Mini tuber production using yam (Dioscorea rotundata) vines

Abstract

Mini tubers were produced from two varieties of Dioscorea rotundata using vine cuttings planted in carbonized rice husk or coco‐peat in a screen house. The cuttings established better and produced more mini tubers in carbonized rice husk than in coco‐peat 100 days after planting. Vine cuttings of seven varieties planted in carbonized rice husk produced 1.7 ± 0.8 mini tubers per cutting with mean weight of 3.0 ± 2.7 g and 70.1% moisture content. About 63% of these sprouted after 77–105 days of storage under ambient air temperature. Vine cuttings of D. rotundata can be used to produce mini tubers within 100–120 days that could be used in germplasm exchange and for production of seed yams. Copyright © 2005 John Wiley & Sons, Ltd

Vine cutting propagation in four varieties of yam (<i>Dioscorea species</i>) using different planting media

“…Overall, sandy loamy soil happened to be the best media of propagation based on the values of tuber weight produced. Similar range of number of tubers per vine and tuber weight have been reported by many researchers working on vine cuttings in different yam species employing different methods of generating tubers from vines (Shiwachi et al, 2005;Kikuno, 2006;Behera et al, 2009;Ayankanmi and Agele 2010;Kabeya et al, 2013 andDibi et al, 2014).…”

“…Second, it reduces usage of tubers for seed production and third, it produces whole mini tubers which promise high sprouting rate and uniformity compared with mini-setts. Media like carbonized rice husk have produced mini tubers of Dioscorea alata of up to 3 g in weight by vine cuttings with about 63% of mini tubers sprouting after 77 to 105 days of storage (Shiwachi et al, 2005) and Kikuno et al (2006) have achieved greater success in seed tuber production through vine cuttings.…”

Effect of Plant Growth Hormones and Liquid Fertilizer on Rooting and Tuberization of Yam (&lt;i&gt;Dioscorea rotundata&lt;/i&gt; Poir.) Vine Cuttings

“…This reduces the proportion of production available for food. On average, it is estimated that 25% to 50% of the yam harvest is converted back into seed [12] [14] [15] [16].…”

Effects of planting methods and tuber weights on growth and yield of yam cultivars (Dioscorea rotundata Poir.) in Gabon

“…Nutritionally, yam are a major source of food for millions of people (Craufurd et al, 2006) and secondly agriculturally, yams tubers are used as planting material and pharmaceutically, some species of Dioscorea, particularly Dioscorea zingiberensis, produces high concentration of diosgenin, a chemical used for the commercial synthesis of sex hormones and corticosteroids (Yuan et al, 2005).Thus, a considerable part of harvest is preserved as planting stock. According to Shiwachi et al (2005), about 25 to 50% of the harvest of yams is used as such. Thus, the cost of the planting material increases the total production cost.…”

“…Considering this large quantity of tubers engaged as seed that could have been available for human consumption, other modern methods of production of healthy seed yams were tested (Aighewi et al, 2015). More recently, rooting of 20 cm long 3-node vines (Acha et al, 2004;Kikuno et al, 2007;Shiwachi et al, 2005;Agele et al, 2010;Ayankanmi and Agele, 2010;Muamba et al, 2013;Dibi et al, 2014;Otoo et al, 2016);aeroponics system for seed yams production, (Behera et al, 2009;Sheeba et al, 2013; produced mini tubers of 50 to 600 g after 8 months giving a 1: 22 propagation ratio;or the pregermination in seedbed (Asare-Bediako et al,2007;Dasbak et al, 2011). All of these macro propagation techniques are genotype-dependent and have no provision for cleaning infected seed yam; tuber dormancy remains a challenge (Balogun et al, 2014).Tissue culture plays an important role in the production and international exchange of disease free planting materials of yams in form of plantlets and potentially as micro tubers, but it has some obvious limitations.…”