Screening of Soybean Genotypes against Mungbean Yellow Mosaic Virus Disease under Field Conditions

Abstract

Soybean (Glycine max L.) is a nutrionally enrich leguminous crop, playing a pivotal part in food, feed and industrial sectors. In India it has been escalated owing to high adaptability, nitrogen fixing capability economic returns. However, production is significantly constrained by many biotic and abiotic stresses. Among biotic stresses Mungbean Yellow Mosaic Virus (MYMV) disease is a major viral disease transmitted by whitefly (Bemisia tabaci), leading to chlorosis, stunted growth and severe yield losses. The present investigation aimed to evaluate twelve soybean genotypes for speckled resistance to MYMV under natural epiphytotic conditions during the kharif 2024. The experiment was laid out by using RBD, with 2 replications; Disease severity was scored based on a standardized 0-5 scale, wherein lower scores indicated higher resistance. Sustained variability was evident in disease response, with genotypes categorized as highly resistant, resistant, moderately resistant, moderately susceptible, susceptible and highly susceptible. Genotypes such as KDS 726, KDS 992 and MAUS 162 exhibited moderately susceptible whereas, MAUS 61, MAUS 81 and MAUS 612 showed susceptible against the Mungbean Yellow Mosaic Virus (MYMV). These findings provide a valuable foundation for the development of Mungbean Yellow Mosaic Disease (MYMD) resistant soybean cultivators in future. Future efforts for integrating molecular markers and genomic tools with phenotypic selection may be instrumental in accelerating the development of resilient soybean varieties for sustainable production in MYMV- endemic areas.