Conventional breeding for resistance to whitefly-transmitted geminiviruses
نویسنده
چکیده
The whitefly Bemisia tabaci Genn. is a pervasive pest and vector of plant viruses. The existence of B. tabaci biotypes and numerous whitefly-transmitted geminiviruses (begomoviruses) affecting food and industrial crops, has become a major constraint to agricultural development in tropical and subtropical regions of the world. The predominant whitefly and begomovirus method of control has been the application of insecticides. The excessive use of agrochemicals over the past decades, has resulted in an exponential increase in B. tabaci populations and incidence of begomoviruses transmitted by this whitefly vector. Under these conditions, biological and integrated whitefly/geminivirus control practices have not met expectations. Incorporating begomovirus resistance in a relatively small number of crops improved by conventional plant breeding methods has been a sustainable and efficient disease control strategy. This review discusses some of the conventional intraand inter-specific hybridization strategies followed to incorporate genetic resistance to begomoviruses in three major crops: cassava, common bean and tomato.
منابع مشابه
Tomato Breeders Roundtable 2001 1
Introduction The whitefly Bemisia tabaci Genn. (Homoptera:Aleyrodidae) has caused millions of dollars worth of crop losses in tropical and subtropical agricultural regions in the five continents of the world (Brown, 1994). Besides the direct damage caused by B. tabaci (plant nutrient loss; physiological disorders; honey dew excretions, etc), the sweet potato or cotton whitefly is an efficient v...
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