Alternaria Blight Of Brassicas: Identification, Characterization, Epidemiology And Management
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Rapeseed and mustard form an important part of the total oilseed
production in India. Among the different biotic stresses which influence
the performance of rapeseed and mustard, Alternaria blight disease
caused by Alternaria brassicae (Berk.) Sacc. is considered as one of the
major yield attributing factor in West Bengal causing considerable
losses to the crop. In view of the potentiality of the disease and its
annual recurrence in unpredictable climatic condition facing off now in
lateritic belt of West Bengal, attempts were made for studying the
Alternaria blight of mustard with a view to get information on the
existing isolates of the pathogen, their potential level of natural
incidence, disease – environmental relationship and to explore the
possibilities of controlling the disease with the help of SAR chemicals,
biological agents and by selecting some resistant cultivars suitable
for this location. An attempt was also made for development of a
probable potent marker in relation to Alternaria blight resistance. RAPD
profile analysis was carried out using different RAPD primers and
extent of polymorphism with each primer was studied. Using the RAPD
derived finger print profiles using selected primers, amplicon size for
susceptible, moderately susceptible, highly susceptible and moderately
resistant genotypes was also determined which formed the baseline for
development of Alternaria blight resistant marker. Cluster analysis
using morphological (epidemiological) traits and RAPD fingerprint
profiles were also found to exhibit parallelism forming an important
aspect of the study undertaken. This book is the final outcome of that
exploratory/scientific research.