held in Hazyview, Mpumalanga Province
South Africa
September 9th - 11th 1997
Under the auspices of the
TUESDAY 1997-09-09
Chairperson: Prof EP Rybicki
Welcome - EP Rybicki
Guest speaker - I Jarvie (PANNAR Pty (SA) Ltd) - Staying competitive in today's agriculture.
Opening address - GDJ van Rensburg - The 1970's streak disease epidemic and subsequent vector studies. '
Plenary - IW Buddenhagen and NA Bosque-Perez - Historical overview of concepts and outcome of breeding for durable, non-strain specific resistance to maize streak virus for tropical Africa.
SESSION 2- BREEDING AND EVALUATION
Chairperson: Prof IW Buddenhagen
JG du Plessis (Presented by J Magson) - The Vaalharts composite as a source of streak resistance.
KV Pixley, DC Jewell, A Schechert and G WeIz - Recent maize streak disease research at CIMMYT-Zimbabwe.
SESSION 3 - BREEDING AND EVALUATION (continued)
Chairperson: Dr K Pixley
JM Fajemisin and JG King - Combining maize streak resistance with resistance to other major stresses in West and Central Africa: Experiences and Challenges.
D Martin and EP Rybicki - Use of a simple image analysis system for the quantitation of maize streak virus symptoms.
M Denic - Simultaneous selection in maize for resistance to streak virus and downy mildew.
Chairperson: Dr M Boulton
EP Rybicki, J Willment, FL Hughes, G Napier, H Jones, S Hall and MB von Wechmar - Studying the diversity of maize streak virus.KE Palmer and EP Rybicki (Presented by EP Rybicki) - Maize streak virus as a gene vector
WH Schnippenkoetter, F Hughes, D Janics, M Fyvie, MB von Wechmar and EP Rybicki - The use of agro-infectious constructs to investigate recombination between distinct strains of South African subgroup 1 geminivirus.
SESSION 5 - VIROLOGY (continued)
Chairperson: Prof J Thomson
M Isnard, M Granter, R Frutos, B Reynaud and M Peterschmitt (Presented by M Peterschmitt) - The quasi-species nature of thc maize streak virus DNA.
JA Willment, KE Palmer and EP Rybicki - Molecular investigations of the intergenic region of maize streak virus.
E van der Walt, KE Palmer and EP Rybicki - Investigation of the movement and coat proteins in infectious chimaeras of maize streak virus.
WEDNESDAY 1997-09-10
SESSION 6 - BREEDING AND EVALUATION (Continued)
Chairperson: Dr J van den Berg
MJ Caulfield - Genotype reaction to streak and mottle virus in maize.
JBJ van Rensburg - Agronomic evaluation of streak resistant maize germplasm.
M Gethi1 K Gathama and JN Gitari - EFFECT OF MANAGEMENT PRACTICES ON MAIZE STREAK DISEASE INFECTION AND DEVELOPMENT
SESSION 7 - BREEDING AND EVALUATION (continued)
Chairperson: Dr N Bosque-Perez
BC Flett, W du Toit and and J van den Berg - TOLERANCE AND RESISTANCE OF MAIZE (Zea mays) HYBRIDS NATURALLY INFECTED WITH MAIZE STREAK VIRUS
J van den Berg and BC Flett - THE USE OF YIELD POTENTIAL IN RECOMMENDING HYBRIDS WITH RESISTANCE TO MAIZE STREAK DISEASE AND STEM BORERS
WG Nhlane - GENETIC ANALYSIS OF MAIZE STREAK VIRUS DISEASE IN MAIZE
J Dintinger, A Pernet, A Rodier, B Reynaud and J Marchand - A complete resistance to Maize Streak Virus originating in Mascarene germplasm. inheritance and gene mapping.
SESSION 8 - BREEDING AND EVALUATION (continued)
Chairperson: Mr BC Flett
J Njuguna, DT Gordon and R Louie - Resistance breaking strains of maize streak geminivirus in Kenya.
B Beck - The occurrence of maize streak virus in the South East Lowveld of South Africa.
J Dintinger, B Reynaud, P Letourmy, JL Marchand and M Peterschmitt - A multilocation variety trial in Africa to evaluate efficiency and stability of complete resistance to MSV originating in La R6union.
L Bigarre', M Granier, B Reynaud, M Nicole and M Peterschmitt - In situ localisation of maize streak virus in a susceptible cultivar and a resistant line.
T Legavre, E Guiderdoni, M Peterschmitt, N Michaux-Ferriere and C Teisson (Presented by M Peterschmitt)- Leftward transcuptional activity of the maize streak virus promoter: Vascular Tissue Specificity in transgenic rice.
G Mazithulela - The Genetic Engineering of African Maize for MSV-Resistance
P Ngwira, DM Bisari and DT Gordon - Nucleotide sequences of the genomes of biological distinct maize streak geminivirus (MSV)-isolates.
B Reynaud - ELECTRICAL PENETRATION GRAPH FROM Cicadulina mbila AND ITS APPLICATION IN PLANT BREEDING TO SCREEN A POTENTIAL RESISTANCE OF MAIZE TO MSV TRANSMISSION
SESSION 10 - CONCURRENT SPECIALIST WORKSHOPS:
1. Virology (Chairperson: Prof EP Rybicki)
2. 1PM (Chairperson: Mr M Caulfield)
Visit to Burgershall trials and demonstration plantings.
THURSDAY 1997-09-11
Chairperson: Prof EP Rybicki
M Boulton, T Heckel and JW Davies - Towards an understanding of the molecular basis of pathogenicity of maize streak virus.
JA Thomson, EP Rybicki, S Lennox and W Chen - Development of transgenic maize resistant to maize streak virus.
T Mangwende, KE Palmer, E Rybicki and JA Thomson - Inhibition of maize streak virus replication in Black Mexican Sweetcorn Suspension Cells by various maize streak virus-derived genetic constructs.
P Ngwira, DM Bisaro and DT Gordon - Analysis of the genetic diversity of maize infecting streak gemini viruses and identification of an MSV signature sequence.
SESSION 12 - VECTOR STUDIES AND EPIDEMIOLOGY
Chairperson: Dr JBJ van Rensburg
NA Bosque-Perez and IW Buddenhagen - STUDIES ON BIOLOGY OF CICADULINA LEAFHOPPERS AND EPIDEMIOLOGY OF MAIZE STREAK VIRUS DISEASE IN WEST AFRICA
B Jonker and BC Flett - A preliminary studly of' seed transmission of maize streak virus in maize.
W Page - VECTOR BEHAVIOUR IN RELATION TO MAIZE STREAK VIRUS EPIDEMIOLOGY AND POSSIBLE ANTIXENOSIS IN MAIZE