Browsing by Author "Magomere, Kinguye Masamaki"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Effects of soil pH levels on iron and zinc concentrations of common bean (Phaseolus vulgaris L.) genotypes
    (African Journal of Agricultural Research, 2024-07) Magomere, Kinguye Masamaki; Nchimbi-Msolla, Susan; Tryphone, George Muhamba
    Plants grown in acid soils experience a variety of stresses which include aluminium, hydrogen and/or manganese toxicity, as well as nutrient deficiencies of calcium and magnesium. A study was carried out to determine the influence of soil pH levels on iron and zinc concentrations in leaves and seeds of twenty-five common bean genotypes. Plastic cups trial was carried out in the screen house to determine the actual amount of quick lime Ca(OH)2 required to reach a targeted soil pH level. In each pot, 4 kg soil was amended with Ca(OH)2 to obtain the target soil pH levels of 5.3, 5.5, 6.5 and 7.5. The experimental design followed a randomized complete block design in a split plot arrangement with three replications per treatment. The pH levels were treated as main factor and genotypes as sub plot. Data collected include leaf iron concentration, seed iron concentration, leaf zinc concentration, and seed zinc concentration and analysis of variance was performed for all data using GenStat statistical package 15th edition. The result demonstrated that soil pH affects absorption of micronutrients directly or indirectly by affecting the nutrients availability to common bean plants.
  • Thumbnail Image
    Item
    Genetic parameters estimate of iron and zinc nutrients in common bean genotypes
    (African Journal of Agricultural Research, 2024-06) Magomere, Kinguye Masamaki; Nchimbi-Msolla, Susan; Tryphone, George Muhamba
    There is need to know the heritability of different traits for the effective selection of parents for future breeding activities. A study was carried out to determine heritability of iron and zinc in common bean. Crosses were made with each donor and recipient parents to obtain four different types of crosses. Part of the F1 seed from each cross was sown in the screen house to produce F2 seeds and also backcrossed to both parents. Heritability was estimated using backcross method for high broad sense heritability and narrow-sense heritability. Broad sense heritability for progenies of NUA 11 × Zawadi (56%), NUA 11 × Pesa (76%), NUA 17 × Zawadi (57%) and NUA 17 × Pesa (59%) were obtained. Narrow sense heritability estimates for progenies of NUA 11×Zawadi, NUA 11 × Pesa, NUA 17 ×Zawadi and NUA 17 × Pesa were 65%, 71%, 79% and 63%, respectively. Genetic advance (GA) values for NUA 17 × Zawadi, NUA 11 × Pesa, NUA 17 × Pesa and NUA 11 × Zawadi was 35, 12.3, 3.5 and 1%, respectively. This study demonstrates that there is a potential for improvement of concentration of iron and zinc in common bean genotypes. Therefore, selection of a superior genotype on the basis of its phenotypic performance, heritability of traits could be well exploited.