Yacon potato propagation from herbaceous cuttings with different numbers of buds

Joab Luhan Ferreira Pedrosa,Moises Zucoloto,Mateus Oliveira Cabral,Fábio Luiz De Oliveira,Ramon Amaro De Sales,Arnaldo Henrique De Oliveira Carvalho

doi:10.7764/ijanr.v47i1.2134

Abstract

The objective of this study was to evaluate yacon potato propagation from herbaceous cuttings with different numbers of buds. Therefore, an experiment was carried out in two phases. The first phase was carried out in a greenhouse with seedlings using a randomized complete block design with 40 replicates. The treatments consisted of varying the number of buds per cutting: two buds (T1), three buds (T2), or four buds (T3). The second phase was carried out in the field following a randomized complete block design with 4 replicates, and the treatments were the same as those used in the seedling phase. The following morphological characteristics were evaluated: number of leaves per plant, leaf area, plant height, stem diameter, number of stems per plant, leaf dry mass, stems, rhizophores, tuberous roots, and tuberous root yield. The physiological characteristics evaluated were the relative chlorophyll content (FCI - Falker chlorophyll index), net CO 2 assimilation rate, leaf transpiration, stomatal conductance, internal CO 2 concentration, water use efficiency and instantaneous carboxylation efficiency. It was observed that the seedlings from cuttings with 3 buds presented higher stomatal conductance ( g s ), which reflected their higher transpiration rates. The yacon potato presented the best vegetative and productive development when propagated by herbaceous cuttings with three buds.

Highlights

Yacon potato is indigenous to the Andean region
The seedlings originating from cuttings with 2 or 3 buds showed a higher number of leaves and a greater leaf area per plant than the seedlings originating from 4-bud cuttings (Table 1)
The more vigorous shoots and larger leaves were reflected in the shoot dry mass accumulation, which was higher in the seedlings from cuttings with 2 or 3 buds and the higher root dry mass in seedlings from cuttings with 3 buds (Table 1)

Summary

Introduction

Yacon potato is indigenous to the Andean region. In recent years, it has attracted significant inter-VOLUME 47 No1 JANUARY – APRIL 2020 energy content (1.5 kcal g-1) and performing functions similar to dietary fiber (Genta et al, 2009). Yacon potato is indigenous to the Andean region. In recent years, it has attracted significant inter-. Yacon potato is a prebiotic food with low calorie content that is suitable for people with diabetes and who are overweight (Sacramento et al, 2017). Studies on yacon potato are mainly based on their potential as a functional and medicinal food (Delgado et al, 2013, Satoh et al, 2013). Information on their agronomic management, propagation and plant physiology is scarce (Silva et al, 2018; Kamp et al, 2019). The main way to propagate yacon is by its vegetative parts, which is due to the difficulty in obtaining viable botanical yacon seeds (Zardini et al, 1991)

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Conclusion