Genetic diversity and host-specific genetic distinctness exhibited by Bemisia tabaci (Gennadius) populations infesting pulse crops in India
Keywords:
Black gram, Green gram, mtCOI gene, Phylogenetic analysis, WhiteflyAbstract
The present study investigates the genetic variation in populations of whitefly (B. tabaci) infesting green gram and black gram across various agro-climatic zones of India. Phylogenetic analyses identified three distinct genetic groups: Asia I, Asia II-1 and Asia II-8 with the sequence analysis of specifically a 658 bp region of the mitochondrial cytochrome oxidase I (mtCOI) gene. Black gram populations were exclusively associated with the Asia II-1 group, suggesting host-specific adaptations, while green gram populations exhibited greater genetic diversity spanning all three groups. These findings highlight potential drivers of genetic differentiation, including environmental factors, cropping practices, and agro-ecological conditions. Region-specific associations between genetic groups and agro-climatic zones further underscore the adaptability of B. tabaci populations. The results have significant implications for pest management strategies, emphasizing the need for targeted interventions tailored to specific genetic groups and crops. By linking genetic diversity to host preferences and environmental factors, the study contributes critical insights for sustainable whitefly management in pulse crops.
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