In order to assess the genetic diversity of Roselle (Hibiscus sabdariffa L.) in Nigeria, a survey was undertaken to collect the germplasm of the crop. The survey cut across 56 towns and 20 villages in 17 states including the Federal Capital Territory (FCT). Sixty three (63) farmers were interviewed and 60 accessions of Roselle were collected from them. Results showed that 41.7% of these accessions were having green calyx, while 31.7% were with red calyx. On the other hand, 20.0% of the accessions possessed deep red calyx while only 6.7% have light red and pink calyx. Collections from the North Central, North Eastern, North Western and South Western parts were replicated over states, towns and villages. The highest number of Roselle accessions was collected from Kaduna State (8 accessions) followed by Niger State (6 accessions); Jigawa State (6 accessions) while FCT and Bauchi State have 4 accessions each. This is an indication that these areas have the greatest diversity of the crop genetic resources in Nigeria and the states might be secondary centre of origin of the crop. However, morphological as well as molecular characterizations are required to arrange the Roselle accessions collected into a suitable group; this will eventually provide the raw materials needed for the Roselle improvement programme in Nigeria.

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The morphological characteristics of 12 selected sesame (Sesamum indicum L.) genotypes, from five states in northern part of Nigeria (Kaduna, Niger, Nassarawa, Kogi, and Benue), were evaluated during the 2012 cropping season at the Department of Biological Sciences experimental field, Federal University of Technology, Minna, Nigeria using a randomized block design. The objective of the experiment was to assess the performances of all the selected genotypes based on morphological parameters such as plant height, petiole length, number of leaves/plant, number of branches per plant and leaf surface area per plant. While NG01 had the tallest plants 2 weeks after planting, KG01 and NA01 had the shortest plants. Seven genotypes; (KD, NG-01, NG-02, NA-01, BE-01, KG-01 and KG-02 had positive characteristics (such as higher number of leaves and high number of branches) which could bring about high yield. These findings suggest that some of the genotypes could be potential parents for inclusion in future breeding programmes aimed at improving S. indicum in northern Nigeria.

This study was conducted to determine the incidence of pathogenic with dental caries and antimicrobial susceptibility test of some common dentifrice sold in Kano metropolis. A total of 50 samples were used in this study. The samples were taken using swab from human oral mucosa. The swabs were in incubated at 37 0 Cfor 24h, as well as 48h. Dentifrices were also analyzed for the fluoride, phosphate, nitrite, potassium, chloride, carbonate, sulphate, calcium, sodium, and zinc contents using C: Varian/Cary Win Base Titration method, Gravimetry, and Air/Acetylene method. Of all the isolates, Streptococcus mutans was the most isolated pathogen with 24(30. .2mg/L. In the present study, it has been demonstrated that triclosan containing dentifrice are more effective in the control of pathogenic microorganisms associated with oral cavity compared to non-triclosan containing dentifrice.