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Browsing by Author Ikhajiagbe, Beckley

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  • BB

  • Growth, yield, genetic parameters and random amplified polymorphic DNA (RAPD) of five rice varieties treated with sodium azide and sown under different saline conditions

    • Authors: Ikhajiagbe, Beckley;  Advisor: -;  Participants: Omoregie, Ujomonigho Edomo (2020)

  • Sodium azide treatment significantly reversed the negative effects associated with plant development under saline conditions. Consequently, NaN3 treatment significantly improved growth, yield, and genetic parameters of the rice varieties under high salinity compared with the controls. High heritability values were recorded for number of tillers per plant (78.06%), number of panicles per plant (78.74%), and 100-grain weight (98.15%) indicating the possibility of evolving higher yield variants through selection. Chlorophyll mutations observed were albino, viridis, and striata. The RAPD analyses with primers OPR 02 (5′–CAC AGC TGC C-3′), OPC 04 (5′-CCG CAT CTA C-3′), and OPC 05 (5′–GAT G...
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  • Single-tree influence of Tectona grandis Linn. f. on plant distribution and soil characteristics in a planted forest

    • Authors: Ikhajiagbe, Beckley;  Advisor: -;  Participants: Ogwu, Matthew Chidozie; Lawrence, Adebayo Emmanuel (2020)

  • Single-tree influence of T. grandis was observed in the soil total organic carbon, total nitrogen and soluble phosphorus, where concentrations were higher with 1.5-m radius from the tree than beyond. Moreover, the pH of the topsoil within 1.5 m from the base of the tree was lower (pH 4.4) than beyond 1.5 m from the base of the tree (pH 5.4). Species-specific single-tree effect was also observed on the understory plant distribution likely due to diverse ecophysiological interactions. Within 1.5 m from the tree, plant species abundance, especially of Sida garckeana, Reisantia indica, Momordica charantia and Tridax procumbens were negatively affected. However, the distribution of Eleusin...
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  • Variations in growth and genetic properties of Zea mays L. germinants exposed to cold shock

    • Authors: Ikhajiagbe, Beckley;  Advisor: -;  Participants: Odenore, Vona D.; Ifie, Josiah E.; Umeokeke, Esther O.; Loveniers, Pieter-Jan; Enaruna, Peace I. (2020)

  • Significant growth impairment upon exposure to cold shock corresponding to the length of time of exposure was shown. The length of the prominent root significantly reduced upon exposure to a cold shock from 141.8 mm to as low as 91.4 mm in those plants exposed at 1.5 h. The length of the prominent leaf also significantly reduced from 100.6 mm in the control to between 62.6 and 85.5 mm in low-temperature-exposed plants (p < 0.05), notwithstanding the time of exposure. There were significant reductions in final germination percent in the low-temperature-exposed germinants (35.8–60.5%) when compared to the control (88.5%). The RAPD marker (OPA04) revealed variations in germinated maize s...