O.J Olawuyi

University of Ibadan · Department of Botany

Lima bean (Phaseolus lunatus Linn.) is one of the important legumes in developing countries. The study was carried out to evaluate the morphological characters and determine the amount of cyanide in lima beans. A total of 15 Lima bean accessions were obtained from the genebank of Genetic Resource Centre, International Institute of Tropical Agricult...

Lima bean (Phaseolus lunatus Linn.) is one of the important legumes in developing countries. The study was carried out to evaluate the morphological characters and determine the amount of cyanide in lima beans. A total of 15 Lima bean accessions were obtained from the genebank of Genetic Resource Centre, International Institute of Tropical Agricult...

Decayed ripened tomato fruit contaminated with spores and toxins with relatively heat resistant could poised food poisoning in humans and animals. This research investigated the effect of antibiotic sensitivity of fungi and bacteria isolated from tomato (Solanum lycopersicum) fruit in Osogbo markets, Nigeria. One hundred decayed fruit of tomato wer...

The roles of biologically synthesized Exopolysaccharides (EPS) from Rhizobium and Arbuscular Mycorrhizal Fungus (AMF) in tolerating biotic and abiotic stresses were investigated in this study. The treatments effect of Rhizobia, Rhizobial-exopolysaccharides ( Bradyrhizobium japonicum USDA 110) and AMF ( Glomus clarum ), singly and in combination wer...

Introduction Bambara groundnut (BG) (Vigna subterranea [L.] Verdc) is an indigenous, resilient, but underutilized leguminous crop that occurs mostly as genetically heterogeneous landraces with limited information on the drought tolerant attributes. This study elucidates the associations between sequencing-based diversity array technology (DArTseq)...

Induced mutation is valuable for creating genetic variability for use in crop improvement programs. However, there are limited information on the mutagenicity of the African Yam bean (AYB). This study investigated the mitotic chromosomes, pollen fertility and morphological response of African yam bean to gamma radiation. Five accessions of AYB (TSs...

This study assessed the phenotypic variability across nine accessions of okra (NGB00350, NGB00303, NGB00396, NGB00322, NGB00356, NGB00326, NGB00345, NGB00463, and NGB00335) obtained from the National Center for Genetic Resources and Biotechnology (NACGRAB). Seeds of the nine accessions were planted in each of the 4 kg bagged soil arranged in comple...

This study was carried out to evaluate the genetic variability and agromorphological variation of thirty sweet potato accessions and selected landraces sourced from the National Root Crops Research Institute (NRCRI), Umudike and local farmers from the six states of South West, Nigeria. The sweet potato were planted on the experimental field of t...

Tomato (Solanum lycopersicum L.), is an economic plant which belongs to Family Solanaceae and is widely consumed as food and other processed natural products. Tomato production areas are faced with economic losses due to early blight disease caused by Alternaria solani. Early blight disease reduce yield and renders fruit unmarketable, Cultural prac...

The relationship among fungi associated with whole and rotting Solanum lycopersicum L., and two capsicum species was examined. Whole (healthy looking) and rotting vegetable fruits (Solanum lycopersicum L., Capsicum annum L. and Capsicum chinense) were obtained from three different units within two markets (Atakumosa and Bodija) in two different sta...

Odeniyi OA, Olawuyi OJ, Ogunsanya O, Unuofin JO. 2022. Occurrence of common core structure and genotype-specific signatures among the Vibrio of environmentally diverse vended crabs and shrimps from selected Lagos seafood markets, Nigeria. Biodiversitas 23: 3081-3090. This study investigated the occurrence of Vibrio species from the gastrointestinal...

Mango is one of the edible tree crops cultivated globally. Therefore, this study investigated the variation among 36 accessions of mango collected from genebank and selected locations in Oyo State, Nigeria. The field experiment was conducted in a Complete Randomized Design (CRD) with three replicates. A total of 17 quantitative and 43 qualitative c...

This study characterized five (5) varieties of mango comprising 15 accessions collected from Ogbomosho, Saki, Ibadan and other locations in Oyo State. The field experiment was laid out in a Complete Randomized Design (CRD) with three replicates. Morphological characters were assessed on the stem, leaf and fruit. Also, Molecular studies (DNA amplifi...

The infestation of maize by Fall armyworm (FAW) causes serious damage and susceptibility to fungal pathogens. These pathogenic fungi can cause deterioration and yield loss to farmers' maize both on the field and in storage. The study was therefore conducted to access the incidence of ear rot fungi of maize from Ekiti and Abia states associated with...

Red flower rag leaf (Crassocephalum crepidioides) is one of the underutilized vegetables consumed globally. Pot trials were conducted to characterize 15 morphologically distinct accessions of C. crepidioides and assess the effects of treatment combinations of eggshell, NPK 15:15:15, poultry manure and arbuscular mycorrhizal fungus(Glomus mosseae) a...

Arbuscular mycorrhizal fungus (AMF, Glomus clarum) has been used widely as a bio-amendment and bio-control agent in several biotechnological studies. In this study, biofortification of maize with provitamin A using AMF was investigated. Five maize varieties (V1 = white drought-resistant maize, V2= yellow provitamin A maize, V3= white drought-tolera...

Ten genotypes of maize collected from National Center for Genetic Resources and Biotechnology (NACGRAB) were induced with X-ray for morphological and molecular assessment. The experimental design was complete randomized design with four replicates. Morphological and molecular statistical analyses of treated genotypes were conducted using SAS and Po...

Background: Pearl millet is a staple food globally for man, livestock, and as a source of fuel and construction materials. Therefore, the mutagenicity due to exposure of soil, plants, and animals to lead nitrate necessitated this study. Objective: This study aimed at investigating the mutagenic effect of lead nitrate on morphological characters, g...

The in vitro assay of the leaf extracts of selected botanicals was carried out to assess the inhibitory potentials of the extracts on fungal growth, seed germination, seedling growth characters and frequency of seed-borne fungi. selected plants include: Azadirachta. indica, Moringa oleifera, Vernonia amygdalina, Tithonia diversifolia and Carica pap...

African yam bean is a diploid species of the genus Sphenostylis with variation in chromosome number (aneuploidy). Despite the reported variations, there's need to screen for other variations in chromosome number. Therefore, this study investigated the occurrence of aneuploidy in germplasm of AYB using combination of mitotic and pollen data. The mit...

Maize ear rot caused by Fusarium verticillioides (Fv) is a major disease associated with reduced grain yield and ear quality. The use of biochar in management of ear rot has not been established. Efficacy of biochar against the disease was therefore investigated. Efficacy of biochars produced from poultry faecal waste (Bpw) and sawdust (Bsd) agains...

This study assessed the phenotypic variability across nine accessions of okra. (NGB00350, NGB00303, NGB00396, NGB00322, NGB00356, NGB00326, NGB00345, NGB00463, and NGB00335) obtained from the National Center for Genetic Resources and Biotechnology (NACGRAB). Seeds of the nine accessions were planted in each of the 4kg bagged soil arranged in comple...

Maize ear rot caused by Fusarium verticillioides (Fv) is a major disease associated with reduced grain yield and ear quality. The use of biochar in management of ear rot has not been established. Efficacy of biochar aganst the disease was therefore investigated. Efficacy of biochars produced from poultry faecal waste (Bpw) and sawdust (Bsd) against...

This study focused on characterization of common Fusarium strains causing ear rot disease of maize and potentials of controlling them using arbuscular mycorrhiza (Glomus clarum Nicol. & Sch. and G. deserticola Trappe, Bloss & Menge). Maize ear showing rot symptoms were obtained from ten (10) different farms in Osun State, Nigeria using random sampl...

Introduction: Maize is an important cereal grown globally across wide range of altitude and latitude. Temperature is one of the factors that affect the viability of maize under storage conditions. Aim: This study, therefore, assessed the effect of different temperature storage levels on the morphological characters and molecular variability of maiz...

Aims: This study investigated morphological characterization of eighty accessions of Dioscorea burkilliana obtained from the Genetic Resources Center of International Institute of Tropical Agriculture (IITA) Ibadan, Nigeria. Study Design and Methods: The experimental field was laid out in a complete randomized design with three replicates on plots...

This study established phylogenetic relationships among mango varieties collected from NIHORT, Ogbomosho, Saki, Oyo, Isehin and Ibadan using Simple Sequence Repeat (SSR) markers with a view of determining their polymorphism, gene and allelic diversities. Sweet Mango UI Acc-3 had the highest total genomic DNA of 1379.00µl, while OYOM ACC-5 had the l...

Malaria is a global menace that claimed many lives. The potential of mushroom at appropriate dosage, concentrations and suitable condition especially as antiplasmodial agents against malaria is important. Therefore, this study investigated the interactive effects of some fungi extracts (Pleurotus tuber-regium, Pleurotus pulmonarius, Fomes lignosus,...

The variability of in vitro regeneration and proliferation of maize genotypes POOLISSRQPMX, DTSR-WCO, TZLCOMP4C3, TZE COMP 3C2, EV99QPM, POP66 SR/ACR94-YQPM, DTSR-WC, SAMMAZ 19S-14DT and TZEE-YPOPSTRC4 was investigated. Explants were regenerated through direct organogenesis using 0.1 mg/l NAA + 2.0 mg/l BAP, 0.1 mg/l NAA + 2.0 mg/l KIN, 0.3 mg/l NA...

The preventive abilities of some Nigerian higher fungi; Pleurotus pulmonarius, Fomes lignosus, Lentinus subnudus, Termitomyces robustus, Pleurotus tuber-regium collected from wood substrates, and the combined extracts (40 mg/mL) were studied against malaria parasite, Plasmodium berghei berghei to exploit them as medicinal agents. The fruit bodies w...

Aim: This study investigated the molecular variability among accessions of Ocimum gratissimum from selected states in Nigeria and Mali using RAPD marker. Study Design: The experimental design was complete randomized design (CRD) with three replicates. Materials and Methods: Twenty accessions of Ocimum gratissimum were collected from nineteen select...

Mushrooms are consumed for their flavor, aroma, nutritive and medicinal values. The basis of this study is to boost protein production for human consumption. Studies were conducted to investigate the growth and yield of Pleurotus tuber-regium (Fr) Singer on four sawdust types derived from mango, cassia, neem and their mixed bed. The treatments cons...

Aims: This study was conducted to investigate the effect of liquid effluents discharged from a nonalcoholic beverage company on the growth of maize genotypes. Study Design: The screenhouse experiment was laid out in complete randomised design. Place and Duration of Study: The experiment was conducted at the nursery farm of the Department of Botan...

The ineffective control measures of pathogens is due to variability among their populations. Hence, the study of pathogenic variation of Fusarium verticillioides strains on maize genotypes. Six F. verticillioides infected maize ear were randomly obtained from three agro-ecological zones in Southwest Nigeria. Pathogenicity of F. verticillioides stra...

Biocontrol Potentials of Arbuscular Mycorrhizal Fungi Suppression of against Fusarium verticillioides of Maize Ear rot.

The protection of plants from pathogens results to better performances in growth and yield characters. Therefore, the efficacy of Glomus clarum and G. deserticola as biocontrol agents against Fusarium verticillioides (AKR 05, ILR 06 and ERW 05) strains on maize T2L COMP.4 was investigated. Concentration 10 g (20 spores), 20 g (48 spores) and 30 g (...

The polyploidy expressions of colchicine mutagen at concentrations of 0.05%, 0.1%, 0.15%, 0.2%, 0.3%, 0.5% and 0.7% were investigated on maize genotypes. The in-vitro and field experiments were carried out at the Genetics and Molecular Biology laboratory and Research Farm of the Department of Botany, University of Ibadan, Nigeria. The concentration...

The polyploidy expressions of colchicine mutagen at concentrations of 0.05%, 0.1%, 0.15%, 0.2%, 0.3%, 0.5% and 0.7% were investigated on maize genotypes. The in-vitro and field experiments were carried out at the Genetics and Molecular Biology laboratory and Research Farm of the Department of Botany, University of Ibadan, Nigeria. The concentration...

The ineffective control measures of pathogens is due to variability among their populations. Hence, the study of pathogenic variation of F. verticillioides strains on maize genotypes. Six F. verticillioides infected maize ear were randomly obtained from three agro-ecological zones in Southwest Nigeria. Pathogenicity of Fusarium verticillioides stra...

ATP-binding cassette (ABC) transporters are the largest and most ancient family of transmembrane proteins with representatives in all phyla from prokaryotes to humans. Systematic searches were performed using PSI-Blast program on NCBI to identify sorghum ABC transporters. The identified proteins were subjected to phylogenetic and domain topology an...

Abstract The molecular and genetic assessments of the seeds of five Amaranthus genotypes in four treatment combinations of Arbuscular mycorrhiza Fungus (Glomus clarum) and Green manure (Leucaena leucocephala) were evaluated using SSR maker with four primers. The experiment was laid out in a complete randomized design with four replicates. Heritabi...

Abstract: The field experiment was conducted to evaluate the heritability, genetic variance, agro-morphological and yield characters of Sixteen Amaranthus genotypes. The seeds of the sixteen (16) genotypes of Amaranthus evaluated in this study were; NG/AA/MAY/09/027, NG/AA/03/11/010, NG/AO/11/08/042, NG/AO/11/08/039, NG/SA/DEC/07/0423, NG/SA/DEC/07...

Screen house experiments were conducted at the Institute of Agricultural Research and Training, Ibadan, on a sandy loam soil in two years, to assess the effect of arbuscular mycorrhizal fungus (Glomus clarum) and compost (sunflower) on the growth and yield of tomato plants. The experimental design was laid out in a Complete Randomized Design (CRD)...

Screen house experiments were conducted at the Institute of Agricultural Research and Training, Ibadan, on a sandy loam soil in two years, to assess the effect of arbuscular mycorrhizal fungus Glomus clarum) and compost (sunflower) on the growth and yield of tomato plants. The experimental design was laid out in a Complete Randomized Design (CRD) w...

The influence of Arbuscular mycorrhiza fungi (AMF) (Glomus deserticola and Gigaspora gigantea) were evaluated on drought tolerance and charcoal rot disease of cowpea genotypes: IT90K-277-2, IT84S-2246-4 and IT06K123-1. IT90K-277-2 and IT84S-2246-4 were sown in 3kg of sterilized soil for drought experiment with five treatments. Treatment was establi...

The response of five varieties of pepper was investigated at the research farm of the Department of Botany, University of Ibadan. Five treatments of Glomus deserticola (AMF), poultry manure (PM), Pleurotus pulmonarius (SMC) were inoculated into 5 kg of sterile soil in poly pots, while uninoculated served as control. The treatment and varieties prod...

This study investigated the characterization of Fusarium verticillioides strains using Amplified Fragments Length Polymorphism (AFLP) EcoR1-G/ Mse1-C primer combination. This was done to determine the amount of genetic variability present in F. verticillioides population. The objective of this study is to carry out molecular characterization of F....

Many fungi were able to degrade/mineralize hydrocarbons in polluted soils after a long-term exposure, this they do mostly through the secretions of different enzymes such as catalases, peroxidases, laccases, and so on. This study therefore investigated the response and tolerance of a newly identified Trichoderma harzianum to crude oil pollution and...

This study was carried out in Osogbo township of Osun State, Nigeria to isolate and determine prevalence and pathogenicity of microorganisms associated with deterioration of sweet orange fruits. Twenty samples of 20 infected and 20 non-infected sweet oranges (Citrus sinensis L) were collected from four open markets (Akindeko, Igbonna, Oja-Oba and S...

This study identifies the best cultural conditions and nutritional requirements for the selected fungi species isolated from cocoa beans for production of α-amylase and this was studied in 250ml Erlenmeyer flasks. Six different fermentation media (M1–M6) of different compositions were evaluated for this purpose. The medium containing M5 medium (g/l...

Sixteen genotypes of maize were evaluated for genetic variability and character associations in the Research Farm of the Department of Botany, University of Ibadan, Nigeria for 90 days in the 2012, 2013 and 2014 cropping seasons. Perforated polythene bags (18 × 9 cm) were filled with 6kg sandy-loam soil and were spaced at a distance of 10 cm apart...

Genetic characterization of morphological and yield traits in ten genotypes of Celosia argentea L. was evaluated at the Research Farm of the Department of Botany, University of Ibadan, Nigeria. The experiment was laid out in a randomized complete block design with four replicates. The results of analysis of variance carried out on early morphologic...

Ultraviolet (UV) light has strong genotoxic effect to induce mutations for developing high genetic variability in yields, early maturity and other characters in crops. The study investigated the mutagenic effects of UV radiation on growth, yield, agronomic and mutation tolerance of six maize cultivars. Maize seeds were exposed to UV radiation, and...

The proximate and microbial evaluation of Kilishi, a West African dried meat product was carried out in this study, samples collected from three major cities in Nigeria were evaluated from May-November 2013. The data were subjected to analysis of variance using SPSS version 16, while means were separated using Duncan Multiple Range Test at P<0.05....

The molecular variability of ten genotypes of Celosia argentea seeds collected from National Institute of Horticultural Research (NIHORT) and National Centre for Genetic Resources and Biotechnology (NACGRAB) germplasms were evaluated using the Amplified Fragment Length Polymorphism (AFLP) marker. The polymorphism of C. argentea was detected within...

This study was carried out to isolate and identify pathogenic microorganisms associated with deterioration of tomato fruits. Fruit samples of infected and non-infected tomatoes were collected from two open markets, Oja-Oba and Sabo in Osogbo, Nigeria. Each of the tomato was cut and the liquid content inoculated on nutrient agar and potato dextrose...

The ethanol extracts of Ficus asperifolia, Mormordica charantia, Anacardium occidentals and Psidium guajava were evaluated sole and in treatment combinations at 25, 50 and 75mg ml-1 concentration levels against the mycelial growth of Macrophomina phaseolina of Cowpea. The pathogen was cultured on plates containing botanicals amended Potato Dextrose...