Variability and Inter-Relationships between Yield and Associated Traits in Taro (Colocasia esculenta (L.) Schott)

Eze, Chinedu Emmanuel; Nwofia, G. E.

doi:10.9734/jeai/2016/27053

Cited by 5 publications

(5 citation statements)

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“…High yield in ‘Boloso-1’ may be attributed to better utilization of photosynthates (due to maximum growth variables like plant height, leaf number, number of suckers, and plant diameter), resulting in better-sized corm diameter; it could also be due to a higher number of cormels per plant which in turn, maybe due to accumulated storage foods, which have a direct bearing on crop yield ( Bhuiyan and Quadir, 1989 ). Cormel weight and the number of cormels per plant, according to Eze and Nwofia (2016) , are the most important predictors of taro yield, accounting for around 72 percent of the overall variation in yield and thus serving as important selection indices for taro yield improvement. Similar variations in yield among taro varieties were also reported by Angami et al.…”

Section: Resultsmentioning

confidence: 99%

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: Resultsmentioning

confidence: 99%

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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“…The high genetic diversity would enlarge chances of success selection in plant breeding due to the higher frequency of genes (Hapsari 2014). Confirmable to Eze and Nwofia (2016) that plant height, number of suckers, length, and weight of corm and cormlet weight has high heritability. This research result reveals additional information that oxalate content also has a high value of heritability, PVC and GVC.…”

Section: Genetic Propertiesmentioning

confidence: 95%

Genetic diversity in Eddoe Taro (Colocasia esculenta var. antiquorum) from Indonesia based on morphological and nutritional characteristics

Maretta

Sobir

Helianti³

et al. 2020

Biodiversitas

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Abstract. Maretta D, Sobir Helianti I, Purwono, Santosa E. 2020. Genetic diversity in Eddoe Taro (Colocasia esculenta var antiquorum) from Indonesia based on morphological and nutritional characteristics. Biodiversitas 21: 3525-3533. Low yield uniformity and quality due to genetic performance become negative incentives to farmers in Eddoe Taro production. However, genetic evaluation is rarely been reported in this taro type in Indonesia. In this study, 14 eddoe genotypes collected from different regions in Indonesia were evaluated to develop a diversity map for crop improvement and future breeding activities. The genotypes were planted in the open field from September 2018 to March 2019 at the experimental station belonging to LAPTIAB-BPPT, PUSPITEK at South Tangerang District, Indonesia. Morphological and nutritional characters were accessed on the shoot and underground parts. The genotypes exhibited variation in 38 out of 48 characters in which 12 quantitative characters were distinct including oxalate level. The study revealed three findings: (i) Characters related to growth and yield had high genotypic variance coefficients, i.e., sheath length, total petiole length, plant height, number of suckers, corm and cormels weight, (ii) Genotypes clustered into two separate groups as introduced and landraces, and (iii) Landraces had high genetic variation leading to speculation of high clonal variation. Considering the findings, accession S6, S7, S18, S30, and S36 are recommended for further studies in crop improvement purposes.

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“…The phenotypic coefficient of variability (PCV) was generally higher than the GCV for all the studied traits but the differences were quite small except for the number of cormels per plant. This suggests that environmental effects constitute a less portion of the total phenotypic variation in the traits [51].…”

Section: Southeast Nigerian Taro Has Untapped Phenotypic Variabilitymentioning

confidence: 99%

Detection of the local adaptive and genome-wide associated loci in southeast Nigerian taro (Colocasia esculenta (L.) Schott) populations

et al. 2023

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Background Taro has a long history of being consumed and remains orphan and on the hand Nigeria farmers. The role of farmer-driven artificial selection is not negligible to fit landraces to a particular ecological condition. Limited study has been conducted on genome-wide association and no study has been conducted on genome-environment association for clinal adaptation for taro. Therefore, the objective of this study was to detect loci that are associated with environmental variables and phenotype traits and forward input to breeders. The study used 92 geographical referred taro landraces collected from Southeast (SE) Nigeria. Results The result indicates that SE Nigerian taro has untapped phenotype and genetic variability with low admixture. Redundancy analysis indicated that collinear explained SNP variation more than single climatic variable. Overall, the results indicated that no single method exclusively was able to capture population confounding effects better than the others for all six traits. Nevertheless, based on overall model performance, Blink seemed to provide slight advantage over other models and was selected for all subsequent assessment of genome-environment association (GEA) and genome-wide association study (GWAS) models. Genome scan and GEA identified local adapted loci and co-located genes. A total of nine SNP markers associated with environmental variables. Some of the SNP markers (such as S_101024366) co-located with genes which previously reported for climatic adaptation such as astringency, diaminopimelate decarboxylase and MYB transcription factor. Genome-wide association also identified 45, 40 and 34 significant SNP markers associated with studied traits in combined, year 1 and year 2 data sets, respectively. Out of these, five SNP markers (S1_18891752 S3_100795476, S1_100584471 S1_100896936 and S2_10058799) were consistent in two different data sets. Conclusions The findings from this study improve our understanding of the genetic control of adaptive and phenotypic traits in Nigerian taro. However, the study suggests further study on identification of local adaptive loci and GWAS through collection of more landraces throughout the country, and across different agro-ecologies.

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Variability and Inter-Relationships between Yield and Associated Traits in Taro (Colocasia esculenta (L.) Schott)

Cited by 5 publications

References 1 publication

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

Genetic diversity in Eddoe Taro (Colocasia esculenta var. antiquorum) from Indonesia based on morphological and nutritional characteristics

Detection of the local adaptive and genome-wide associated loci in southeast Nigerian taro (Colocasia esculenta (L.) Schott) populations

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