Articles by Author: Mark D Laing

Search results for Mark D Laing

We found 90 results for you
  1. Genetic diversity of maize germplasm lines and implications for breeding <em>Maize streak virus</em> resistant hybrids

    Genetic diversity of maize germplasm lines and implications for breeding <em>Maize streak virus</em> resistant hybrids

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Evaluation of genetic distances between maize inbred lines can be used to maximise heterosis in hybrids. This study was conducted to determine genetic distances among 25 maize inbred lines in the Maize streak virus disease (MSVD) QTL region to develop...
  2. A genetic diversity analysis of South African sorghum genotypes using SSR markers

    A genetic diversity analysis of South African sorghum genotypes using SSR markers

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Diverse landraces of sorghum (Sorghum bicolor (L.) Moench) are widely grown by smallholder farmers in South Africa. The objective of the study was to assess the genetic diversity present in South African sorghum genotypes using genetic distances as measured by...
  3. Phenotypic characterisation of sweetpotato genotypes grown in East and Central Africa

    Phenotypic characterisation of sweetpotato genotypes grown in East and Central Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Identification of genetic variability and interrelationships among germplasm collections is fundamental to select parents with complementary traits for plant breeding programmes. The aim of this study was to characterise and identify breeding parents among 54 sweetpotato genotypes grown in Rwanda,...
  4. Comparative evaluation of commercial rhizobial inoculants of soybean

    Comparative evaluation of commercial rhizobial inoculants of soybean

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Inoculation of soybean seeds with root-nodule bacteria results in a significant increase in nodulation and yield. Two commercial rhizobial inoculants available on the South African market were tested for their efficacy under standardised conditions in a short-term greenhouse experiment. The...
  5. Sorghum production systems and constraints, and coping strategies under drought-prone agro-ecologies of Ethiopia

    Sorghum production systems and constraints, and coping strategies under drought-prone agro-ecologies of Ethiopia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sorghum is one of the most important cereal crops worldwide after wheat, rice, maize and barley. Examining the present socio-economic conditions of sorghum-producing farmers in different agro-ecologies in Ethiopia is of importance for the design of improvement strategies. The objectives...
  6. Key maize production constraints and farmers’ preferred traits in the mid-altitude maize agroecologies of northern Tanzania

    Key maize production constraints and farmers’ preferred traits in the mid-altitude maize agroecologies of northern Tanzania

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Maize productivity in Tanzania is very low, owing to various biotic and abiotic production constraints. Examining production constraints and farmers’ preference in maize-growing agroecologies will assist in designing improvement strategies based on farmers’ priorities. The objective of this study was...
  7. Use of volatile oils of garlic to control the cowpea weevil <em>Callosobruchus maculatus</em> (Bruchidae: Coleoptera)

    Use of volatile oils of garlic to control the cowpea weevil <em>Callosobruchus maculatus</em> (Bruchidae: Coleoptera)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cowpea weevil causes losses of 50–90% in cowpea after harvest. Control has relied on toxic agrochemical fumigants that are no longer available or are dangerous and relatively expensive, making its control difficult for most farmers. This study was initiated to...
  8. Use of a chimeric transgene construct to confer broad resistance in zucchini (<em>Cucurbita pepo</em> L.) plants against cucurbit-infecting potyviruses occurring in KwaZulu-Natal, South Africa

    Use of a chimeric transgene construct to confer broad resistance in zucchini (<em>Cucurbita pepo</em> L.) plants against cucurbit-infecting potyviruses occurring in KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The frequent identification of cucurbit-infecting viruses across the province of KwaZulu-Natal (KZN) in South Africa necessitates developing effective methods of controlling these diseases. Putative transgenic baby marrow (Cucurbita pepo L.) plants resistant to Zucchini yellow mosaic virus (ZYMV), Moroccan watermelon...
  9. Selection of drought-tolerant tef (<em>Eragrostis tef</em>) genotypes using drought tolerance indices

    Selection of drought-tolerant tef (<em>Eragrostis tef</em>) genotypes using drought tolerance indices

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Drought stress is one of the major abiotic constraints affecting production and productivity of tef (Eragrostis tef). Genetic resources and selection methodologies are among the prerequisites to improve the efficiency of breeding for drought tolerance. The objectives of this study...