Vol. 11, Issue 12 (2022)

Author(s):
Veer Vikram Singh Bhandari, Dr. AN Tikle and Ratnakar Pandey

Abstract:
An attempt has been made in the present investigation entitled “Genotype X environments interaction analysis in Indian mustard (Brassica juncea (L.) Czern & Coss) genotypes under micro environments” to know genetic diversity and stability parameters of diverse genotypes during Rabi 2021-22 with three environments at the village Naugaya, Bharatpur, Rajasthan. Experimental material consisted of 20 Indian mustard genotypes under Randomized Complete Block Design and observation recorded for eight quantitative traits viz., Days to 50% flowering, Days to maturity, Plant height, Number of primary branches per plant, Number of secondary branches per pant, Number of siliquae on main raceme, Biological yield per plant, Seed yield per plant. Analysis of variance showed genotypes were highly significant for all the traits in EI, EII and EIII. Magnitude of PCV % and GCV % for different traits revealed that the maximum amount of variability was found for number of secondary branches per plant in EII and EIII of Indian mustard. High heritability was observed for all traits viz., Days to 50% flowering, Days to maturity, Plant height (cm), Number of primary branches per plant, Number of secondary branches per plant, Number of siliquae on main raceme, Biological yield and Seed yield per plant (g) in EI, EII and EII of Indian mustard. Significant and positive correlation was observed for seed yield per plant with number of primary branches per plant, number of secondary branches per plant, number of siliqua on main raceme and biological yield in all the environments. Path coefficient analysis revealed that number of siliquae on main raceme, number of primary branches per plant, number of secondary branches per plant, days to maturity and plant height had the highest positive direct effect on seed yield per plant. Two different dates of sowing creating eight artificial environments. Variance due to G x E interaction was significant for all the characters except for days to 50% flowering, while G x E (linear) was found to be significant for number of secondary branches per plant, number of siliquae per plant, siliqua length, seed yield per plot and 1000 seed weight. Genotypes, GM-2, JD-6 and Pusa Bold could be recommended for general cultivation and their utilization in future breeding programme. Under favourable environments, genotypes Kranti, NDRE-7, NDRE-22 and Sej- 2 are suitable for general cultivation. On the contrary, Urvashi could be recommended for poor/unfavourable environmental conditions.