Browsing by Author "Sagaya, A."

Now showing 1 - 5 of 5
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    Comparative evaluation of seed quality and physico-chemical properties of groundnut varieties consumed in Nigeria
    (AAU J. Physical & Applied Sciences, 2025) Olayinka, B. U.; Lawal, A. R.; Abdulkareem, K A.; Kareem, I.; Babatunde, M. O.; Ayinla, A.; Sagaya, A.; Mustapha, O. T.
    Groundnuts have been established to have great health benefits due to their biochemical constituents. Varieties abound, differing in their quality of seed and oil characteristics; hence, the need to continually assess the characteristics of the seeds, most importantly the improved varieties, whose chemical composition and physico-chemical properties are scant in the literature. In this study, the proximate, mineral and physico-chemical properties of five groundnut varieties (KAMPALA, SAMNUTS 23, 24, 25 and 28) were evaluated using standard procedures. The results revealed that crude protein, fat and fibre were higher in SAMNUT23 when compared to other varieties. Aside from ash and carbohydrate, the KAMPALA variety recorded the lowest values of all parameters. Regardless of varietal differences in mineral elements, the seeds were rich in phosphorus, sodium, potassium, and magnesium, compared to other essential elements such as zinc, iron, copper, and nitrogen. However, the mineral elements were significantly higher in SAMNUT varieties when compared to KAMPALA. The physico-chemical properties did not show appreciable differences except for acid value, iodine value and saponification values, which were significantly lowest in SAMNUT28. The findings revealed that all the SAMNUTvarieties, especially SAMNUT23, 24 and 25, had superior quality; hence, their use in seed certification, food processing and breeding programmes within the groundnut value chain in Nigeria should be encouraged.
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    Gas chromatographic-mass spectrometry-based chemotaxonomic profiling of Senna, Cassia, and Albizia species of the Fabaceae family
    (Faculty of Life Sciences University of Ilorin Nigeria, 2026) Sagaya, A.; Lawal, A.L.; Adeniran, S.A.; Okewande, S.A.; AbdulRahaman, A.A.
    Senna, Cassia and Albizia are diverse genera within the Fabaceae family, characterised by complex taxonomy of morphological plasticity and hybridisation. This study employed Gas Chromatography-Mass Spectrometry (GC-MS) to profile the diethyl ether leaf extracts of nine species: Senna alata, C. fistula, S. podocarpa, S. obtusifolia, S. occidentalis, S. siamea, Albizia lebbeck, A. adianthifolia, and A. zygia. A total of 117 phytocompounds were identified across all the species studied, with 28 to 40 identified per species. Alcohols (34.19%) and carboxylic acids (17.95%) were the most prominent compounds. Four compounds: -3,7,11,15-Tetramethyl-2-hexadecen-1-ol, Phytol, 9-Octadecenamide, and n-Hexadecanoic acid- were present in all the species. Similarity indices ranged from 19.61% (S. siamea and S. podocarpa) to 58.62% (S. alata and S. occidentalis). Multivariate analyses revealed distinct groupings, notably the divergence of Albizia lebbeck, which formed a separate cluster characterized by a high abundance of 1-Monolinoleoylglycerol trimethylsilyl ether, Benzeneacetic acid, and 6,10-Dodecadien-3-ol, among other compounds. Conversely, S. podocarpa showed close affinity with Albizia species, defined by their shared abundance of alcohols (n-Nonadecanol-1 and 2-Pentadecyn-1-ol) and sterols (Lupeol and β-Sitosterol). These chemotaxonomic findings complement existing morphological data and provide refined differentiation among closely related species. The study demonstrates the value of GC-MS phytochemical profiling in resolving systematic relationships within Fabaceae.
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    Growth performance of kenaf (Hibiscus cannabinus var. tainung) in relation to sowing depths and soil type
    (Jewel Journal of Scientific Research (JJSR), 2019) Olayinka, B. U.; Abdulkareem, K. A.; Ayinla, A.; Adeniran, A. S.; Adigun, B. A.; Sagaya, A.; Bashiru, B. T.; AbdulBaki, A. S.; Etejere, E. O.
    Kenaf is a non-woody plant that has become one of the important alternative sources of soft fibre material used for packaging materials, paper making and textile. Higher fibre production depends largely on suitable agronomical conditions or practices the plant is subjected to during cultivation. Hence, the need to investigate how different seeding depths and soil types influence the growth performance of the plant. Three soil types (loam, sand and clay) and five sowing depths (0, 1, 2, 3, 4 and 5 cm) were studied. The parameters assessed were germination and growth attributes. The results showed that percentage germination, speed of germination and ability of seeds to germinate were significantly increased when the seeding depth was at 2 cm over other seeding depths. Seeding depth at soil surface and those of 1 cm limited all the germination attributes. All the germination attributes were significantly increased in kenaf seeds sown in loamy soil when compared to the other soil types. The results of growth attributes such as plant height, number of leaves, stem girth, leaf area and above-ground dry weight and yield attributes such as number of capsules per plant, number of seed per capsule and number of seeds per plant followed similar trend as recorded for those of germination parameters. Kenaf seeds planted on sandy soil showed reduction in time of seedling emergence, better growth and yield compared to clay soil. The study concluded that 2 cm seeding depth and well-drained soil such as sandy-loam soil are suitable agronomical practice and condition respectively needed for higher productivity that will hitherto translate to greater fibre production. Therefore, the reliance on fibre producing trees could be reduced if these optimum seeding depth and suitable soil type are used by the farmer in the cultivation of this non-woody plant which has the bulk of its stem filled with soft fibre tissue.
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    Molecular Characterisation of Some Accessions of Corchorus olitorius l.
    (Faculty of Science, Federal University Birnin Kebbi, 2019-12) Abdulkareem, K.A; Sidiq, K.A; Olayinka, B.U.; Lateef, A.A.; Garuba, T.; Olahan, G.S.; Adeyemi, S.B.; Sagaya, A.; Tiamiyu, B.B.; Abdulrahman, A.A.
    Nigeria has several native leafy vegetables that have been neglected. Corchorus olitorius belongs to this group. Genetic diversity was studied in five accessions of the plant using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS - PAGE). The aim was to determine the relationship (differences and similarities) among them. Sixteen polypeptide bands were obtained ranging from 12.29 KDa to 170 KDa indicating variations in the banding patterns of the accessions. The unweighted pair group method with arithmetic algorithm (UPGMA) dendrogram grouped the five accessions into three clusters with four groups showing 60% of the accessions in one group. The greatest similarity (96%) observed was between NGB00196 and NGB00194 while the lowest similarities (32%) NGB00191 and (40%) NGB00187. Adopting this technology can be useful in plant variety identification and registration of new plant varieties. NGB00191 was observed to be distantly related to the other accessions hence could be combined in a breeding programme.
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    Phylogenetic position of Nigerian species of Curcuma longa (Zingiberaceae) in the current infrageneric classification
    (Fountain Journal of Natural and Applied Sciences, 2024) Tiamiyu, B. B.; Lateef, A. A.; Sagaya, A.; Abdulkareem, K. A.; Olayinka, B. U.; Ayinla, A.; Adeyemi, S. B.; Amenu, S. G.; AbdulRahaman A. A.; Mustapha, O. T.
    Curcuma longa L. (commonly known as Tumeric) is the only species of the genus Curcuma found in Nigeria. It is of great economic importance to Nigeria, Africa, Asia, and other parts of the world, where it is widely used for ornamental and medicinal purposes, and as spices in food and beverages. However, the phylogenetic placement of the turmeric plant (C. longa) in Nigeria is far from being fully resolved, hence the need for this study. The rhizomes of turmeric were collected at the Forestry Research Institute of Nigeria, Ibadan, Oyo state. Genomic DNA was extracted, followed by the amplification of the ITS and psbA-trnH regions. Phylogenetic analysis was conducted using the Maximum likelihood method. The result resolved the phylogenetic position of Nigerian species and supported existing subgenera classification into three clades, all with high bootstrap support for the three clades. The result of this study supports the subgenera classification of the genus and further reveals the phylogenetic position of C. longa.