Frequencies of feet feathering and comb type genes in the nigerian local chicken

Incidence of feet feathering condition, different comb types and the relative frequencies of the genes affecting these conditions were studied in 2030 local chickens. 14.78% of the local chicken surveyed had feathered feet, while 85.22% had non feathered feet. The single comb type was the commonest of the comb type observed in the chickens surveyed. 94.73% of the chickens had single comb, while 3.20% and 2.07% had rose and pea combs respectively. The estimated gene frequency for fish allele affecting feet feathering in the breed was 0.08, while its recessive allele, fih an estimated frequency of O. 92. The P allele for pea comb and the R allele for rose comb had a frequency of O. 02 and 0.01 respectively, while the recessive forms, rand p alleles for single comb had frequencies of 0.99 and 0.98 respectively. These estimated frequencies were found to be significantly different from the expected ratio based on simple Mendelian mode of inheritance of these traits

IMPACT OF THE ARCHITECTURAL DESIGN PROCESS ON STUDENTS PERFORMANCE IN DESIGN STUDIO PROJECTS

Architecture can be seen as a discipline that poses several design challenges from conception to design realization stages. This path by which the idea of an architect is translated from the mind to paper and then birthed to life is known as design process. To solve design problems, architects have to go through a systematic design process, which vary with individuals and groups. In whatever way, this is done, the process determines the output and resulting performances. Hence, this study investigates varying design processes and the impact it has on students’ performances in their design studio courses. This study adopted a survey approach with 300 structured questionnaires distributed in three Schools of Architecture in southwest Nigeria. The Results showed two distinct design process approach by students namely: (i) Students who derive design concept in mind and stick to it from the beginning of the project to the end; and (ii). Students who embark on research with guided relevant key parameters to direct their project. Findings show that students in the latter category perform better in the design studio. Furthermore, the study recommended that the design process approach is important, but the rule of thumb is not a major determinant factor to performance in architectural design studio

Comparative Analysis of Production Efficiency of Government-Assisted and Unassisted Pig Farmers in Lagos State

This study comparatively examined the efficiency of pig production among government-assisted and non-assisted farmers in Lagos State, Southwest, Nigeria. The study was based on primary data obtained in a cross-section survey of 120 pig farmers, 60 each drawn purposively from among the government-assisted (GAPF) and unassisted pig farmers (UAPF) in the state. The data were analysed by descriptive, budgetary and econometric (Stochastic Production Frontier) methods. The study revealed that, most of the pig farmers (67.7% of GAPF and 95.0% of UAPF) are men. Majority of the pig farmers (65.0% of GAPF and 55.0% of UAPF) are within 30 - 50 years age bracket; with as much as 83.3% of GAPF and 60.0% of UAPF, having no more than six years of experience in pig farming. However, most (95.0% of GAPF and 75.0% of UAPF) of the pig farmers had some tertiary education. Budgetary analysis revealed that an average GAPF incurred a total cost of N987,682 in producing N1,360,050 worth of pigs with a net farm income of N372,368 yielding 33.67% rate of returns on their investment during the 2008/2009 production season. His UAPF counterpart incurred a total cost of N727,860 in producing N938,000 worth of pigs with a net farm income of N210,140 yielding 31.73% rate of returns on during the same production season. The technical, allocative and overall economic efficiency estimates computed based on estimated Stochastic Production and Conditional Revenue Frontier models of the two categories of pig farmers revealed that GAPF are generally more efficient (with mean technical, allocative and overall economic efficiency index of 0.66, 0.68 and 0.48, respectively) than their UAPF counterparts (with mean technical, allocative and overall economic efficiency index of 0.53, 0.60 and 0.35, respectively). The differences in the production efficiency of the two categories of farms were found to be as a result of the institutional and infrastructural support received by GAPF which is not available to the UAPF. &nbsp

Assessing genetic diversity and phylogeographic structure of duck (Anas platyrhynchos) in Nigeria using mitochondrial DNA D-loop sequences

In this study, the maternal genetic diversity and phylogenetic relationship of Nigerian duck populations were assessed. A total of 591 base pair fragment of the mitochondrial DNA (mtDNA) D-loop region of 87 indigenous ducks from two populations in Nigeria were analyzed. Seven haplotypes and 70 polymorphic sites were identified. The mean haplotypic and nucleotide diversity were found to be 0.381±0.058 and 0.315±0.155 respectively. The phylogeny revealed two divergent haplotype clades, suggesting two possible maternal lineage in Nigerian duck population, with the most commonly shared haplotype belonging to Mallard ducks (Anas platyrhynchos). Genetic variation within and between populations accounted for 63.32% and 36.68% of the total genetic variation respectively. This study concluded that there was relatively high genetic diversity and differentiation, thus, this information will probably pave way for further evaluation studies, preservation and improvement of Nigerian ducks as genetic resources.Keywords: Genetic Diversity, MtDNA, Nigerian duck, phylogen

Sedimentation, depositional environments, and hydrocarbon potential of the Maastrichtian-Paleocene Araromi Formation, eastern Dahomey (Benin) Basin, southwestern Nigeria

The Cretaceous sediments in southwestern Nigeria are host to one of the largest bitumen deposits in the world. In the current paper, an integrated study on sedimentology, palynology, and applied petroleum geochemistry of the Maastrichtian-Paleocene Araromi Formation was used to determine the depositional environments and hydrocarbon potentials of the formation on the eastern Dahomey Basin. Four sedimentary lithofacies were identified from core samples, namely, lower limestone (F$_{1}$); medium to coarse-grained sandstone (F$_{2}$); lower loosely consolidated sandstone (F$_{3}$); and shale and siltstone (F$_{4}$). Sedimentation in the eastern Dahomey Basin occurred mainly in fluvial and shallow-marine (shelf) environments. The palynological assemblages of the Araromi Formation reflect deposition in coastal through brackish water to shallow shelf environment with periods of localized wind-induced storms. The shale and siltstone samples of the Araromi Formation are characterized by total organic carbon (TOC) values of up to 2.50 wt % and S$_{2}$ (hydrocarbon-generating potential) values ranging from 0.26 to 0.70 mgHC/g rock, indicating poor source rocks. Shales show poor quality and thermally immature organic matter at shallow depth and could neither have generated liquid hydrocarbon nor contributed to the heavy oil occurrence on the bitumen and tar-sand belt of eastern Dahomey (Benin) Basin

Association between Insulin Like Growth Factor-1 (IGF-1) gene polymorphism and carcass traits in improved Nigerian indigenous chickens

The insulin-like growth factor-1 (IGF1) is a key regulator of muscle development and metabolism in birds and other vertebrate. Our objective was to determine the association between IGF1 gene polymorphism and carcass traits in FUNAAB Alpha chicken. Genomic DNA was extracted from the blood of 50 normal feathered birds. At 10 weeks, the birds were slaughtered for carcass traits. Specific primers for chicken IGF1 were used for amplification of a 622 base segment. The amplified gene products were digested with Hinf1 restriction enzyme and the digested fragments were genotyped. Allele frequencies were 52% and 48% for A and B, respectively. Genotype frequencies were 27%, 50% and 23% for AA, AB and BB genotypes, respectively. All carcass traits values and the IGF1 gene polymorphism observed were subjected to analysis of variance and the mean were separated using Duncan Multiple Range Test. The results showed that the occurrence of the polymorphism did not affect all the carcass traits but AB genotypes had the highest carcass traits values than the AA and BB genotypes. The conclusion of this study demonstrated that IGF-1 gene, to some extent, could be a candidate gene that affects carcass traits in Improved Nigerian indigenous chicken.Keywords: IGF-1, PCR-RFLP, indigenous chicke

Selected plasma biochemical parameters in improved indigenous NIGERHYB pigs in Southwestern Nigeria

This study was to assess the biochemical parameters of apparently healthy NIGERHYB pigs and comparison of age and sex related differences in these parameters. One hundred and thirty five NIGERHYB pigs (35 boar, 35 sow, 30 weaned boar piglets and 35 weaned gilt piglets) obtained from intensively managed pig farms in Abeokuta suburbs were screened for parasites. The total protein, albumin, globulin, Na+ and K+ values of apparently healthy ones were determined using standard methods. Data were analysed using descriptive statistics and ANOVA. The total protein, albumin, globulin, Na+ and K+ values showed no significant (p>0.05) differences in both sexes of adult and piglets. However, the mean values of total protein, globulin and K+ were significantly higher in the adult than young. There were significant (p<0.05) differences in mean values of Na+ and K+ in sow, boar and gilt piglets compared to the boar piglets. No significant (p>0.05) age and sex difference evident in the mean HCO3- of young and adult pigs. The relationship between these biochemical parameter and those of other animal species in this environment were discussed

Unveiling the mechanical and dynamical stability to the contribution of transport properties of FeNbSb: A first principle approach

This study adopts first principle calculations to probe the electronic, elastic, vibrational, and transport properties of FeNbSb Alloys. The elastic and phonon properties were deduced to explain the stability and dynamical nature of FeNbSb alloy. Voigt-Reuss-Hill approximation was used for the mechanical properties, Poisson’s ratio for brittleness, while Pugh’s rule was used to estimate the alloy ductility. Besides, the absence of negative frequency revealed the dynamical stability of FeNbSb. Also, the thermal conductivity, electrical conductivity, power factor, and Seebeck coefficient were estimated in terms of energy relative to the Fermi level at 300 K ≤ T ≤ 800 K. The study achieved a power factor of 15 × 1011 μW/cmK2s and a maximum zT of 0.52 at 800 K for FeNbSb. In conclusion, the result of this study suggests that FeNbSb p-type is a suitable material for thermoelectricity