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End date: 2015
Whitefly (Bemisia tabaci)-transmitted begomovirus diseases have emerged as major constraints to the production and quality of hot pepper (Capsicum annuum), tomato (Solanum lycopersicum) and mungbean (Vigna radiata) crops in tropical Asia. Currently, there is no reliable treatment to cure a plant of any virus infection. Two complementary control strategies can provide some protection: a) preventing transmission of begomoviruses to the crop by the whitefly vectors, and b) deploying natural resistance to the begomoviruses.
Plant breeders are using marker-assisted selection to incorporate begomovirus resistance into locally preferred tomato, hot pepper and mungbean varieties. Vegetable growers are adopting sustainable, integrated virus and vector management practices, including the use of appropriate resistant varieties. By increasing the land and labor productivity of vegetables through the use of plant disease resistance and disease control strategies that use pesticides less and more appropriately, the project is contributing to improving food security and the promotion of agriculture and rural development, while at the same time protecting the health of consumers and the environment.
- India
- Thailand
- Vietnam
Dr. Ramakrishnan M. Nair (AVRDC – The World Vegetable Center Legume Breeder)
Dr. N. Manikanda Boopathi (Assistant Professor – Bio-Tech), Department of Plant Molecular Biology and Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University
Dr. K. Angappan Associate Professor (Plant Pathology), Department of Plant Molecular Biology and Biotechnology, Centre for Plant Molecular Biology, Tamil Nadu Agricultural University
Taiwan
Dr. Lawrence Kenyon (AVRDC Plant Pathologist/Virologist)
Dr. R. Schafleitner (AVRDC Molecular Biologist)
Dr. R. Srinivasan (AVRDC Entomologist)
Dr. P. Hanson (AVRDC Plant Breeder)
Dr. Andreas Ebert (AVRDC Genebank Manager)
D. Ledesma (AVRDC Biometrician)
Thailand
Dr. Robert Holmer (AVRDC East and Southeast Asia Regional Director)
Dr. Narinder Dhillon, (AVRDC Vegetable Breeder)
Dr. Pissawan Chiemsombat (Plant Virologist), Department of Plant Pathology, Faculty of Agriculture, Kasetsart University, Kamphaengsaen Campus
Dr. Sirikul Wasee (Director, Vegetable Breeder), Tropical Vegetable Research Center, Kasetsart University Kamphaeng Saen Campus
Vietnam
Ms Nguyen Thi Lan Hoa Agro-biodiversity Dept. Plant Resources Center [PRC], Vietnam Academy of Agricultural Sciences
Dr. Ha Minh Thanh, (Senior Researcher Plant Pathology), Plant Protection Research Institute [PPRI], Vietnam Academy of Agricultural Sciences
Dr. Ha Viet Cuong (Plant Virologist), Department of Plant Pathology, Hanoi University of Agriculture
Germany
Dr. Stephan Winter, (Virus Diagnostics and Molecular Virology), Plant Virus Research Division c/o BBA, Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
- In Vietnam, three mungbean accessions were rated as resistant or very resistant to mungbean yellow mosaic disease, with all the other accessions were rated susceptible to very susceptible to the disease. Crosses between these resistant lines and susceptible lines have been initiated in Taiwan and Vietnam and F3 families of one of the crosses were sent to Vietnam for phenotyping in the 2013 season.
- Field screening of hot pepper accessions for resistance/tolerance to begomovirus infection is underway in Vietnam, Thailand and India.
- Fifteen different Solanum genotypes were tested for their ability to support the multiplication of whiteflies. Two accessions were confirmed as being very resistant to whiteflies. So far only a few polymorphic simple sequence repeat (SSR) markers have been identified for use with the hot pepper and mungbean parents most likely to be used in begomovirus disease resistance inheritance studies, so the search for polymorphic markers is continuing.
