Evaluation and selection of taro [<i>Colocasia esculentra</i>(L.) Schott] accessions under dryland conditions in South Africa

Gerrano, Abe Shegro; Rensburg, W.S. Jansen van; Adebola, Patrick; Manjeru, Pepukai; Bairu, Michael W.; Venter, S.L.

doi:10.1080/09064710.2018.1530296

Cited by 7 publications

(6 citation statements)

References 23 publications

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“…The variation in plant height among varieties might be attributed to differences in their genetic expression or response under a given environment. This result agrees with the works of Gerrano et al. (2018) and Angami et al.…”

Section: Resultssupporting

confidence: 94%

Evaluation of improved taro (Colocasia esculenta(L.) Schott) genotypes on growth and yield performance in North-Bench woreda of Bench-Sheko zone, South-Western Ethiopia

Legesse

Bekele

2021

Heliyon

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Taro is the world's fourth most important root crop in terms of production by weight, behind cassava, potato, and sweet potato, and the second most significant staple root crop in terms of consumption, after sweet potato. However, a shortage of well-adapted cultivars is one of the production problems that contribute to low yields and small planted areas across the country. As a result, genotypes with high production potential and adaptability for local environmental circumstances must be evaluated. During the 2018 and 2019 main cropping seasons, field experiments were done in the North-Bench woreda in the Bench-Sheko zone, south-western Ethiopia, to improve taro production and productivity by evaluating and selecting high yielding taro cultivars. Three improved and one local taro variety were used in the trial, which was laid out in a randomized complete block design (RCBD) with three replications at the North bench location. The data were collected and analyzed by using SAS 9.2 Version statistical software. The study's findings revealed that variety had a significant (P < 0.01) impact on all of the variables considered. Accordingly, combined analysis over years indicated that the highest leaf number per plant (7.76), plant diameter (40.82cm), corm diameter (8.28cm), cormel number per plant (6.10), and total yield (22.34 t/ha) were observed for Boloso-1 variety. The highest value of the number of suckers per plant was also observed for the Boloso-1 variety in both years (8.2 in 2018 and 6.2 in the 2019 growing season). However, combined analysis over years indicated the highest corm length in local variety (12.15cm) followed by Boloso-1 variety (10.34cm). Therefore, based on the overall results of this study, the Boloso-1 variety performed best and was more adapted to the area as compared to other varieties. This variety should be popularized and disseminated to users to boost the production and productivity of taro in the testing location and similar agro-ecologies of the region.

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Section: Resultssupporting

confidence: 94%

Evaluation of improved taro (Colocasia esculenta(L.) Schott) genotypes on growth and yield performance in North-Bench woreda of Bench-Sheko zone, South-Western Ethiopia

Legesse

Bekele

2021

Heliyon

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“…Fourteen accessions of taro ( Table 1 ) were selected from the previous study for yield, and yield related as well as growth traits ( Gerrano et al., 2019 ). The accessions were diverse in their original sources, which included accessions collected from rural areas of KwaZulu-Natal Province in South Africa and introductions from other origin.…”

Section: Methodsmentioning

confidence: 99%

“…Five plants were planted per row at 30 cm constant intervals. The plots were separated by 1.5 m paths to minimize interference for field evaluation ( Gerrano et al., 2019 ). The middle rows and middle three plants (eliminating border effects) were harvested for sampling of corms for nutritional analysis.…”

Section: Methodsmentioning

confidence: 99%

“…Despite the importance and potential of taro to address nutrient deficiencies, most evaluation studies of taro were centered on agronomic traits such as maturity, height and yield. The South African Agricultural Research Council (ARC) evaluated different taro accessions grown by resource poor farmers in South Africa for growth and agronomic performance, and identified accessions that have genetic potential ( Gerrano et al., 2019 ) to be included in the taro nutritional breeding programme ( Figure 1 A and B). In order to achieve a need-driven breeding programme of taro that enhances food and nutritional security, due considerations must be given to the crop nutritional attributes including its macro- and micronutrient content.…”

Section: Introductionmentioning

confidence: 99%

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Variation in mineral element composition of landrace taro (Colocasia esculenta) corms grown under dryland farming system in South Africa

Gerrano

Mathew

Shayanowako

et al. 2021

Heliyon

Self Cite

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Taro [ Colocasia esculenta (L.) Schott] has the potential to address food and nutrition insecurity in sub-Saharan Africa. However, the nutrient content of taro is yet to be fully elucidated. The objective of this study was to evaluate mineral element content as a proxy for nutritional value of different taro genotypes. The study evaluated 14 taro accessions at Roodeplaat and Umbumbulu in South Africa based on their calcium (Ca), iron (Fe), potassium (K), magnesium (Mg), manganese (Mn), sodium (Na), phosphorous (P) and zinc (Zn) content. The accessions were planted in a randomized complete block design, replicated three times under field conditions. The mineral element content varied significantly (p < 0.05) among the genotypes. Genotypes Amad7-2, Umbu8 and Amad101 exhibited high Ca (≥432 mg kg −1 ), Fe (≥32 mg kg −1 ) and Mg (≥229 mg kg −1 ) across the locations. The first principal component (PC) accounted for 33.7% of the variation and was strongly associated with Zn (r = 0.94, p < 0.001) and P (r = 0.89, p < 0.001). The second PC explained 29.7% of the variation and was associated with Na (r = 0.83, p < 0.001), Mg (r = 0.76, p < 0.001) and K (r = 0.55, p < 0.05). Fe and Mn contributed below the 12.5% threshold to the PCs and were considered as less discriminatory among the accessions. The negative correlations among some of the mineral elements would be a challenge for selection and breeding of nutritious taro accessions. This information is essential to select superior local accessions based on their mineral element content for developing breeding populations and lines for improving nutrition quality among poor households in sub-Saharan Africa.

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“…Taro plants as a whole, including leaves, pseudostems, and corms, are consumed as vegetables by the tribal communities of this region. Corms and cormels of taro are among the cheapest sources of vitamins, minerals, and dietary carbohydrates for the resource-poor farmers [3]. The productivity of taro is severely affected due to biotic and abiotic stresses.…”

Section: Introductionmentioning

confidence: 99%

Role of Ascorbate–Glutathione (AsA–GSH) Pathways in Phytophthora Leaf Blight Disease Resistance in Taro (Colocasia esculenta L. Schott)

Devi

Dasgupta

Mandal

et al. 2020

IRJPAC

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Taro (Colocasia esculenta L. Schott) is one of the important staple vegetable crops grown worldwide for its nutritious corms, leaves, and pseudostems. Taro invaded by leaf blight disease caused by Phytophthora colocasiae Racib. (Pc) resulted in 50% yield loss. On the other hand, inherent defense mechanisms of taro encounter the invaders to protect the plant from Pc invasion. The ascorbate–glutathione (AsA–GSH) pathways play an essential role in scavenging reactive oxygen species (ROS), a common phenomenon in plant–pathogen interaction. The present study focused on AsA–GSH regulations of thirty genotypes of taro under induced Pc infection. RCMC–5, among the tested taro genotypes, registered consistently higher induction of AsA, GSH, Ascorbate peroxidase (APX), monodehydroascorbate reductase (MDAR), and dehydroascorbate reductase (DHAR) to encounter the Pc infection and overproduction of ROS. However, glutathione reductase (GR) was more prominent in DP–25, Jhankri, and TSL. AsA–GSH encounters the ROS overproduction, which was confirmed with lower H2O2 (0.20 µM g–1 FW) and malondialdehyde (MDA) content (20.10 nM g–1 FW) in resistant genotypes (RCMC–5) subsequently resulted in lower Pc infection (spot diameter, <2.0 cm and sporangia, <2). RCMC–5 could be one of the lines of interest in taro breeding programs for developing Pc resistant lines. AsA–GSH cycle could be a reliable parameter while selecting resistant lines for augmenting breeding strategies in taro against Phytophthora.

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Evaluation and selection of taro [Colocasia esculentra(L.) Schott] accessions under dryland conditions in South Africa

Cited by 7 publications

References 23 publications

Evaluation of improved taro (Colocasia esculenta(L.) Schott) genotypes on growth and yield performance in North-Bench woreda of Bench-Sheko zone, South-Western Ethiopia

Evaluation of improved taro (Colocasia esculenta(L.) Schott) genotypes on growth and yield performance in North-Bench woreda of Bench-Sheko zone, South-Western Ethiopia

Variation in mineral element composition of landrace taro (Colocasia esculenta) corms grown under dryland farming system in South Africa

Role of Ascorbate–Glutathione (AsA–GSH) Pathways in Phytophthora Leaf Blight Disease Resistance in Taro (Colocasia esculenta L. Schott)

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