Effect of different production systems on flowering and maturity duration of basmati rice genotypes

Abstract

The study of G×E Interaction (GEI) is critical for evaluating the mean performance and stability of cultivars across wide range of environmental conditions. An experiment was conducted during kharif 2014–2015 for discriminating 22 basmati rice genotypes for days to 50% flowering and days to 75% maturity using AMMI and regression stability models under four different environments viz. direct (DSR-wet) and (DSR-dry) and indirect seeding transplanted rice (TPR) and system of rice intensification (SRI) conditions at CCS HAU farm, Kaul. Estimates of G×E interaction following Eberhart and Russell (1966) and AMMI biplot analysis as per Gauch and Zobel model (1989) were computed. For days to 50% flowering, genotypes like Pusa Basmati 6, Pusa Sugandh 3, Haryana Basmati-1 and Pusa RH 10 were identified under SRI; CSR-30 under DSR (dry) and DSR (wet) and HKR 98–476, Pusa Sugandh 2 and Pusa Sugandh 5 under TPR conditions. However, for days to 75% maturity Pusa Sugandh 3, Pusa Basmati 1121, Pusa Basmati 1 and HKR 06–434 were adapted best to SRI; Traori Basmati, Basmati-370, HKR 98–476 and HKR 06–443 to TPR and DSR (dry) and HKR 06–487 and Pusa RH 10 to DSR (wet).