Articles by Keyword: Genetic Improvement

Search results for Genetic Improvement

We found 123 results for you
  1. Silviculture and Genetics of <em>Pinus kesiya</em> for Planting Degraded Pasture Land

    Silviculture and Genetics of <em>Pinus kesiya</em> for Planting Degraded Pasture Land

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    The conifer species, Pinus kesiya Royle ex Gordon, is an important part of the ecology within the indigenous range of South-east Asia as well as in sustainably managed plantations in a number of countries. Planting with the species in Colombia...
  2. Program for the deterministic modelling of genetic gains of tree breeding and seed and clone production strategies

    Program for the deterministic modelling of genetic gains of tree breeding and seed and clone production strategies

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    A deterministic modelling algorithm was developed for the prediction of genetic gains of six breeding and 11 (seed and clone) production strategies. This algorithm can run iteratively over ranges of parameters which affect the genetic gains. These parameters are the...
  3. Genetic Improvement of Timber Yield and Wood Quality in <em>Eucalyptus Grandis</em> (Hill) Maiden

    Item type: Journal Article • Journal: South African Forestry Journal
    Results of a partial diallel progeny test of Eucalyptus grandis assessed at ages 5, 36, 60 and 105 months are presented. Large genetic variations among full-sib families were found for all traits studied, e.g. the mean tree volume per family...
  4. Impact of Wood Quality Assessments on Future Fibre Resources in the Pulp and Paper-making Industry

    Item type: Journal Article • Journal: South African Forestry Journal
    Recent evidence from research in Europe has indicated that individual trees can be sampled for their pulping properties by the removal of small quantities (5–50 g) of wood at about breast height (1,3 m above ground). Work began at Sappi's...
  5. Production of plantlets from tissue cultures of Lotononis, a southern African veld legume<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A simple procedure is described for the production of large numbers of rooted plantlets from callus cultures of Lotononis bainesii Baker. Highest frequency of shoots was obtained from somatic embryos formed in initiation cultures on Murashige & Skoog medium plus...
  6. Application of a model for the identification of maize inbred lines for use in single cross improvement

    Application of a model for the identification of maize inbred lines for use in single cross improvement

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A model for the identification of maize inbred donors which genetically will be best for the improvement of quantitative traits in single cross parents was evaluated using local lines of maize. For this material, the assumption by the model that...
  7. Evaluering en kalibrering van CERES-Maize. 1. Nie-lineêre regressie om genetiese parameters te bepaal

    Evaluering en kalibrering van CERES-Maize. 1. Nie-lineêre regressie om genetiese parameters te bepaal

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die genetiese parameters van die meeste plaaslike mielie cultivars wat as inset van CERES-Maize benodig word, is nog nie bepaal nie. Sodanige parameters kan met behulp van bestaande oesdata en fenologiese datums, uit veldproewe afgelei word. Programmatuur kan gebruik word...
  8. The genetic variability of malt quality and related characteristics in grain sorghum

    The genetic variability of malt quality and related characteristics in grain sorghum

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The inheritance of and relationships between diastatic power, seed texture, steep mass, malt mass, dry malt mass, rate of moisture uptake during malting and percentage moisture of malt were analysed by means of a factorial crossing design, which involved the...
  9. Comparisons of using fitted (calculated) and determined (measured) genetic coefficient G2 in CERES-Maize

    Comparisons of using fitted (calculated) and determined (measured) genetic coefficient G2 in CERES-Maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Genetic coefficients reflect simulated differences in cultivar growth and development. These are not readily available for most South African maize cultivars. They could either be fitted or determined experimentally. This study showed that the determined values of genetic coefficients are...
  10. Genetic relationships amongst macadamia varieties grown in South Africa as assessed by RAF markers

    Genetic relationships amongst macadamia varieties grown in South Africa as assessed by RAF markers

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Macadamia is an important horticultural crop of South Africa, and the major cultivars grown have a wide range of attributes. These cultivars originated from diverse backgrounds, but the genetic relationships between them are unclear. Here we describe new insights into...