Browsing by Author "Tiamiyu, B.B"
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Item Bioclimatic Modeling of Current Geographic Distribution and Future Range Shifts of Selected Edible Mushrooms in Nigeria(Faculty of Life Sciences, Federal University Dutsin-Ma, Nigeria, 2024-03-31) Tiamiyu, B.B; Lateef ,A.A; Ajadi, I; Adeyemi, S.B; Owolabi, P.O; Sagaya, A; Abdulsalam, M; Abdulkareem, K.A; Mustapha, O.TMushrooms, as part of the fungal kingdom, are essential components in nutrient cycling and carbon retention in terrestrial ecosystems. Monitoring the impact of climate change on fungi in their natural habitat is difficult because most species reside below the soil surface. As a result of a few reported occurrence records in Nigeria, we model the species distribution of two edible mushrooms, namely, Pleurotus ostreatus and Macrolepiota procera, using MaxEnt to predict the potential future range shifts under different climate change scenarios. In this study, we have calculated high model performances based on the Area under Curve (AUC) values generated (0.778-0.873). Using this modeling approach, the two species were predicted to have an expansion of their localized fundamental niches, pointing to the influence of precipitation as an important macroclimatic predictor. Highly suitable habitats for the two species were discovered primarily in Southern Nigeria, with less habitat suitability in the North-central Zone in 2050. The predicted models in this study do not tell missing geographical information, which could be achieved through citizen science for occurrence records and biodiversity conservation. However, they may be used to explore potentialities, such as understanding the possible distribution patterns of the two mushroom species in Nigeria. This can serve as a useful baseline to enhance the utilization and conservation efforts of these macrofungi as a result of climate change, habitat loss, and rapid urbanization.Item DNA Barcoding of Vernonia amygdalina using ITS and RPOC 1 Multi Loci Gene Regions(Faculty of Science, Federal University Birnin Kebbi, 2023-12) Abdulkareem, K.A; Elebiyo, P.T; Olayinka, B.U; Tiamiyu, B.B; Kareem, I; Danzaki, M.M; Mustapha, O.TVernonia amygdalina is one of the most well-known plants found in Africa and Asia and the most cultivated species of the genus Vernonia. The knowledge of how living and extinct species are related to one another supports much of evolutionary Biology. Therefore, this study was aimed at carrying out the molecular identification of Vernonia amygdalina using ITS and RPOC1 regions. In this study, the identification and phylogenetic analysis of Vernonia amygdalina was done through amplification of the DNA using ITS and RPOC1 primers. The ITS and RPOC1 sequences were compared with the existing sequences in the NCBI GenBank using BLAST searches then the sequences were aligned and maximum likelihood and parsimony trees were constructed using MEGA11. The result showed that ITS sequence length is 627bp while the RPOC1 sequence is 422bp. The blast result for ITS primer sequence showed 93% - 96% similarity against 6 accessions, 70% - 74% against 8 accessions, 64% - 69% against 6 accessions, and 82% similarity against 1 accession. Whereas the RPOC1 primer sequence gave 96% - 99% similarity against all accessions in the BLAST results. Vernonia amygdalina, Hirpicium diffusum, Cyanthillium cinereum, Sonchus ustulatus, Olearia odorata, and Olearia laxiflora were observed as out groups for their respective trees with the RPOC1 primer producing the highest percentage with all BLAST matches ranging from 96% to 99%. This indicates that the RPOC1 primer produced higher identification to species level.Item Phylogenetic Position of Nigerian Species of Curcuma longa (Zingiberaceae) in the Current Infrageneric Classification(The College of Natural and Applied Sciences, Fountain University, Osogbo, Nigeria, 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.TCurcuma 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.