on the yield of seed yam (Dioscorea Rotundata)

et al. 2020

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In traditional yam (Dioscorea spp.) production systems in West Africa, finding sole seed yam producers is rare and up to 30% of harvested tubers from the ware tuber crop is reserved to plant an equivalent area of the harvested crop during the next season. Many farmers typically must make a trade-off between food and seed in the use of available tubers. A study was carried out using a factorial experiment in a randomised complete block design to investigate the influence of planting different minisett sizes at different planting periods on the yield of seed yam with the aim of improving the availability of this expensive input and saving more ware tubers for food or sale. Results showed that by doubling or tripling the minisett size from 30 to 60 or 90 g, yields of seed yam increased by 61.1 and 103.3%, respectively. The 90 g minisetts had the highest values for all traits studied but had the least sett multiplication ratio. The early planted crop yielded 137% more than the late-planted crop. Significant interactions between minisett size, planting period and season were found. In 2016, although the highest yield of seed tubers was from early planted 90 g minisetts (35.6 t ha−1), the yield of early planted 30 g minisetts (23.8 t ha−1) was similar to those of 60 g planted mid-season (28.7 t ha−1) and 90 g planted late (20.0 t ha−1). To produce a high proportion of seed size tubers with less planting material, early planting of 30 g minisetts is recommended. Such practice will enhance seed tuber availability and food security by saving 1–2 t ha−1 of tubers that would have been used as seed instead of food.

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“…Suitable propagation methods are necessary in the domestication of any plant (Aighewi et al, 2015) and for plant genetic resources conservation and utilization. In cultivated yams, propagation often involves the selection of small whole tubers (seed yams) from the ware crop or minisetts cut from large tubers to provide planting material (Morse, 2018;Morse and McNamara, 2018), while nodal vine cuttings are grown to produce mini-tubers for use as seed yams in research stations (Aighewi et al, 2015;Balogun and Gueye, 2014). The propagation of cultivated yams from small whole tubers diverts as much as 30% of the annual harvest from consumption to future crop production (Ekanayake and Asiedu, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…This cost is reduced by propagation from minisetts (Ekanayake and Asiedu, 2003). However, there is a limit to reducing sett size for optimal propagation: the smaller the setts the smaller the tubers produced (Morse, 2018;Morse and McNamara, 2018).…”

Section: Introductionmentioning

confidence: 99%

Propagation of lusala(Dioscorea hirtiflora), a wild yam, forin situandex situconservation and potential domestication

2020

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SummaryLusala (Dioscorea hirtiflora Benth. subsp. pedicellata Milne-Redh) is an important wild edible tuber foraged widely from natural forests in Southern Zambia, but at risk from overharvesting and deforestation. Its propagation was investigated in glasshouse studies to explore potential domestication and future in situ and ex situ genetic resources conservation. Almost all tubers planted with visible shoot buds produced vines, with no effect of tuber size on vine emergence or tuber yield. Few tubers without visible shoot buds at planting produced vines, but those that did not re-tuberized. The progeny provided good vine emergence and similar tuber yield, with vines from tubers produced by re-tuberization being more vigorous. Re-tuberization in the absence of vine emergence also occurred in other experiments. Minisetts cut from the proximal end of tubers provided better vine emergence (with more from 20-mm than 10-mm-long sections) and greater tuber yield than mid- or distal minisetts. Nodal stem cuttings rooted well, vined, and provided small tubers. This study shows that lusala can be propagated successfully from tubers, minisetts, nodal vine cuttings, or mini-tubers from nodal vine cuttings, for genetic resources conservation and/or domestication. Domestication is likely to be hampered by the long period required for vines to emerge and establish. More sustainable foraging, including re-planting in natural forests, is recommended to balance consumption of lusala in the region and promote its long-term conservation.

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Analysis of Yam Minisett technique adoption in Nigeria

Cited by 12 publications

References 15 publications

Seed yam production from whole tubers versus minisetts

Seed yam production from whole tubers versus minisetts

The influence of minisett size and time of planting on the yield of seed yam (Dioscorea Rotundata)

Propagation of lusala(Dioscorea hirtiflora), a wild yam, forin situandex situconservation and potential domestication

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