Genotype × environment interaction for root yield of elite sweet potato (Ipomoea batatas (L) lam.) genotypes

Sweet potato breeding in Africa, more especially in Nigeria, has mainly focused on improving productivity on farmers' fields and on fresh root consumption. In order to target the breeding program, the study was conducted to estimate the magnitude of genotype × environment interaction (G × E) and to select stable and high yielding sweet potato genotypes for fresh root yield and root Cylas severity in two locations, and to identify the most discriminating and representative test environments in Nigeria. The 41 genotypes were evaluated across two diverse environments using a randomized complete block design (RCBD) with three replications. Data were collected on total number of roots per plant, number and weight of marketable roots per plant, fresh root yield, and root Cylas severity. The data were subjected to analysis of variance using the Generalized Linear Model procedure of SAS 9.2 where genotype was treated as a fixed factor and replication treated as a random variable. Stability analysis was conducted using Genotype and Genotype x Environment Interaction (GGE) bi-plot. Environment, genotype, and G × E interaction variances were highly significant (p < 0.01) among the assessed agronomic traits. Moreover, the analysis of variance revealed highly significant (p < 0.01) differences among genotypes, environments, and G × E interaction effects for all the studied traits. The GGE biplot analyses identified three promising genotypes—G13, G11, and G14—that possess both high mean root yield and high stability, closest to the ideal genotype for root performance and consistency of performance across environments. This study provides valuable information that could be utilized in a breeding program to ameliorate local clones of sweet potato in Nigeria.

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Release of orange-fleshed sweetpotato (Ipomoea batatas [l.] Lam.) cultivars in Mozambique through an accelerated breeding scheme

The Journal of Agricultural Science ◽

10.1017/s002185961600099x ◽

2016 ◽

Vol 155 (6) ◽

pp. 919-929 ◽

Cited By ~ 12

Author(s):

M. I. ANDRADE ◽

J. RICARDO ◽

A. NAICO ◽

A. ALVARO ◽

G. S. MAKUNDE ◽

...

Keyword(s):

Ipomoea Batatas ◽

Block Design ◽

Dry Weight ◽

Genetic Enhancement ◽

Environment Interaction ◽

Storage Root ◽

Root Yield ◽

Breeding Scheme ◽

Genotype Environment Interaction ◽

Iron And Zinc

SUMMARYSweetpotato breeding requires at least 5 years to obtain an advanced breeding clone for further testing with the goal of cultivar release. An accelerated breeding scheme (ABS) can be feasible if the genotype × year interaction is low. The objectives of the present study were to describe an ABS for sweetpotato and to investigate the efficiency of this breeding scheme for selecting high-yielding and well-adapted orange-fleshed sweetpotato (OFSP) cultivars with high β-carotene (BC) content. More than 198 500 seeds from two crossing blocks were germinated and rapidly multiplied for evaluation in observation trials at four breeding locations in Mozambique. Breeding clones with storage root yields above 10 t/ha were advanced to preliminary and advanced yield trials across four sites and for 3 years. As a result, 64 high-yielding OFSP breeding clones were selected and evaluated in four mega-environments following a randomized complete block design with three replicates at Angónia, Chókwè, Gurúè and Umbelúzi. Data from multi-environment trials were subjected to single site and combined analysis of variance as well as to stability analysis. The genotype × environment interaction was highly significant for storage root and vine yields, dry matter (DM) and BC content. Storage root yield and DM content for 15 OFSP breeding clones ranged from 14·9 to 27·1 t/ha and from 24·8 to 32·8%, respectively. BC content, iron and zinc ranged from 5·9 to 38·4, 1·6 to 2·1 and 1·1 to 1·5 mg/100 g dry weight, respectively. The OFSP breeding clones also met the culinary tastes required by local consumers in Mozambique. The proposed ABS seems to be an attractive scheme for genetic enhancement of sweetpotato.

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Potassium Fertilization Stimulates Sucrose-to-Starch Conversion and Root Formation in Sweet Potato (Ipomoea batatas (L.) Lam.)

International Journal of Molecular Sciences ◽

10.3390/ijms22094826 ◽

2021 ◽

Vol 22 (9) ◽

pp. 4826

Author(s):

Yang Gao ◽

Zhonghou Tang ◽

Houqiang Xia ◽

Minfei Sheng ◽

Ming Liu ◽

...

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Intercellular Co2 Concentration ◽

Biomass Accumulation ◽

Starch Accumulation ◽

Storage Root ◽

Root Yield ◽

Starch Conversion ◽

And Storage ◽

Low K

A field experiment was established to study sweet potato growth, starch dynamic accumulation, key enzymes and gene transcription in the sucrose-to-starch conversion and their relationships under six K2O rates using Ningzishu 1 (sensitive to low-K) and Xushu 32 (tolerant to low-K). The results indicated that K application significantly improved the biomass accumulation of plant and storage root, although treatments at high levels of K, i.e., 300–375 kg K2O ha−1, significantly decreased plant biomass and storage root yield. Compared with the no-K treatment, K application enhanced the biomass accumulation of plant and storage root by 3–47% and 13–45%, respectively, through promoting the biomass accumulation rate. Additionally, K application also enhanced the photosynthetic capacity of sweet potato. In this study, low stomatal conductance and net photosynthetic rate (Pn) accompanied with decreased intercellular CO2 concentration were observed in the no-K treatment at 35 DAT, indicating that Pn was reduced mainly due to stomatal limitation; at 55 DAT, reduced Pn in the no-K treatment was caused by non-stomatal factors. Compared with the no-K treatment, the content of sucrose, amylose and amylopectin decreased by 9–34%, 9–23% and 6–19%, respectively, but starch accumulation increased by 11–21% under K supply. The activities of sucrose synthetase (SuSy), adenosine-diphosphate-glucose pyrophosphorylase (AGPase), starch synthase (SSS) and the transcription of Susy, AGP, SSS34 and SSS67 were enhanced by K application and had positive relationships with starch accumulation. Therefore, K application promoted starch accumulation and storage root yield through regulating the activities and genes transcription of SuSy, AGPase and SSS in the sucrose-to-starch conversion.

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Yield and soil insect resistance in sweet potato clones

Bioscience Journal ◽

10.14393/bj-v35n6a2019-42452 ◽

2019 ◽

Vol 35 (6) ◽

Author(s):

Daiane da Silva Nóbrega ◽

José Ricardo Peixoto ◽

Michelle Souza Vilela ◽

Anne Kelly da Silva Nóbrega ◽

Elaine Caetano Santos ◽

...

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Starch Content ◽

Block Design ◽

Titratable Acidity ◽

Soluble Solids ◽

Soil Conditions ◽

Root Yield ◽

Pests And Diseases ◽

Soil Insects

Sweet potato (Ipomoea batatas) is a rustic horticultural crop with high production potential. However, the crop is susceptible to many pests and diseases. The objective of this study was to evaluate 10 genotypes of sweet potato regarding their yield and resistance to soil insects, under Brazilian cerrado soil conditions. Genotypes were selected from the Sweet Potato Germplasm Bank of Embrapa Hortaliças. The experiment was conducted at Água Limpa Farm, belonging to University of Brasilia (UnB), and consisted of a randomized block design, with 10 treatments (genotypes), 10 plants per plot, and four replications. The following traits were analyzed: number of perforations per root, incidence of roots injured by insects, plant resistance degree, root shape, total and marketable root yields, root peel color, root pulp color, pulp total soluble solids, pulp titratable acidity, pulp TSS/TA ratio, pulp moisture, and pulp starch yield. Genotype CNPH 53 (26.78 t ha-1) presented total root yield greater than the commercial variety Brazlândia Rosada (17.54 t ha-1). Genotype Santa Sofia (11.77 t ha-1) and Brazlândia (13.5 t ha-1) had similar marketable root yields. CNPH 53 showed the best agronomic performance, exhibiting moderate susceptibility to soil insects and root shape meeting the market standards. It also had low pulp TA (2.53%); high pulp TSS (12.25 °Brix) and pulp TSS/AT ratio (4.24); pulp moisture content close to 70%; and the highest pulp starch content (11.98%). The traits number of perforations per root, root shape, and pulp TA presented heritability values close to 70%. Marketable root yield, pulp moisture, and pulp starch content demonstrated heritability values greater than 90% and CVG/CVE greater than 1.

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Genotype-by-environment interaction of newly-developed sweet potato genotypes for storage root yield, yield-related traits and resistance to sweet potato virus disease

Heliyon ◽

10.1016/j.heliyon.2019.e01448 ◽

2019 ◽

Vol 5 (3) ◽

pp. e01448 ◽

Cited By ~ 3

Author(s):

Stephan Ngailo ◽

Hussein Shimelis ◽

Julia Sibiya ◽

Kiddo Mtunda ◽

Jacob Mashilo

Keyword(s):

Sweet Potato ◽

Virus Disease ◽

Genotype By Environment Interaction ◽

Environment Interaction ◽

Storage Root ◽

Root Yield ◽

Genotype By Environment ◽

Potato Virus Disease ◽

Sweet Potato Virus ◽

Sweet Potato Virus Disease

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Influence of morpho-physiological traits on root yield in sweet potato (Ipomoea batatas Lam.) genotypes and its adaptation in a sub-humid environment

Scientia Horticulturae ◽

10.1016/j.scienta.2020.109703 ◽

2021 ◽

Vol 275 ◽

pp. 109703

Author(s):

Jazmín V Pérez-Pazos ◽

Amparo Rosero ◽

Remberto Martínez ◽

José Pérez ◽

Julio Morelo ◽

...

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Physiological Traits ◽

Root Yield ◽

Humid Environment

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Effects of Viruses (SPVD) on Growth and Yield of Sweet Potato

Experimental Agriculture ◽

10.1017/s0014479700010310 ◽

1979 ◽

Vol 15 (3) ◽

pp. 253-256 ◽

Cited By ~ 34

Author(s):

S. K. Hahn

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Virus Disease ◽

Severe Disease ◽

Growth And Yield ◽

Root Yield ◽

Disease Symptoms ◽

Vein Clearing ◽

Chlorophyll Level ◽

Yield Trials

SUMMARYSweet potato (Ipomoea batatas L.) virus disease (SPVD) causes severe disease symptoms of various combinations of leaf strapping, vein-clearing, puckering and stunting. The disease is widespread, especially in Africa, and yield is adversely affected, though there are no figures to quantify this effect nor is it known how yield is affected. Loss of tuberous root yield due to SPVD was studied in sweet potato showing symptoms of the disease. Slips were obtained from plants with and without symptoms and two yield trials in 2 years were conducted by planting them alternately in rows. Yield of fresh tubers was reduced by 78% in plants showing SPVD symptoms but the reduced chlorophyll level of diseased leaves did not appear to affect yield.

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Evaluation of Orange Fleshed Sweet Potato (Ipomoea batatas L.) Genotypes for Higher Yield and Quality

The Agriculturists ◽

10.3329/agric.v11i2.17483 ◽

2013 ◽

Vol 11 (2) ◽

pp. 21-27 ◽

Cited By ~ 3

Author(s):

MH Rahman ◽

MM Alam Patwary ◽

H Barua ◽

M Hossain ◽

S Nahar

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Dry Matter ◽

Agricultural Research ◽

Research Station ◽

Root Yield ◽

Agricultural Research Institute ◽

Yield And Quality ◽

Orange Fleshed Sweet Potato ◽

Research Institute

Four orange fleshed sweet potato (OFSP) genotypes viz., CIP 194513.15, CIP 194515.15, CIP 441132 and CIP 440267.2 collected from International Potato Centre (CIP) and four BARI (Bangladesh Agricultural Research Institute) - hybrid orange flesh sweet potato genotypes viz., H16/06, H19/06, H3/07 and H6/07 were evaluated against BARI SP-3 and BARI SP-4 having orange fleshed at Agricultural Research Station, Bangladesh Agricultural Research Institute, Pahartali, Chittagong for yield and quality. The highest (31.59 t/ha) tuberous root yield was found in CIP 194513.15 which was followed by CIP 440267.2 (30.97 t/ha) and the lowest yield (13.34 t/ha) was obtained in BARI SP 3. The maximum dry matter (29.83%) was obtained in H6/07 while the minimum dry matter (17.61%) was obtained in CIP 441132. Among the tested genotypes the highest (approximately) Vitamin A (919.2 ?g/100 g RE, FW) was recorded in CIP 440267.2, which had red skin and latex absent flesh and the lowest was (approximately) in H6/07 (Vit A 0.0 ?g/100 g RE, FW). The results of the present study indicated that CIP 440267.2 is suitable among the OFSP genotypes for cultivation in Bangladesh on the basis of yield and quality mainly carotinous. DOI: http://dx.doi.org/10.3329/agric.v11i2.17483 The Agriculturists 2013; 11(2) 21-27

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