Exploring the Genetic Diversity of Macrophomina phaseolina isolates in Soybean Crops: A Study from Madhya Pradesh

Macrophomina phaseolina is a soil-borne pathogen causing significant yield losses in soybean crops, particularly in Madhya Pradesh, India, where soybean is a major agricultural commodity. This study aims to explore the genetic diversity of M. phaseolina isolates collected from infected soybean plants across various regions of Madhya Pradesh. A total of 12 isolates were collected from symptomatic plants displaying signs of charcoal rot. Molecular analysis was conducted using molecular markers such as Random Amplified Polymorphic DNA (RAPD) to assess genetic variability among the isolates. The results elucidated substantial genetic diversity among the isolates, signifying that M. phaseolina populations within this geographical area exhibit a high degree of heterogeneity. Phylogenetic analysis categorized the isolates into discrete clusters, implying the existence of multiple strains with differing pathogenicity levels. This genetic variability may enhance the pathogen’s capability to acclimatize to diverse environmental conditions and host resistance mechanisms, thereby complicating disease management efforts. The genetic diversity of M. phaseolina is integral to formulating effective control strategies, which encompasses the cultivation of resistant soybean varieties and the execution of targeted disease management interventions. This genetic variation may contribute to the pathogen’s ability to adapt to different environmental conditions and host resistance mechanisms, making disease management more challenging. The genetic diversity of M. phaseolina is crucial for developing effective control strategies, including the breeding of resistant soybean cultivars and the implementation of targeted disease management practices. This study provides valuable insights into the population structure of M. phaseolina in Madhya Pradesh, highlighting the need for region-specific approaches to manage charcoal rot in soybean crops.