Articles by Keyword: Genetic Parameters

Search results for Genetic Parameters

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  1. 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...
  2. Selection of <em>Corymbia citriodora</em> for pulp productivity

    Selection of <em>Corymbia citriodora</em> for pulp productivity

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Evaluation of a series of spotted gum (Corymbia citirodora) progeny trials, established in the subtropical region of Queensland, Australia, was undertaken to provide information for the development of advanced-generation breeding populations suitable for pulp production. Measurements of growth at two...
  3. Genetic characterisation of a <em>Eucalyptus nitens</em> base breeding population in South Africa

    Genetic characterisation of a <em>Eucalyptus nitens</em> base breeding population in South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    The measurement and statistical analysis of data from eight Eucalyptus nitens trials, established in the summer rainfall forestry region of South Africa during the 1980s and 1990s, have enabled the characterisation of the Institute for Commercial Forestry Research's breeding population...
  4. Advances in reproductive biology and seed production systems of <em>Eucalyptus</em>: the case of <em>Eucalyptus globulus</em>

    Advances in reproductive biology and seed production systems of <em>Eucalyptus</em>: the case of <em>Eucalyptus globulus</em>

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Eucalyptus globulus is the main eucalypt species grown in Australian plantations. The focus on seedling deployment systems, coupled with exploitation of large, open-pollinated base populations for breeding purposes over the last two decades, has required a detailed understanding of the...
  5. Evaluating the inheritance of <em>Ceratocystis acaciivora</em> symptom expression in a diverse <em>Acacia mangium</em> breeding population

    Evaluating the inheritance of <em>Ceratocystis acaciivora</em> symptom expression in a diverse <em>Acacia mangium</em> breeding population

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    A dramatic rise in the incidence of a serious canker and wilt disease of Acacia mangium has led to the replacement of thousands of hectares of plantation forests in eastern Sabah. A disease screening program was initiated to evaluate levels...
  6. Estimates of genetic parameters and genetic gains for growth traits of two <em>Eucalyptus urophylla</em> populations in Zululand, South Africa

    Estimates of genetic parameters and genetic gains for growth traits of two <em>Eucalyptus urophylla</em> populations in Zululand, South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    In South Africa, Eucalyptus urophylla is an important species due to its disease tolerance to fungal diseases such as Crysoporthe austroafricana and the Coniothyrium sp. cankers. It is mainly planted as a parental species in a hybrid combination with E...
  7. Genetic variation in growth and wood-quality traits of <em>Corymbia citriodora</em> subsp. <em>variegata</em> across three sites in south-east Queensland, Australia

    Genetic variation in growth and wood-quality traits of <em>Corymbia citriodora</em> subsp. <em>variegata</em> across three sites in south-east Queensland, Australia

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Ten growth or wood-quality traits were assessed in three nearby Corymbia citriodora subsp. variegata (CCV) open-pollinated family-within-provenance trials (18 provenances represented by a total of 374 families) to provide information for the development of a breeding program targeting both pulp...
  8. Genetic parameters for large white pigs reared under intensive management systems in Kenya

    Genetic parameters for large white pigs reared under intensive management systems in Kenya

    Item type: Journal Article • Journal: East African Agricultural and Forestry Journal
    A lack of performance parameters is one of the factors limiting the implementation of sustainable breeding strategies for the pig industry in Kenya. The objective of this study was to estimate genetic and phenotypic parameters for growth performance of Large...
  9. Realised genetic gains and estimated genetic parameters of two <em>Eucalyptus grandis</em> × <em>E. urophylla</em> hybrid breeding strategies

    Realised genetic gains and estimated genetic parameters of two <em>Eucalyptus grandis</em> × <em>E. urophylla</em> hybrid breeding strategies

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Conventionally, Eucalyptus grandis × E. urophylla (GU) hybrid material is first tested as seedlings in progeny trials for at least four years before ortets are selected and ramets of the selected ortets are propagated to test in clonal trials. The...
  10. 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...