A genotype-by-trait biplot analysis in mungbean (Vigna radiata (L.) Wilczek) genotypes under irrigated and moisture stress conditions

To study the impact of terminal moisture stress, thirty-one genotypes of mungbean were screened under irrigated and moisture stress at pod filling stage during summer 2013–2014 in randomized block design. Mean performance revealed RMG 492 and GVIT-203 as best genotypes under irrigated and moisture stress, respectively. Individual and combined ANOVA revealed significant difference among the genotypes. The genotype-trait (GT) biplot analysis was done using multiple traits for irrigated and moisture stress separately. The polygon view of GT biplot revealed that AKM 9904, IPM-02-19, LGG 528, PUSA VISHAL and RMG 492 in irrigated condition; RMG 492 and GVIT-203 in moisture stress as best genotypes. The genotypes VG-6197A, IPM-02-19, COGG 974, ML 145 and PUSA 9531 under irrigated condition; EC-396117, RMG 492 and VG-6197A under moisture-stress condition are close to ideal genotypes. The harvest index (HI) was identified as the best and stable trait for all genotypes under both irrigated and moisture-stress conditions. The relationship among characters showed that seed yield per plant is positively associated with HI and relative water content under both irrigation regimes. The seed yield per plant and specific leaf area are more discriminative under both conditions, whereas SCMR and chlorophyll content are more representatives under irrigated and moisture stress, respectively. The genotypes RMG 492 and VG-6197A identified in this study could be used in different breeding programs and traits SCMR and harvest index portrayed in this study can be used for screening of moisture-stress tolerance in different selection processes. © 2021, Korean Society of Crop Science (KSCS).