Ravi Kumawat, Dhirendra Singh, Kana Ram Kumawat, Madhu Choudhary and Sarla Kumawat
Drought and moisture stress is the most limiting factor affecting growth and productivity of crop plants. In order to study the response of thirty genotypes of coriander to drought stress, an experiment was conducted in RBD with three replications under two environments namely, (i) normal condition (E1) and (ii) limited moisture condition (E2) during rabi 2016-2017 at Agronomy Farm, S.K.N. College of Agriculture, Jobner. Eight drought tolerance indices including stress tolerance (TOL), stress susceptibility index (SSI), stress tolerance index (STI), mean productivity (MP), geometric mean productivity (GMP), yield index (YI), stress susceptibility percentage index (SSPI) and modified stress tolerance index (MSTI) were calculated based on seed yield under moisture stress (Ys) and non-stress condition (Yp). The pooled analysis of variance revealed significant differences among the environments, genotypes and G x E interactions for seed yield per plant (g). The seed yield under non-stress condition (Yp) had significant and positive association with TOL, STI, MP, GMP, YI, SSPI, K1STI and K2STI and positive and non-significant association with SSI. The seed yield under moisture stress condition (Ys) had significant and positive association with STI, MP, GMP, YI, K1STI and K2STI, and significant negative association with SSI. While TOL and SSPI exhibited negative and non-significant association with seed yield under stress condition (Ys). The results showed that STI, MP, GMP, YI, K1STI and K2STI were more effective in identifying high yielding genotypes in both stress and non-stress conditions while, TOL, SSI, YI and SSPI under moisture stress condition. Based upon the mean seed yield and overall rank, the genotypes UD-705, UD-529, UD-769, RCr-20 and RCr-475 were found most tolerant. Hence, these genotypes may be used in further moisture stress breeding programmes for development of resistant varieties for drought.
Ravi Kumawat, Dhirendra Singh, Kana Ram Kumawat, Madhu Choudhary and Sarla Kumawat. Effect of moisture stress on yield of coriander (Coriandrum sativum L.) Genotypes by moisture stress indices. J Pharmacogn Phytochem 2017;6(4):1493-1498.