Association of biochemical traits with Yellow Mosaic Virus (YMV) resistance in F<sub>3</sub> generation of mungbean (<i>Vigna radiata</i> (L.) Wilczek)

Yellow Mosaic Virus (YMV) is one of the most destructive viral diseases in mungbean, significantly affecting yield and quality. The present study aimed to investigate the correlation between key biochemical traits and YMV resistance in an F3 population derived from IPM 2-14 (resistant parent) × GGG 1 (susceptible parent) cross. Disease scoring was performed using a 1–9 scale under natural field conditions. A total of four biochemical parameters viz., total protein, total phenol, total chlorophyll, and tannin content were quantified in selected 10 highly resistant and 10 highly susceptible F3 individuals. Correlation analysis revealed a significant negative association between YMV disease score and all the biochemical traits namely, protein content (r -0.66**), phenol content (r -0.77**), chlorophyll content (r -0.76**) and tannin content (r-0.71**). These results suggests potential role of these biochemical components in conferring resistance. These findings suggest that selection based on these biochemical traits may assist in enhancing YMV resistance in mungbean.