Nutritional and phenotypic variations among newly selected African eggplant (Solanum aethiopicum L.)

Main Article Content

Olawale Olusesan. Oguntolu
https://orcid.org/0000-0001-5588-6986
Christian Okechukwu Anyaoha
https://orcid.org/0000-0003-2401-2949
Victor Anozie Chikaleke
https://orcid.org/0000-0003-2192-8337
Joseph Akindojutimi Temidayo Olofintoye

Abstract

African eggplant (Solanum aethiopicum L.) is an important but underutilized leafy and fruit vegetable. Systematic characterization of available eggplant accessions for morphological and nutritional traits is paramount to their genetic improvement. This study characterized the diversity among selected S. aethiopicum accessions from Nigeria to identify promising genotypes for future breeding activities in the region. Twenty new purified African eggplant accessions collected from farmers’ fields were characterized using morphological and nutritional descriptors. The accessions varied significantly in qualitative, quantitative and nutritional parameters. Top performers for selected yield-contributing traits and nutritional parameters were NHEPA54, NHEPA39-1, NHEAP10, NHEPA10, NHEPA1, NHEPA56, NHEPA23 for vitamin C, iron, calcium, days to flowering, number of branches, plant height at maturity and number of fruits per plant respectively. The first four principal components accounted for 72.42% of total variability. The first principal component with the largest variation (28.77%) was loaded with number of branches, plant height at maturity, number of fruits per cluster, number of fruits per plant and fruit width. A significant positive association was exhibited between iron and yield-increasing traits such as number of fruits per plant (r = 0.532) and number of fruits per cluster (r = 0.551). Plant height at maturity positively correlated with vitamin C (r = 0.492) indicating predictable success in selecting top-performing eggplant genotypes combining high-yield potential and nutritional content. Top-performing eggplant genotypes identified in this study could be deployed as donors for a hybridization programme to develop new eggplant varieties with higher yield potential and improved nutritional quality.

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How to Cite
Oguntolu, O. O., Anyaoha, C. O., Chikaleke, V. A. and Olofintoye , J. A. T. (2022) “Nutritional and phenotypic variations among newly selected African eggplant (Solanum aethiopicum L.)”, Genetic Resources, 3(6), pp. 38–48. doi: 10.46265/genresj.WCZG9712.
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Original Articles
References

Adeniji, O T and A Aloyce (2012). “Farmer’s knowledge of horticultural traits and participatory selection of African eggplant varieties (S. aethiopicum) in Tanzania”. Tropicultura 30(3), pp. 185–191. URL: http://www.tropicultura.org/text/v30n3/185.pdf.

Adeniji, O T, P M Kusolwa, and S Reuben (2013). “Morphological descriptors and micro satellite diversity among scarlet eggplant groups”. African Crop Science Journal 21(1), pp. 37–49.

Anshori, M F et al. (2018). “Determination of selection criteria for screening of rice genotypes for salinity tolerance”. J. Breed. Genet 50, pp. 279–294.

Arivalagan, M et al. (2013). “Mineral composition and their genetic variability analysis in eggplant (Solanum melongena L.) germplasm”. Journal of Applied Botany and Food Quality 86, pp. 99–103. DOI: https://doi.org/10.5073/JABFQ.2013.086.014.

AVRDC (2003). AVRDC report 2002. AVRDC Publication No. 03-563. Shanhua, Taiwan.

Bationo-Kando, P et al. (2015). “Characterization of Solanum aethiopicum (Kumba group) in Burkina Faso”. International Journal of Science and Nature 6(2), pp. 169–176. DOI: https://doi.org/10.5897/JPBCS2018.0755. DOI: https://doi.org/10.5897/JPBCS2018.0755

Bonsu, K O et al. (1998). “Characterization of hot pepper (Capsicum spp) germplasm in Ghana”. In: Proceedings of the 1st Biennial Agricultural Research Workshop.

Burton, G W (1952). “Quantitative inheritance in grasses”. In: Proceedings of the 6th International Grassland Congress, pp. 227–283.

Chikaleke, V A (2018). Reproductive biology and genetic components of yield in eggplant (Solanum species).

Clifford, H and W Stephenson (1975). An introduction to numerical classification. London, New York, xii: Academy press, pp. 229–229. DOI: https://doi.org/10.1016/B978-0-12-176750-1.50013-0

Denkyirah, E K (2013). Variation in Floral Morphology, Fruit Set and Seed Quality of Garden Egg (Solanum Aethiopicum Var Gilo) Germplasm in Ghana. URL: http://197.255.68.203/handle/123456789/5559.

Dhaka, S K and A K Soni (2013). “Genotypic and phenotypic correlation study in brinjal genotypes”. Annals Pl. Soil Res 16, pp. 53–56.

Docimo, T et al. (2016). “Phenylpropanoids accumulation in eggplant fruit: characterization of biosynthetic genes and regulation by a MYB transcription factor”. Frontiers in Plant Science 6, pp. 1233–1233. DOI: https://doi.org/10.3389/fpls.2015.01233. DOI: https://doi.org/10.3389/fpls.2015.01233

FAO, IFAD, UNICEF, WFP and WHO (2018). The State of Food Security and Nutrition in the World 2018. Building climate resilience for food security and nutrition. Rome: FAO. URL: https://www.fao.org/3/I9553EN/i9553en.pdf.

Grittins, R (1975). “The application of ordination techniques”. Multivariate statistical methods. Ed. by E.H. Bryanf and W.R. Atchley, pp. 102–131.

IBPGR (1990). Descriptors for eggplant. International Board for Plant Genetic Resources. URL: https://hdl.handle.net/10568/72874.

Iezzoni, A F and M P Pritts (1991). “Application of principal component analysis to horticultural research”. Hort Science 26(4), pp. 334–338. DOI: https://doi.org/10.21273/HORTSCI.26.4.334. DOI: https://doi.org/10.21273/HORTSCI.26.4.334

Igwe, S A, D N Akunyili, and C Ogbogu (2003). “Effects of Solanum melongena (garden egg) on some visual functions of visually active Igbos of Nigeria”. Journal of Ethnopharmacology 86(2-3), pp. 135–138. DOI: https://doi.org/10.1016/S0378-8741(02)00364-1. DOI: https://doi.org/10.1016/S0378-8741(02)00364-1

Kowalski, R, G Kowalska, and J Wiercinski (2003). “Chemical composition of fruits of three eggplant [Solanum melongena L.] cultivars”. Folia Horticulturae 15, pp. 89–95.

Lester, R and M C Daunay (2003). Rudolf Mansfeld and plant genetic resources; Scriften uz Genetischen Ressourcen (DEU) Sympossium dedicated to the 100th birthday of Rudolf Mansfeld. Ed. by Knupffer, H., and J. Ochsmann. Vol. 22, pp. 137–152.

Mazer, S J, V A Delesalle, and P R Neal (1999). “Responses of floral traits to selection on primary sexual investment in Spergularia marina: the battle between the sexes”. 53, pp. 717–731. DOI: https://doi.org/10.1111/j.1558-5646.1999.tb05366.x. DOI: https://doi.org/10.1111/j.1558-5646.1999.tb05366.x

Meyer, R S et al. (2012). “Phylogeographic relationships among Asian eggplants and new perspectives on eggplant domestication”. Molecular phylogenetics and evolution 63(3), pp. 685–701. DOI: https://doi.org/10.1016/j.ympev.2012.02.006. DOI: https://doi.org/10.1016/j.ympev.2012.02.006

Nimenibo, U and R Omotayo (2019). “Comparative proximate, mineral and vitamin composition of Solanum aethiopicum and Solanum melongena”. NISEB Journal 3, pp. 1–17.

Nyadanu, D and S T Lowor (2015). “Promoting competitiveness of neglected and underutilized crop species: comparative analysis of nutritional composition of indigenous and exotic leafy and fruit vegetables in Ghana”. Genetic Resources and Crop Evolution 62(1), pp. 131–140.DOI: https://doi.org/10.1007/s10722-014-0162-x5. DOI: https://doi.org/10.1007/s10722-014-0162-x

Ogungbenro, S B and T E Morakinyo (2014). “Rainfall distribution and change detection across climatic zones in Nigeria”. Weather and Climate Extremes 5-6, pp. 1–6. DOI: https://doi.org/10.1016/j.wace.2014.10.002. DOI: https://doi.org/10.1016/j.wace.2014.10.002

Osei, M K et al. (2010). “Characterization of African Eggplant for Morphological Characteristics”. Journal of Agricultural Science and Technology 4, pp. 33–38.

Padulosi, S, R Phrang, and F J Rosado-May (2019). “Soutenir une agriculture axée sur la nutrition grâce aux espèces négligées et sous-utilisées: Cadre opérationnel”. In: Rome, Italy: Bioversity International and IFAD, pp. 978–92. URL: https://hdl.handle.net/10568/102463.

Sharmin, D et al. (2011). “”Molecular Characterization of eggplant crosses by using RAPD Analysis””. International Journal of Sustainability and Crop Production 6(1), pp. 22–28.

Sneath, P M and P P Sokal (1973). Numerical taxonomy. The principle and practice of numerical classification. Freeman; San Francisco.

Taher, D et al. (2019). “Sources of Resistance for Two-spotted Spider Mite (Tetranychus urticae) in Scarlet (Solanum aethiopicum L.) and Gboma (S. macrocarpon L.) Eggplant Germplasms”. HortScience horts 54, pp. 240–245. DOI: https://doi.org/10.21273/HORTSCI13669-18. DOI: https://doi.org/10.21273/HORTSCI13669-18

Toppino, L, G Vale, and G L Rotino (2008). “Inheritance of Fusarium wilt resistance introgressed from Solanum aethiopicum Gilo and Aculeatum groups into cultivated eggplant (S. melongena) and development of associated PCR-based markers”. Molecular Breeding 22, pp. 237–250. DOI: https://doi.org/10.1007/s11032-008-9170-x. DOI: https://doi.org/10.1007/s11032-008-9170-x