Studies on genetic divergence over stress and non-stress environment in mungbean [Vigna radiata (L.) Wilczek]

Abstract

Thirty six genotypes of mungbean [Vigna radiata (L.) Wilczek] which consisted of both released varieties and advanced lines representing genotypes pre-selected for resistance or tolerance to different stress conditions, maintained at IARI Center for Pulses Improvement, UAS, Dharwad, Karnataka were used for the study. The experiment was carried in three environments involving stress and non-stress conditions to understand the genetic diversity as influenced by the change in environment. These were grown in three distinct rainfed environments: E1 (Recommended dose of fertilizers + plant protection chemicals), E2 (Only recommended dose of fertilizers) and E3 (Fertilizer and pesticide free conditions) at Agricultural College, Dharwad. The characters studied were plant height (PH), branches per plant (BPP), clusters per plant (CPP), pods per plant (PPP), seeds per pod (SIP), 100 seed weight (100 SW), biological yield (BY), harvest index (HI), days to initiation of flowering (DIF), days to 50% flowering (050%F), days to initiation of pod maturity (OIPM), days to 75% pod maturity (075%PM), powdery mildew at 45 (PM45D), 60 days (PM60D) and mung yellow mosaic virus (MYMV)], which were selected because of their association with yield as reported by many authors in their previous studies.